[FFmpeg-trac] #2504(avdevice:new): Audio glitches and distortion when recording alsa

[FFmpeg]

#2504: Audio glitches and distortion when recording alsa
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             Reporter:  MrNice      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  important   |                Component:  avdevice
              Version:  git-master  |               Resolution:
             Keywords:  regression  |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by cehoyos):

 The conclusion is that - as you found out - this is a regression since
 3cac2f1 for you.
 You can disable the non-blocking mode by removing {{{flags =
 SND_PCM_NONBLOCK;}}} from line 193 in libavdevice/alsa-audio-common.c but
 since it is unlikely that there is a bug in FFmpeg (that is what another
 developer explained to me), I would suggest to test with updated (alsa)
 drivers, or, if this is possible, with another system that uses the same
 mainboard.

 Some random ideas are to boot from a (recent) live CD and use one of the
 static binaries from http://ffmpeg.org/download.html - I don't know if
 they have alsa support though - or to switch harddisk and quickly install
 something more recent.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2504#comment:73>
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