[alsa-devel] PROBLEM: SIS7019 stops recording after 42 min

[Hans Schou]

2010/6/21 Hans Schou <linux at schou.dk>:

> I have just started:
>  arecord -B 1000000 -F 500000 -c 1 -r 44100 -f S16 -M -D hw:0,0 -v arec.wav

It gave a file size of 258822944 bytes. Almost 50 min:
  echo "258822944/(2*60*44100)" | bc -ql
48.90

This is the longest recording I have made on this hardware.

I have this running now:
+ arecord -B 200000 -F 100000 -c 1 -r 44100 -f S16 -M -D hw:0,0 -v arec.wav
Recording WAVE 'arec.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
Hardware PCM card 0 'SiS7019' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : MMAP_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 1
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 8820
  period_size  : 4410
  period_time  : 100000
  tick_time    : 0
  tstamp_mode  : NONE
  period_step  : 1
  sleep_min    : 0
  avail_min    : 4410
  xfer_align   : 4410
  start_threshold  : 1
  stop_threshold   : 8820
  silence_threshold: 0
  silence_size : 0
  boundary     : 1244678400

and no overrun within 2 min.

/hans