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Any Help please with mixing audio and video track together for MKV file please

Discussion in 'Other video questions' started by biggebruv, Nov 16, 2011.

  1. biggebruv

    biggebruv Regular member

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    I have two seperate mkv files of a movie one with sound and one with video
    however video is longer
    and i wanna sync them both together in MKVMERGE ill give details of the files
    Iv already done a few but its usually out of sync by about 2 maybe 3 mintues and has never been right

    ac3 track - 1:20:23
    codec - A52 Audio (aka AC3)(a52)
    channels - stereo
    samplerate - 48000Hz
    bitrate - 192kb/s

    video track - 1:22:30
    codec - H264 - MPEG4 AVC (part10)(avc1)
    framrate - 23.976215

    The video file is a completely different source from the audio but there exactly the same films but im assuming the video is a different format, region or whatever hence the extra two mintues they are exactly the same noting is different
    The Film had a foriegn language so i took the english from a DVD and id like to attach it to this can it be done???

    any help? I would be really gratefull
     
    Last edited: Nov 16, 2011
  2. attar

    attar Senior member

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    You can stretch the AC3 using the likes of Audacity.
    Effect > Change Tempo
    It does it without changing pitch.
    You should verify that the required plugins are installed by clicking:Edit > Preferences > Libraries


    http://www.videohelp.com/tools/Audacity
     
    Last edited: Nov 16, 2011
  3. biggebruv

    biggebruv Regular member

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    thank you so much ill try that now
     
  4. biggebruv

    biggebruv Regular member

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    I tried that but I need mkvmerge to merge the files and I have both tracks at the same length now.

    I dropped the framerate of the video to 25.000 and now both tracks are at the same lenth however there still not in proper synce sadly
     
    Last edited: Nov 16, 2011
  5. davexnet

    davexnet Active member

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    If the synch is out the same amount at the beginning as well as the end,
    perhaps you can adjust the "offset" in the merge program.

    If it's in synch at the beginning but get's steadily worse, then the length of
    the audio needs to be adjusted still.
     

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