[FFmpeg-trac] #2504(undetermined:new): Audio glitches and distortion when recording and direct play

[FFmpeg]

#2504: Audio glitches and distortion when recording and direct play
-------------------------------------+-------------------------------------
             Reporter:  MrNice       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by MrNice):

 Hi
 My new test
 {{{
 $ ffmpeg -f alsa -ac 2 -i hw:0,0 out.wav
 FFmpeg version UNKNOWN, Copyright (c) 2000-2009 Fabrice Bellard, et al.
   configuration: --prefix=/opt/ffmpeg-opt/usr --bindir=/opt/ffmpeg-
 opt/usr/bin --datadir=/opt/ffmpeg-opt/usr/share/ffmpeg-opt --incdir=/opt
 /ffmpeg-opt/usr/include/ffmpeg-opt --libdir=/opt/ffmpeg-opt/usr/lib64
 --mandir=/opt/ffmpeg-opt/usr/share/man --shlibdir=/opt/ffmpeg-
 opt/usr/lib64 --arch=x86_64
   libavutil     49.14. 0 / 49.14. 0
   libavcodec    52.11. 0 / 52.11. 0
   libavformat   52.25. 0 / 52.25. 0
   libavdevice   52. 1. 0 / 52. 1. 0
   built on May 21 2013 15:29:58, gcc: 4.4.7 20120313 (Red Hat 4.4.7-3)
 Input #0, alsa, from 'hw:0,0':
   Duration: N/A, start: 46721.105014, bitrate: N/A
     Stream #0.0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
 Output #0, wav, to 'out.wav':
     Stream #0.0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
 Stream mapping:
   Stream #0.0 -> #0.0
 Press [q] to stop encoding
 size=    2516kB time=14.61 bitrate=1411.2kbits/s
 video:0kB audio:2516kB global headers:0kB muxing overhead 0.001708%
 }}}
 Now audio is good :-)
 I tried with flac and mp3 as well, this is good.
 I went further and run the command in the first post above.
 {{{
 ffmpeg-opt -debug 1 -vn -f alsa -ac 2 -channel_layout stereo -i hw:0,0
 -c:a pcm_s16le /Store3/Test/pcm_`date +%m%d_%H%M`.wav
 FFmpeg version UNKNOWN, Copyright (c) 2000-2009 Fabrice Bellard, et al.
   configuration: --prefix=/opt/ffmpeg-opt/usr --bindir=/opt/ffmpeg-
 opt/usr/bin --datadir=/opt/ffmpeg-opt/usr/share/ffmpeg-opt --incdir=/opt
 /ffmpeg-opt/usr/include/ffmpeg-opt --libdir=/opt/ffmpeg-opt/usr/lib64
 --mandir=/opt/ffmpeg-opt/usr/share/man --shlibdir=/opt/ffmpeg-
 opt/usr/lib64 --arch=x86_64
   libavutil     49.14. 0 / 49.14. 0
   libavcodec    52.11. 0 / 52.11. 0
   libavformat   52.25. 0 / 52.25. 0
   libavdevice   52. 1. 0 / 52. 1. 0
   built on May 21 2013 15:29:58, gcc: 4.4.7 20120313 (Red Hat 4.4.7-3)
 Unable to parse option value "stereo": undefined constant or missing (
 Invalid value 'stereo' for option 'channel_layout'
 }}}
 I'd guess you know why this error.
 But we did a good step.
 What next?

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2504#comment:24>
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