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

[FFmpeg]

#2504: Audio glitches and distortion when recording alsa
------------------------------------+------------------------------------
             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           |
------------------------------------+------------------------------------

Comment (by MrNice):

 Sorry for my ignorance, I forgot to change directory.
 I did it and removed the line 193 and saved the file.

 {{{
 $ ffmpeg -f alsa -ac 2 -i hw:0,0 -y out.wav
 ffmpeg version 0.10.4 Copyright (c) 2000-2012 the FFmpeg developers
   built on Jul 25 2012 15:45:46 with gcc 4.4.6 20120305 (Red Hat 4.4.6-4)
   configuration: --prefix=/usr --bindir=/usr/bin
 --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
 --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --extra-
 cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-
 protector --param=ssp-buffer-size=4 -m64 -mtune=generic' --enable-bzlib
 --disable-crystalhd --enable-gnutls --enable-libass --enable-libcdio
 --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-
 libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-
 libpulse --enable-librtmp --enable-libschroedinger --enable-libspeex
 --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264
 --enable-libxvid --enable-x11grab --enable-avfilter --enable-postproc
 --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-
 debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
   libavutil      51. 35.100 / 51. 35.100
   libavcodec     53. 61.100 / 53. 61.100
   libavformat    53. 32.100 / 53. 32.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 61.100 /  2. 61.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0.  6.100 /  0.  6.100
   libpostproc    52.  0.100 / 52.  0.100
 [alsa @ 0x17dc000] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, alsa, from 'hw:0,0':
   Duration: N/A, start: 1370900485.195499, bitrate: N/A
     Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
 Output #0, wav, to 'out.wav':
   Metadata:
     encoder         : Lavf53.32.100
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2
 channels, s16, 1536 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le)
 Press [q] to stop, [?] for help
 size=    1517kB time=00:00:08.08 bitrate=1536.0kbits/s
 video:0kB audio:1517kB global headers:0kB muxing overhead 0.002962%

 }}}

 Distortions are still here, not good.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2504#comment:81>
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