[alsa-devel] Fwd: question about webcam audio capture

vichy vichy.kuo at gmail.com
Mon Sep 9 11:38:27 CEST 2013


hi Clements:
I am sorry to bother you by sending this mail directly, since I found
the mail I sent last night is rejected due to alsa-devel doesn't allow
 "Post by non-member to a members-only list"

except below #1 requirement I need your help, if I purposely want to
sent fixed number of urbs by myself to easily debug, would you please
tell me where I can modify the source code?

In my case, the default alsa seems use 8 urbs to repeat
send/complete/....send/complete to quire data from ep.
(my high-speed webcam has an enpoint with packet length 132, interval
= 8 microframe )
Below is one of end point description.
Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0084  1x 132 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0


If I want to use 2 urbs and only send/complete 1 round, would you
please where I can find the source code to modify?

thanks for your kind help,


---------- Forwarded message ----------
From: vichy <vichy.kuo at gmail.com>
Date: 2013/9/8
Subject: question about webcam audio capture
To: linux-usb at vger.kernel.org, alsa-devel at alsa-project.org


hi all:
I try to do webcam audio capture on my arm platform.
when I execute audio capture I got below message
"retire_capture_urb: 108 callbacks suppressed"

my questions:
1. where I can get the message "retire_capture_urb: 108 callbacks
suppressed" show in sound/usb driver?
    I try to  grep -rwn '"retire_capture_urb.*' sound/usb/*, but get nothing.
what does "retire_capture_urb: 108 callbacks
suppressed"  mean?

2. from usb mon log, it seems HW keep Active status high even until
ehci_io_watchdog happen, because the ep status is  -EXDEV.
if my observation is correct, is it possible to modify usb sound
driver to purposely send fix number urbs.
Because from the usb mon log, the first 8 urb will get time out already.


thanks for your help in advance,
-------------- next part --------------
Alsa capability
	Device: hw:1 (type: HW)
	Access types: MMAP_INTERLEAVED RW_INTERLEAVED
	Formats: S16_LE
	Channels: 2
	Sample rates: 16000 32000
	Interrupt interval: 1000-8192000 us
	Buffer time: 1000-16384000 us

Bus 001 Device 003: ID 046d:0821 Logitech, Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x046d Logitech, Inc.
  idProduct          0x0821 
  bcdDevice            0.10
  iManufacturer           0 
  iProduct                0 
  iSerial                 1 E5D981A0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength         3265
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass          1 Audio
      bFunctionSubClass       2 Streaming
      bFunctionProtocol       0 
      iFunction               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength           38
        bInCollection           1
        baInterfaceNr( 0)       1
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bNrChannels             1
        wChannelConfig     0x0003
          Left Front (L)
          Right Front (R)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               5
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                 8
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 5
        bSourceID               1
        bControlSize            1
        bmaControls( 0)      0x03
          Mute
          Volume
        iFeature                0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            1 Discrete
        tSamFreq[ 0]        16000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0044  1x 68 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay              0 Undefined
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            1 Discrete
        tSamFreq[ 0]        24000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0064  1x 100 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay              0 Undefined
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            1 Discrete
        tSamFreq[ 0]        32000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0084  1x 132 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay              0 Undefined
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         2
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              0 
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength          188
        dwClockFrequency       48.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       3
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          0
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x00020a2e
          Auto-Exposure Mode
          Auto-Exposure Priority
          Exposure Time (Absolute)
          Focus (Absolute)
          Zoom (Absolute)
          PanTilt (Absolute)
          Focus, Auto
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 2
        bSourceID               1
        wMaxMultiplier      16384
        bControlSize            2
        bmControls     0x0000175b
          Brightness
          Contrast
          Saturation
          Sharpness
          White Balance Temperature
          Backlight Compensation
          Gain
          Power Line Frequency
          White Balance Temperature, Auto
        iProcessing             0 
        bmVideoStandards     0x1d
          None
          PAL - 625/50
          SECAM - 625/50
          NTSC - 625/50
      VideoControl Interface Descriptor:
        bLength                29
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 4
        guidExtensionCode         {991d5a7d-325b-8b42-8cad-671b8a65f37a}
        bNumControl             0
        bNrPins                 1
        baSourceID( 0)          2
        bControlSize            4
        bmControls( 0)       0x3f
        bmControls( 1)       0x00
        bmControls( 2)       0x07
        bmControls( 3)       0x00
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                27
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 5
        guidExtensionCode         {e48e6769-0f41-db40-a850-7420d7d8240e}
        bNumControl             8
        bNrPins                 1
        baSourceID( 0)          1
        bControlSize            2
        bmControls( 0)       0x3f
        bmControls( 1)       0x03
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                28
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 6
        guidExtensionCode         {a94c5d1f-11de-8744-840d-50933c8ec8d1}
        bNumControl            16
        bNrPins                 1
        baSourceID( 0)          1
        bControlSize            3
        bmControls( 0)       0xff
        bmControls( 1)       0xff
        bmControls( 2)       0x03
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                26
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 7
        guidExtensionCode         {1502e449-34f4-fe47-b158-0e885023e51b}
        bNumControl             9
        bNrPins                 1
        baSourceID( 0)          1
        bControlSize            1
        bmControls( 0)       0x7f
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                27
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 8
        guidExtensionCode         {212de5ff-3080-2c4e-82d9-f587d00540bd}
        bNumControl            10
        bNrPins                 1
        baSourceID( 0)          1
        bControlSize            2
        bmControls( 0)       0x00
        bmControls( 1)       0x03
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               4
        iTerminal               0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x87  EP 7 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               8
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      VideoStreaming Interface Descriptor:
        bLength                            15
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         2
        wTotalLength                     2661
        bEndPointAddress                  129
        bmInfo                              0
        bTerminalLink                       3
        bStillCaptureMethod                 1
        bTriggerSupport                     0
        bTriggerUsage                       0
        bControlSize                        1
        bmaControls( 0)                    27
        bmaControls( 1)                    27
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        1
        bNumFrameDescriptors               28
        guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 1 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x01
          Still image supported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                 24576000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x01
          Still image supported
        wWidth                            160
        wHeight                           120
        dwMinBitRate                  1536000
        dwMaxBitRate                  9216000
        dwMaxVideoFrameBufferSize       38400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x01
          Still image supported
        wWidth                            176
        wHeight                           144
        dwMinBitRate                  2027520
        dwMaxBitRate                 12165120
        dwMaxVideoFrameBufferSize       50688
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x01
          Still image supported
        wWidth                            320
        wHeight                           176
        dwMinBitRate                  4505600
        dwMaxBitRate                 27033600
        dwMaxVideoFrameBufferSize      112640
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         5
        bmCapabilities                   0x01
          Still image supported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                  6144000
        dwMaxBitRate                 36864000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         6
        bmCapabilities                   0x01
          Still image supported
        wWidth                            432
        wHeight                           240
        dwMinBitRate                  8294400
        dwMaxBitRate                 49766400
        dwMaxVideoFrameBufferSize      207360
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         7
        bmCapabilities                   0x01
          Still image supported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                  8110080
        dwMaxBitRate                 48660480
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         8
        bmCapabilities                   0x01
          Still image supported
        wWidth                            544
        wHeight                           288
        dwMinBitRate                 12533760
        dwMaxBitRate                 75202560
        dwMaxVideoFrameBufferSize      313344
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         9
        bmCapabilities                   0x01
          Still image supported
        wWidth                            640
        wHeight                           360
        dwMinBitRate                 18432000
        dwMaxBitRate                110592000
        dwMaxVideoFrameBufferSize      460800
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        10
        bmCapabilities                   0x01
          Still image supported
        wWidth                            752
        wHeight                           416
        dwMinBitRate                 25026560
        dwMaxBitRate                120127488
        dwMaxVideoFrameBufferSize      625664
        dwDefaultFrameInterval         416666
        bFrameIntervalType                  6
        dwFrameInterval( 0)            416666
        dwFrameInterval( 1)            500000
        dwFrameInterval( 2)            666666
        dwFrameInterval( 3)           1000000
        dwFrameInterval( 4)           1333333
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        11
        bmCapabilities                   0x01
          Still image supported
        wWidth                            800
        wHeight                           448
        dwMinBitRate                 28672000
        dwMaxBitRate                137625600
        dwMaxVideoFrameBufferSize      716800
        dwDefaultFrameInterval         416666
        bFrameIntervalType                  6
        dwFrameInterval( 0)            416666
        dwFrameInterval( 1)            500000
        dwFrameInterval( 2)            666666
        dwFrameInterval( 3)           1000000
        dwFrameInterval( 4)           1333333
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            46
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        12
        bmCapabilities                   0x01
          Still image supported
        wWidth                            864
        wHeight                           480
        dwMinBitRate                 33177600
        dwMaxBitRate                132710400
        dwMaxVideoFrameBufferSize      829440
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  5
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           1333333
        dwFrameInterval( 4)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            46
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        13
        bmCapabilities                   0x01
          Still image supported
        wWidth                            960
        wHeight                           544
        dwMinBitRate                 41779200
        dwMaxBitRate                167116800
        dwMaxVideoFrameBufferSize     1044480
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  5
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           1333333
        dwFrameInterval( 4)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            38
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        14
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1024
        wHeight                           576
        dwMinBitRate                 47185920
        dwMaxBitRate                 94371840
        dwMaxVideoFrameBufferSize     1179648
        dwDefaultFrameInterval        1000000
        bFrameIntervalType                  3
        dwFrameInterval( 0)           1000000
        dwFrameInterval( 1)           1333333
        dwFrameInterval( 2)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            46
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        15
        bmCapabilities                   0x01
          Still image supported
        wWidth                            800
        wHeight                           600
        dwMinBitRate                 38400000
        dwMaxBitRate                153600000
        dwMaxVideoFrameBufferSize      960000
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  5
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           1333333
        dwFrameInterval( 4)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            38
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
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        bmCapabilities                   0x01
          Still image supported
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        wHeight                           656
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        dwMaxBitRate                124272640
        dwMaxVideoFrameBufferSize     1553408
        dwDefaultFrameInterval        1000000
        bFrameIntervalType                  3
        dwFrameInterval( 0)           1000000
        dwFrameInterval( 1)           1333333
        dwFrameInterval( 2)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        17
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           720
        dwMinBitRate                 55296000
        dwMaxBitRate                165888000
        dwMaxVideoFrameBufferSize     1382400
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        18
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           720
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        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize     1843200
        dwDefaultFrameInterval        1000000
        bFrameIntervalType                  3
        dwFrameInterval( 0)           1000000
        dwFrameInterval( 1)           1333333
        dwFrameInterval( 2)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        19
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           768
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        dwMaxBitRate                128286720
        dwMaxVideoFrameBufferSize     2138112
        dwDefaultFrameInterval        1333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)           1333333
        dwFrameInterval( 1)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        20
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           832
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        dwMaxBitRate                100106240
        dwMaxVideoFrameBufferSize     2502656
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        21
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           896
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        dwMaxBitRate                114688000
        dwMaxVideoFrameBufferSize     2867200
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        22
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           960
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        dwMaxBitRate                 98304000
        dwMaxVideoFrameBufferSize     2457600
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        23
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           960
        dwMinBitRate                131481600
        dwMaxBitRate                131481600
        dwMaxVideoFrameBufferSize     3287040
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        24
        bmCapabilities                   0x01
          Still image supported
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        wHeight                          1008
        dwMinBitRate                144506880
        dwMaxBitRate                144506880
        dwMaxVideoFrameBufferSize     3612672
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        25
        bmCapabilities                   0x01
          Still image supported
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        wHeight                          1080
        dwMinBitRate                165888000
        dwMaxBitRate                165888000
        dwMaxVideoFrameBufferSize     4147200
        dwDefaultFrameInterval        4999998
        bFrameIntervalType                  1
        dwFrameInterval( 0)           4999998
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        26
        bmCapabilities                   0x01
          Still image supported
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        wHeight                          1200
        dwMinBitRate                153600000
        dwMaxBitRate                153600000
        dwMaxVideoFrameBufferSize     3840000
        dwDefaultFrameInterval        4999998
        bFrameIntervalType                  1
        dwFrameInterval( 0)           4999998
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        27
        bmCapabilities                   0x01
          Still image supported
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        wHeight                          1536
        dwMinBitRate                251658240
        dwMaxBitRate                251658240
        dwMaxVideoFrameBufferSize     6291456
        dwDefaultFrameInterval        4999998
        bFrameIntervalType                  1
        dwFrameInterval( 0)           4999998
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        28
        bmCapabilities                   0x01
          Still image supported
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        wHeight                          1944
        dwMinBitRate                403107840
        dwMaxBitRate                403107840
        dwMaxVideoFrameBufferSize    10077696
        dwDefaultFrameInterval        4999998
        bFrameIntervalType                  1
        dwFrameInterval( 0)           4999998
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  6 (FORMAT_MJPEG)
        bFormatIndex                        2
        bNumFrameDescriptors               28
        bFlags                              1
          Fixed-size samples: Yes
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
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          Interlaced stream or variable: No
          Fields per frame: 1 fields
          Field 1 first: No
          Field pattern: Field 1 only
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      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         1
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           480
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        dwMaxBitRate                294912000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  8
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        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            416666
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           1333333
        dwFrameInterval( 7)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         2
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           120
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        dwMaxBitRate                  9216000
        dwMaxVideoFrameBufferSize       38400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         3
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           144
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        dwMaxBitRate                 12165120
        dwMaxVideoFrameBufferSize       50688
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         4
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           176
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        dwMaxBitRate                 27033600
        dwMaxVideoFrameBufferSize      112640
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         5
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           240
        dwMinBitRate                  6144000
        dwMaxBitRate                 73728000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  8
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            416666
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           1333333
        dwFrameInterval( 7)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         6
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           240
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        dwMaxBitRate                 49766400
        dwMaxVideoFrameBufferSize      207360
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         7
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           288
        dwMinBitRate                  8110080
        dwMaxBitRate                 48660480
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         8
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           288
        dwMinBitRate                 12533760
        dwMaxBitRate                 75202560
        dwMaxVideoFrameBufferSize      313344
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         9
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           360
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        dwMaxBitRate                221184000
        dwMaxVideoFrameBufferSize      460800
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  8
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            416666
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           1333333
        dwFrameInterval( 7)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        10
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           416
        dwMinBitRate                 25026560
        dwMaxBitRate                150159360
        dwMaxVideoFrameBufferSize      625664
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        11
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           448
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        dwMaxBitRate                172032000
        dwMaxVideoFrameBufferSize      716800
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        12
        bmCapabilities                   0x01
          Still image supported
        wWidth                            864
        wHeight                           480
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        dwMaxBitRate                199065600
        dwMaxVideoFrameBufferSize      829440
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        13
        bmCapabilities                   0x01
          Still image supported
        wWidth                            960
        wHeight                           544
        dwMinBitRate                 41779200
        dwMaxBitRate                250675200
        dwMaxVideoFrameBufferSize     1044480
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        14
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           576
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        dwMaxBitRate                283115520
        dwMaxVideoFrameBufferSize     1179648
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        15
        bmCapabilities                   0x01
          Still image supported
        wWidth                            800
        wHeight                           600
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        dwMaxVideoFrameBufferSize      960000
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        16
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           656
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        dwMaxBitRate                372817920
        dwMaxVideoFrameBufferSize     1553408
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        17
        bmCapabilities                   0x01
          Still image supported
        wWidth                            960
        wHeight                           720
        dwMinBitRate                 55296000
        dwMaxBitRate                331776000
        dwMaxVideoFrameBufferSize     1382400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        18
        bmCapabilities                   0x01
          Still image supported
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        dwMaxVideoFrameBufferSize     1843200
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        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        19
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           768
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        dwMaxBitRate                256573440
        dwMaxVideoFrameBufferSize     2138112
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        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        20
        bmCapabilities                   0x01
          Still image supported
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        wHeight                           832
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        dwMaxVideoFrameBufferSize     2502656
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        21
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1600
        wHeight                           896
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        dwMaxVideoFrameBufferSize     2867200
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        22
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1280
        wHeight                           960
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        dwMaxBitRate                294912000
        dwMaxVideoFrameBufferSize     2457600
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        23
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1712
        wHeight                           960
        dwMinBitRate                131481600
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        dwMaxVideoFrameBufferSize     3287040
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        24
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1792
        wHeight                          1008
        dwMinBitRate                144506880
        dwMaxBitRate                433520640
        dwMaxVideoFrameBufferSize     3612672
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        25
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1920
        wHeight                          1080
        dwMinBitRate                165888000
        dwMaxBitRate                995328000
        dwMaxVideoFrameBufferSize     4147200
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  7
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            416666
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           1333333
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        26
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1600
        wHeight                          1200
        dwMinBitRate                153600000
        dwMaxBitRate                460800000
        dwMaxVideoFrameBufferSize     3840000
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        27
        bmCapabilities                   0x01
          Still image supported
        wWidth                           2048
        wHeight                          1536
        dwMinBitRate                251658240
        dwMaxBitRate                754974720
        dwMaxVideoFrameBufferSize     6291456
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  4
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           1333333
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
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        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        28
        bmCapabilities                   0x01
          Still image supported
        wWidth                           2592
        wHeight                          1944
        dwMinBitRate                403107840
        dwMaxBitRate                806215680
        dwMaxVideoFrameBufferSize    10077696
        dwDefaultFrameInterval        1000000
        bFrameIntervalType                  3
        dwFrameInterval( 0)           1000000
        dwFrameInterval( 1)           1333333
        dwFrameInterval( 2)           2000000
      VideoStreaming Interface Descriptor:
        bLength                             6
        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x00c0  1x 192 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0180  1x 384 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       4
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0280  1x 640 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       5
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0320  1x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       6
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x03b0  1x 944 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       7
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0a80  2x 640 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       8
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0b20  2x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       9
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0be0  2x 992 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting      10
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x13fc  3x 1020 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting      11
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x13fc  3x 1020 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)
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