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• Avconv : Select german stream not highest quality one

  6 novembre 2017, par mblaettermann

  I am converting some input stream from my DVB S2 Card to RTMP.

  Everything works fine after switching to recent avconv and x264 :)

  The only thing I couldn’t find out is, how do I select the right audio stream ?

  The source sometimes has up to 6 audio tracks. Avconv automatically chooses the one with the highest bitrate. However I want to select the "ger" one :

  Here are the streams of ARTE german/french TV Channel for example :

  Input #0, mpegts, from 'http://192.168.1.50:9981/stream/channelid/1035':
  
    Duration: N/A, start: 19083.694722, bitrate: 15576 kb/s
  
    Program 1
  
      Stream #0.0[0xa8], 127, 1/90000: Video: mpeg2video (Main), yuv420p, 544x576 [PAR 32:17 DAR 16:9], 1/50, 15000 kb/s, 25 fps, 90k tb50 tbc
  
      Stream #0.1[0x70](fre), 204, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s
  
      Stream #0.2[0x71](ger), 207, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 128 kb/s
  
      Stream #0.3[0x72](eng), 207, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 128 kb/s
  
      Stream #0.4[0x73](qaa), 207, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 128 kb/s
  
    No Program
  
      Stream #0.5[0x3b], 126, 1/90000: Audio: mp1, 0 channels, s16p

  libav Docs are really not that helpful. Who does now the right syntax ?

  EDIT : I found the -map option : http://ffmpeg.org/trac/ffmpeg/wiki/How%20to%20use%20-map%20option But it is not possible to map by name ? Only by index ?

  Maybe I need to use avprobe then, to find the corrent stream index for "ger".

• Avconv : Select german stream not highest quality one

  15 novembre 2013, par mblaettermann

  I am converting some input stream from my DVB S2 Card to RTMP.

  Everything works fine after switching to recent avconv and x264 :)

  The only thing I couldn't find out is, how do I select the right audio stream ?

  The source sometimes has up to 6 audio tracks. Avconv automatically chooses the one with the highest bitrate. However I want to select the "ger" one :

  Here are the streams of ARTE german/french TV Channel for example :

  Input #0, mpegts, from 'http://192.168.1.50:9981/stream/channelid/1035':
  
    Duration: N/A, start: 19083.694722, bitrate: 15576 kb/s
  
    Program 1
  
      Stream #0.0[0xa8], 127, 1/90000: Video: mpeg2video (Main), yuv420p, 544x576 [PAR 32:17 DAR 16:9], 1/50, 15000 kb/s, 25 fps, 90k tb50 tbc
  
      Stream #0.1[0x70](fre), 204, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s
  
      Stream #0.2[0x71](ger), 207, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 128 kb/s
  
      Stream #0.3[0x72](eng), 207, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 128 kb/s
  
      Stream #0.4[0x73](qaa), 207, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 128 kb/s
  
    No Program
  
      Stream #0.5[0x3b], 126, 1/90000: Audio: mp1, 0 channels, s16p

  libav Docs are really not that helpful. Who does now the right syntax ?

  EDIT : I found the -map option : http://ffmpeg.org/trac/ffmpeg/wiki/How%20to%20use%20-map%20option But it is not possible to map by name ? Only by index ?

  Maybe I need to use avprobe then, to find the corrent stream index for "ger".

• Error : libfdk_aac must be installed

  31 janvier 2020, par xirukitepe

  Hi I am trying to compile ffmpeg but this error shows :

  ☁  ffmpeg [master] ./configure --enable-gpl --enable-version3 --enable-nonfree \
  
  --enable-postproc --enable-libass \
  
  --enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-libfreetype \
  
  --enable-libmp3lame --enable-libopencore-amrnb \
  
  --enable-libopencore-amrwb --enable-libopenjpeg \
  
  --enable-openssl --enable-libschroedinger --enable-libtheora \
  
  --enable-libvo-aacenc --enable-libvorbis --enable-libvpx \
  
  --enable-libx264 --enable-libxvid --prefix=/usr
  
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  ERROR: libfdk_aac must be installed and version must be >= 3.4.12.
  
  
  
  If you think configure made a mistake, make sure you are using the latest
  
  version from Git.  If the latest version fails, report the problem to the
  
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
  
  Include the log file "config.log" produced by configure as this will help
  
  solving the problem.

  I am simply following this compilation guide : https://trac.ffmpeg.org/wiki/MacOSXCompilationGuide