[FFmpeg-trac] #3728(avdevice:new): v4l TV Sound Problem: Silent Sound In Captured File

FFmpeg trac at avcodec.org
Thu Jun 19 17:25:07 CEST 2014


#3728: v4l TV Sound Problem: Silent Sound In Captured File
-------------------------------------+-------------------------------------
             Reporter:  llarevo      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avdevice
              Version:  unspecified  |               Resolution:
             Keywords:  v4l sound    |               Blocked By:
  mute                               |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by llarevo):

 * keywords:  v4l2 => v4l sound mute


Comment:

 With current GIT I have a problem with alsa.

 Minimum configuration
 {{{
 /usr/local/bin/ffmpeg -f alsa -i hw:1 -f video4linux2 -i /dev/video0
 -aspect 4/3 -f vob -target pal-dvd out.mpg
 ffmpeg version N-64078-g47c8d1e Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Jun 19 2014 16:32:27 with gcc 4.8.2 (GCC) 20131212 (Red Hat
 4.8.2-7)
   configuration: --prefix=/usr/local --enable-ffplay --enable-libv4l2
   libavutil      52. 89.100 / 52. 89.100
   libavcodec     55. 67.100 / 55. 67.100
   libavformat    55. 44.100 / 55. 44.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  8.100 /  4.  8.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
 Unknown input format: 'alsa'
 }}}


 Similar compile options as ffmpeg in fedora-package:
 {{{
 /usr/local/bin/ffmpeg -f alsa -i hw:1 -f video4linux2 -i /dev/video0
 -aspect 4/3 -format vob -target pal-dvd out.mpg
 ffmpeg version N-64078-g47c8d1e Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Jun 19 2014 17:20:25 with gcc 4.8.2 (GCC) 20131212 (Red Hat
 4.8.2-7)
   configuration: --prefix=/usr/local --bindir=/usr/local/bin
 --datadir=/usr/local/share/ffmpeg --incdir=/usr/local/include/ffmpeg
 --libdir=/usr/local/lib64 --mandir=/usr/local/share/man --arch=x86_64
 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
 -fstack-protector --param=ssp-buffer-size=4 -grecord-gcc-switches -m64
 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r
 --enable-gnutls --enable-libass --enable-libcelt --enable-libdc1394
 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-
 libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg
 --enable-libopus --enable-libpulse --enable-libschroedinger --enable-
 libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-
 libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-
 avfilter --enable-avresample --enable-postproc --enable-pthreads
 --disable-static --enable-shared --enable-gpl --disable-debug --disable-
 stripping --shlibdir=/usr/local/lib64 --enable-runtime-cpudetect
   libavutil      52. 89.100 / 52. 89.100
   libavcodec     55. 67.100 / 55. 67.100
   libavformat    55. 44.100 / 55. 44.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  8.100 /  4.  8.100
   libavresample   1.  3.  0 /  1.  3.  0
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 Unknown input format: 'alsa'

 }}}

 Maybe I messed up the compiling procedure. In this case please give me
 some advice. Then I can do some further testing on request.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3728#comment:3>
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