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Thread: Is there a way to change the order of sound tracks in an mpeg file?

  1. #1
    Join Date
    Feb 2009
    Location
    Spain
    Posts
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    Default Is there a way to change the order of sound tracks in an mpeg file?

    Hi,

    I have a digital recording device, to save to file a TV program (Siemens
    Gigaset M740AV). Sometimes I process the recording to remove the
    "interruptions" (using cridmanager and projectX). The result is an mpeg
    file:

    Code:
    Format                                   : MPEG-PS
    File size                                : 719 MiB
    Duration                                 : 42mn 59s
    Overall bit rate mode                    : Variable
    Overall bit rate                         : 2 337 Kbps
    
    Video
    ID                                       : 224 (0xE0)
    Format                                   : MPEG Video
    Format version                           : Version 2
    Format profile                           : Main@Main
    Format settings, BVOP                    : Yes
    Format settings, Matrix                  : Custom
    Format settings, GOP                     : Variable
    Duration                                 : 42mn 58s
    Bit rate mode                            : Variable
    Bit rate                                 : 2 003 Kbps
    Maximum bit rate                         : 15.0 Mbps
    Width                                    : 720 pixels
    Height                                   : 576 pixels
    Display aspect ratio                     : 4:3
    Frame rate                               : 25.000 fps
    Standard                                 : PAL
    Color space                              : YUV
    Chroma subsampling                       : 4:2:0
    Bit depth                                : 8 bits
    Scan type                                : Interlaced
    Scan order                               : Top Field First
    Compression mode                         : Lossy
    Bits/(Pixel*Frame)                       : 0.193
    Stream size                              : 615 MiB (86%)
    
    
    Audio #1
    ID                                       : 192 (0xC0)
    Format                                   : MPEG Audio
    Format version                           : Version 1
    Format profile                           : Layer 2
    Duration                                 : 42mn 59s
    Bit rate mode                            : Constant
    Bit rate                                 : 96.0 Kbps
    Channel(s)                               : 2 channels
    Sampling rate                            : 48.0 KHz
    Compression mode                         : Lossy
    Delay relative to video                  : -1s 609ms
    Stream size                              : 29.5 MiB (4%)
    
    Audio #2
    ID                                       : 193 (0xC1)
    Format                                   : MPEG Audio
    Format version                           : Version 1
    Format profile                           : Layer 2
    Duration                                 : 42mn 59s
    Bit rate mode                            : Constant
    Bit rate                                 : 128 Kbps
    Channel(s)                               : 2 channels
    Sampling rate                            : 48.0 KHz
    Compression mode                         : Lossy
    Delay relative to video                  : -1s 609ms
    Stream size                              : 39.4 MiB (5%)
    
    Audio #3
    ID                                       : 194 (0xC2)
    Format                                   : MPEG Audio
    Format version                           : Version 1
    Format profile                           : Layer 2
    Duration                                 : 42mn 59s
    Bit rate mode                            : Constant
    Bit rate                                 : 64.0 Kbps
    Channel(s)                               : 1 channel
    Sampling rate                            : 48.0 KHz
    Compression mode                         : Lossy
    Delay relative to video                  : -1s 489ms
    Stream size                              : 19.7 MiB (3%)
    Audio 1 is English, Audio 2 is Spanish, 3 doesn't play.

    Problem #1: the audio channels are reversed to what they play in the TV,
    meaning that if I play it on the the TV it plays in English. I want it
    in Spanish.

    Problem #2: The TV refuses to allow me to choose language.

    Thus, to watch it in Spanish, I have to do so on the computer, meaning I
    can't use the computer for much else.


    What I want to know is if it is possible to relabel track 2 as track 1,
    without any kind of recoding. Or change the default sound channel somehow.

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 12.3 x86_64 "Dartmouth" at Telcontar)

  2. #2
    Join Date
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    Posts
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    Default Re: Is there a way to change the order of sound tracks in an mpegfile?

    Carlos E. R. wrote:

    > What I want to know is if it is possible to relabel track 2 as track 1,
    > without any kind of recoding. Or change the default sound channel somehow.
    >

    Create video with one audio channel:-
    you can try something like this
    http://ubuntuforums.org/showthread.p...79#post7212079
    --
    GNOME 3.10.1
    openSUSE 13.1 (Bottle) (x86_64) 64-bit
    Kernel Linux 3.11.6-4-desktop

  3. #3
    Join Date
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    Location
    Spain
    Posts
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    Default Re: Is there a way to change the order of sound tracks in an mpegfile?

    On 2013-12-04 01:53, vazhavandan wrote:
    > Carlos E. R. wrote:
    >
    >> What I want to know is if it is possible to relabel track 2 as track 1,
    >> without any kind of recoding. Or change the default sound channel
    >> somehow.
    >>

    > Create video with one audio channel:-
    > you can try something like this
    > http://ubuntuforums.org/showthread.p...79#post7212079



    Interesting.

    But it doesn't quite work. I did:

    Code:
    
    > ffmpeg -i p.mpg -map 0:1 -map 0:2 -acodec copy -vcodec copy p2.mpg
    The source had 781282287 bytes, the destination got 67594240. There is
    no video, and the audio has the channels in the same order, ie, it plays
    in English.

    This other version:

    Code:
    
    >  ffmpeg -i p.mpg -map 0:2 -map 0:1 -acodec copy -vcodec copy p2.mpg
    gets the audio right, but still no video; I thought that could be the
    "-vcodec copy" thing.

    Got it:

    Code:
    
    > ffmpeg -i p.mpg -map 0:2 -map 0:1 -acodec copy -map 0:0 -vcodec copy p2.mpg
    This is the key for the mapping:

    Code:
    
    > File 'p2.mpg' already exists. Overwrite ? [y/N] y
    > Output #0, mpeg, to 'p2.mpg':
    >   Metadata:
    >     encoder         : Lavf55.19.104
    >     Stream #0:0: Audio: mp2, 48000 Hz, stereo, 128 kb/s
    >     Stream #0:1: Audio: mp2, 48000 Hz, stereo, 96 kb/s
    >     Stream #0:2: Video: mpeg2video, yuv420p, 720x576 [SAR 16:15 DAR 4:3], q=2-31, max. 15000 kb/s, 25 fps, 90k tbn, 25 tbc
    > Stream mapping:
    >   Stream #0:2 -> #0:0 (copy)
    >   Stream #0:1 -> #0:1 (copy)
    >   Stream #0:0 -> #0:2 (copy)

    Good, thanks!!

    Last time I tried this it was a total failure. I used avidemux, I think.
    I can script this to make it easy to use.


    --
    Cheers / Saludos,

    Carlos E. R.
    (from 12.3 x86_64 "Dartmouth" at Telcontar)

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