[alsa-devel] question about webcam audio capture

[vichy]

hi Clemens:

2013/9/10 Clemens Ladisch <clemens at ladisch.de>:
> vichy wrote:
>> 2013/9/9 Clemens Ladisch <clemens at ladisch.de>:
>>> vichy wrote:
>>>> 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"
>>>
>>> This means that the retire_capture_urb() function printed lots of
>>> messages, and that 108 of them were thrown away because they were
>>> identical.
>>
>> Does that mean:
>> 1. 108 of messages are the same and through away
>
> No, that at least 109 are the same.
>
>>> You have to look at the previous line to get the actual
>>> message.
>>
>> Would you please tell me what the "previous line to get the actual
>> message"  you mean?
>
> The previous line in the message log.
>
>> tinycap record.wav -D 0 -d 0 -c 2 -r 32000
>
> Try increasng -n or -p.
>
> Does recoding on a PC with the same parameters work?
the same parameters work well on PC.
I think it is ehci hardware problem on my embedded system.

Appreciate your kind help :)