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

FFmpeg trac at avcodec.org
Mon May 20 17:35:53 CEST 2013


#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):

 {{{
 $ ffmpeg -f alsa -i hw:0,0 out.wav
 ffmpeg version N-52061-g8137ea3 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Apr 13 2013 21:10:51 with gcc 4.4.7 (GCC) 20120313 (Red Hat
 4.4.7-3)
   configuration: --prefix=/opt/ffmpeg-opt/usr --enable-shared
 --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 --optflags='-O2 -g'
 --enable-bzlib --disable-crystalhd --enable-gnutls --enable-libass
 --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-
 libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-
 libopus --enable-libpulse --enable-libschroedinger --enable-libspeex
 --enable-libtheora --enable-libvorbis --enable-libx264 --disable-libv4l2
 --enable-libxvid --enable-x11grab --enable-avfilter --enable-postproc
 --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-
 debug --disable-stripping --build-suffix=1 --disable-doc --enable-runtime-
 cpudetect
   libavutil      52. 26.100 / 52. 26.100
   libavcodec     55.  2.100 / 55.  2.100
   libavformat    55.  2.100 / 55.  2.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 53.101 /  3. 53.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 Guessed Channel Layout for  Input Stream #0.0 : stereo
 Input #0, alsa, from 'hw:0,0':
   Duration: N/A, start: 1369063993.303548, bitrate: 1536 kb/s
     Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
 Output #0, wav, to 'out.wav':
   Metadata:
     ISFT            : Lavf55.2.100
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz,
 stereo, s16, 1536 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le)
 Press [q] to stop, [?] for help
 size=    2011kB time=00:00:10.72 bitrate=1536.0kbits/s
 video:0kB audio:2011kB subtitle:0 global headers:0kB muxing overhead
 0.003885%
 }}}

 Same glitches and distortion. :-(

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2504#comment:18>
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