Mix down 5.1 AC3 to Stereo WAV?












2














I wonder if I can mix down a 5.1 AC3 file to Stereo WAV file, i.e. 6-channel > 2-channel. I'd like to know how to do this with via terminal with ffmpeg (or avconv, because it says ffmpeg is deprecated).










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    I wonder if I can mix down a 5.1 AC3 file to Stereo WAV file, i.e. 6-channel > 2-channel. I'd like to know how to do this with via terminal with ffmpeg (or avconv, because it says ffmpeg is deprecated).










    share|improve this question

























      2












      2








      2







      I wonder if I can mix down a 5.1 AC3 file to Stereo WAV file, i.e. 6-channel > 2-channel. I'd like to know how to do this with via terminal with ffmpeg (or avconv, because it says ffmpeg is deprecated).










      share|improve this question













      I wonder if I can mix down a 5.1 AC3 file to Stereo WAV file, i.e. 6-channel > 2-channel. I'd like to know how to do this with via terminal with ffmpeg (or avconv, because it says ffmpeg is deprecated).







      sound convert codecs wav






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      asked Sep 10 '12 at 14:52









      medibu789

      1113




      1113






















          2 Answers
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          From man avconv, Audio Options section:



          -ac[:stream_specifier] channels (input/output,per-stream)
          Set the number of audio channels. For output streams it is set by
          default to the number of input audio channels. For input streams
          this option only makes sense for audio grabbing devices and raw
          demuxers and is mapped to the corresponding demuxer options.


          So you basic command line would be:



          avconv -i <input file> -ac 2 <output file>.wav


          You may also play with downmixing settings for the AC3 decoder, ie, the options where you can configure how the 6 channels from 5.1 will be merged (downmixed) into the 2 of stereo. Check for -dmix_mode and the -*mixlev* family of options under the Audio Encoders / ac3 section of the manual






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            0














            I don't know if avconv supports Dolby Pro Logic II, but ffmpeg does. I use the following command:



            IFL=input.ac3
            OFL=output.ogg
            /usr/bin/ffmpeg -i "$IFL"
            -codec:a libvorbis -qscale:a 6
            -ac 2 -af "aresample=matrix_encoding=dplii"
            "$OFL"


            The question was for WAV. See ffmpeg documentation for how to use wavpack instead of libvorbis.






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              2 Answers
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              2 Answers
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              2














              From man avconv, Audio Options section:



              -ac[:stream_specifier] channels (input/output,per-stream)
              Set the number of audio channels. For output streams it is set by
              default to the number of input audio channels. For input streams
              this option only makes sense for audio grabbing devices and raw
              demuxers and is mapped to the corresponding demuxer options.


              So you basic command line would be:



              avconv -i <input file> -ac 2 <output file>.wav


              You may also play with downmixing settings for the AC3 decoder, ie, the options where you can configure how the 6 channels from 5.1 will be merged (downmixed) into the 2 of stereo. Check for -dmix_mode and the -*mixlev* family of options under the Audio Encoders / ac3 section of the manual






              share|improve this answer


























                2














                From man avconv, Audio Options section:



                -ac[:stream_specifier] channels (input/output,per-stream)
                Set the number of audio channels. For output streams it is set by
                default to the number of input audio channels. For input streams
                this option only makes sense for audio grabbing devices and raw
                demuxers and is mapped to the corresponding demuxer options.


                So you basic command line would be:



                avconv -i <input file> -ac 2 <output file>.wav


                You may also play with downmixing settings for the AC3 decoder, ie, the options where you can configure how the 6 channels from 5.1 will be merged (downmixed) into the 2 of stereo. Check for -dmix_mode and the -*mixlev* family of options under the Audio Encoders / ac3 section of the manual






                share|improve this answer
























                  2












                  2








                  2






                  From man avconv, Audio Options section:



                  -ac[:stream_specifier] channels (input/output,per-stream)
                  Set the number of audio channels. For output streams it is set by
                  default to the number of input audio channels. For input streams
                  this option only makes sense for audio grabbing devices and raw
                  demuxers and is mapped to the corresponding demuxer options.


                  So you basic command line would be:



                  avconv -i <input file> -ac 2 <output file>.wav


                  You may also play with downmixing settings for the AC3 decoder, ie, the options where you can configure how the 6 channels from 5.1 will be merged (downmixed) into the 2 of stereo. Check for -dmix_mode and the -*mixlev* family of options under the Audio Encoders / ac3 section of the manual






                  share|improve this answer












                  From man avconv, Audio Options section:



                  -ac[:stream_specifier] channels (input/output,per-stream)
                  Set the number of audio channels. For output streams it is set by
                  default to the number of input audio channels. For input streams
                  this option only makes sense for audio grabbing devices and raw
                  demuxers and is mapped to the corresponding demuxer options.


                  So you basic command line would be:



                  avconv -i <input file> -ac 2 <output file>.wav


                  You may also play with downmixing settings for the AC3 decoder, ie, the options where you can configure how the 6 channels from 5.1 will be merged (downmixed) into the 2 of stereo. Check for -dmix_mode and the -*mixlev* family of options under the Audio Encoders / ac3 section of the manual







                  share|improve this answer












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                  answered Oct 1 '12 at 23:35









                  MestreLion

                  13.6k116796




                  13.6k116796

























                      0














                      I don't know if avconv supports Dolby Pro Logic II, but ffmpeg does. I use the following command:



                      IFL=input.ac3
                      OFL=output.ogg
                      /usr/bin/ffmpeg -i "$IFL"
                      -codec:a libvorbis -qscale:a 6
                      -ac 2 -af "aresample=matrix_encoding=dplii"
                      "$OFL"


                      The question was for WAV. See ffmpeg documentation for how to use wavpack instead of libvorbis.






                      share|improve this answer


























                        0














                        I don't know if avconv supports Dolby Pro Logic II, but ffmpeg does. I use the following command:



                        IFL=input.ac3
                        OFL=output.ogg
                        /usr/bin/ffmpeg -i "$IFL"
                        -codec:a libvorbis -qscale:a 6
                        -ac 2 -af "aresample=matrix_encoding=dplii"
                        "$OFL"


                        The question was for WAV. See ffmpeg documentation for how to use wavpack instead of libvorbis.






                        share|improve this answer
























                          0












                          0








                          0






                          I don't know if avconv supports Dolby Pro Logic II, but ffmpeg does. I use the following command:



                          IFL=input.ac3
                          OFL=output.ogg
                          /usr/bin/ffmpeg -i "$IFL"
                          -codec:a libvorbis -qscale:a 6
                          -ac 2 -af "aresample=matrix_encoding=dplii"
                          "$OFL"


                          The question was for WAV. See ffmpeg documentation for how to use wavpack instead of libvorbis.






                          share|improve this answer












                          I don't know if avconv supports Dolby Pro Logic II, but ffmpeg does. I use the following command:



                          IFL=input.ac3
                          OFL=output.ogg
                          /usr/bin/ffmpeg -i "$IFL"
                          -codec:a libvorbis -qscale:a 6
                          -ac 2 -af "aresample=matrix_encoding=dplii"
                          "$OFL"


                          The question was for WAV. See ffmpeg documentation for how to use wavpack instead of libvorbis.







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered Dec 19 '18 at 11:57









                          Hauke Hell

                          111




                          111






























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