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  1. Member
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    I have two rips of the same movie published on DVD in different countries. One has a superior picture, so I would like to add a foreign language track from the other DVD to the one with better video.

    The problem is that the English DVD is 34 seconds longer than the foreign one. It doesn't have any extra scenes. It's just longer. If you play both videos side-by-side, they slowly get out of sync. They are both PAL 25.0000 FPS, so it baffles me how this happened. I tried extracting the timecodes from the shorter video, importing it in the longer video along with the audio, and remuxing, and that did not work (I got a 3-hour movie instead of a 90-minute one and it didn't play correctly).

    What's the best way to add the shorter audio track (and subtitles) to the longer video? I would prefer to avoid re-encoding the movie and keep it in the original MPEG-2 stream in a MKV container.
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  2. If it's really as you say: stretch the audio in an editor like Audacity (free). Mux the new audio with the video.
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    I read something about making the video play faster without reencoding instead of slowing the audio down, which loses quality and reportedly causes distortion. Is that an option?
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  4. Do both movies/videos start the same? The same frames at the beginning? Same movie logos titles etc... ?

    Maybe forget about the subtitle track for now, you can come back to that later.

    I think the first thing I'd do is extract both audio tracks and compare the length. Use an audio editor and stretch the shorter audio to the same length as the longer. Add the new audio to the movie, give it a try. It seems a little 'hackish' but it's certainly worth a try in the first instance.
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    Audacity crashes when importing this AC3 file. I have tried both the portable and the installable version So I'm kind of stuck.
    Last edited by Knocks; 6th Aug 2019 at 22:02.
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  6. How did you extract the AC3 from the movie?
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  7. Member
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    Rip the DVD with MakeMKV, then extract the audio track with gMKVExtractGUI.
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  8. Convert that AC3 audio to WAV audio and then open it in Audacity. It still won't work, though.

    It doesn't have any extra scenes. It's just longer.
    You know that makes no sense at all, don't you? Is the framecount identical between the two versions? No.
    I read something about making the video play faster without reencoding instead of slowing the audio down, which loses quality and reportedly causes distortion. Is that an option?
    No, not for DVD it's not an option.
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  9. Member
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    Originally Posted by manono View Post
    You know that makes no sense at all, don't you? Is the framecount identical between the two versions? No.
    I described it exactly as it is. You press play on both files and everything is the same, but one of the videos slowly starts falling behind, and by the end of the movie it's 34 seconds behind.

    I read something about making the video play faster without reencoding instead of slowing the audio down, which loses quality and reportedly causes distortion. Is that an option?
    No, not for DVD it's not an option.
    According to the MKVtoolnix documentation, you should avoid stretching audio and "shrink" video instead by telling the player to play it faster. How can I stretch or shrink an audio track?
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  10. Any chance you could post a Mediainfo dump (text mode) of both ripped files?
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  11. Originally Posted by Knocks View Post
    Audacity crashes when importing this AC3 file. I have tried both the portable and the installable version So I'm kind of stuck.
    Have you installed the ffmpeg plugin for Audacity. With that installed Audacity can import audio from almost any A/V file (no need to demux first). For example, you can just drag/drop an MKV file onto Audacity.

    https://manual.audacityteam.org/man/faq_installation_and_plug_ins.html#ffdown
    Last edited by jagabo; 6th Aug 2019 at 23:08.
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  12. Member
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    Originally Posted by jagabo View Post
    Have you installed the ffmpeg plugin for Audacity. With that installed Audacity can import audio from almost any A/V file (no need to demux first).
    It crashes with the MKV too


    Originally Posted by video.baba View Post
    Any chance you could post a Mediainfo dump (text mode) of both ripped files?
    Sure.

    The longer video:
    Code:
    Format                         : Matroska
    Format version                 : Version 4 / Version 2
    File size                      : 4.55 GiB
    Duration                       : 1 h 32 min
    Overall bit rate mode          : Variable
    Overall bit rate               : 7 059 kb/s
    Encoded date                   : UTC 2019-07-31 21:22:40
    Writing application            : mkvmerge v33.1.0 ('Primrose') 64-bit
    Writing library                : libebml v1.3.7 + libmatroska v1.5.0
    
    Video
    ID                             : 1
    Format                         : MPEG Video
    Format version                 : Version 2
    Format profile                 : Main@Main
    Format settings                : CustomMatrix
    Format settings, BVOP          : No
    Format settings, Matrix        : Custom
    Format settings, picture struc : Frame
    Codec ID                       : V_MPEG2
    Codec ID/Info                  : MPEG 1 or 2 Video
    Duration                       : 1 h 32 min
    Bit rate mode                  : Variable
    Bit rate                       : 7 057 kb/s
    Maximum bit rate               : 9 800 kb/s
    Width                          : 720 pixels
    Height                         : 576 pixels
    Display aspect ratio           : 16:9
    Frame rate mode                : Variable
    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)             : 0.681
    Time code of first frame       : 00:00:00:00
    Time code source               : Group of pictures header
    Stream size                    : 4.55 GiB (100%)
    Default                        : Yes
    Forced                         : Yes
    The shorter video
    Code:
    Format                         : Matroska
    Format version                 : Version 2
    File size                      : 4.14 GiB
    Duration                       : 1 h 31 min
    Overall bit rate mode          : Variable
    Overall bit rate               : 6 466 kb/s
    Encoded date                   : UTC 2019-08-06 22:38:55
    Writing application            : MakeMKV v1.14.4 win(x64-release)
    Writing library                : libmakemkv v1.14.4 (1.3.5/1.4.7) win(x64-release)
    
    Video
    ID                             : 1
    ID in the original source medi : 224 (0xE0)
    Format                         : MPEG Video
    Format version                 : Version 2
    Format profile                 : Main@Main
    Format settings                : CustomMatrix / BVOP
    Format settings, BVOP          : Yes
    Format settings, Matrix        : Custom
    Format settings, picture struc : Frame
    Codec ID                       : V_MPEG2
    Codec ID/Info                  : MPEG 1 or 2 Video
    Duration                       : 1 h 31 min
    Bit rate mode                  : Variable
    Bit rate                       : 5 553 kb/s
    Maximum bit rate               : 8 000 kb/s
    Width                          : 720 pixels
    Height                         : 576 pixels
    Display aspect ratio           : 4:3
    Frame rate mode                : Constant
    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)             : 0.536
    Time code of first frame       : 00:59:59:00
    Time code source               : Group of pictures header
    Stream size                    : 3.56 GiB (86%)
    Default                        : No
    Forced                         : No
    Original source medium         : DVD-Video
    
    Audio #1
    ID                             : 2
    ID in the original source medi : 189 (0xBD)128 (0x80)
    Format                         : AC-3
    Format/Info                    : Audio Coding 3
    Codec ID                       : A_AC3
    Duration                       : 1 h 31 min
    Bit rate                       : 448 kb/s
    Channel(s)                     : 6 channels
    Sampling rate                  : 48.0 kHz
    Frame rate                     : 31.250 FPS (1536 SPF)
    Compression mode               : Lossy
    Stream size                    : 293 MiB (7%)
    Title                          : Surround 5.1
    Default                        : Yes
    Forced                         : No
    Original source medium         : DVD-Video
    
    Audio #2
    ID                             : 3
    ID in the original source medi : 189 (0xBD)129 (0x81)
    Format                         : AC-3
    Format/Info                    : Audio Coding 3
    Format settings, Endianness    : Big
    Codec ID                       : A_AC3
    Duration                       : 1 h 31 min
    Bit rate mode                  : Constant
    Bit rate                       : 224 kb/s
    Channel(s)                     : 2 channels
    Channel positions              : Front: L R
    Sampling rate                  : 48.0 kHz
    Frame rate                     : 31.250 FPS (1536 SPF)
    Bit depth                      : 16 bits
    Compression mode               : Lossy
    Stream size                    : 147 MiB (3%)
    Title                          : Stereo
    Service kind                   : Complete Main
    Default                        : No
    Forced                         : No
    Original source medium         : DVD-Video
    
    Audio #3
    ID                             : 4
    ID in the original source medi : 189 (0xBD)130 (0x82)
    Format                         : AC-3
    Format/Info                    : Audio Coding 3
    Codec ID                       : A_AC3
    Duration                       : 1 h 31 min
    Bit rate                       : 224 kb/s
    Channel(s)                     : 2 channels
    Sampling rate                  : 48.0 kHz
    Frame rate                     : 31.250 FPS (1536 SPF)
    Compression mode               : Lossy
    Stream size                    : 147 MiB (3%)
    Title                          : Stereo
    Default                        : No
    Forced                         : No
    Original source medium         : DVD-Video
    
    Text #1
    ID                             : 5
    ID in the original source medi : 189 (0xBD)32 (0x20)
    Format                         : VobSub
    Codec ID                       : S_VOBSUB
    Codec ID/Info                  : Picture based subtitle format used on DVDs
    Duration                       : 1 h 30 min
    Bit rate                       : 4 231 b/s
    Count of elements              : 832
    Stream size                    : 2.74 MiB (0%)
    Default                        : Yes
    Forced                         : No
    Original source medium         : DVD-Video
    
    Text #2
    ID                             : 6
    ID in the original source medi : 189 (0xBD)33 (0x21)
    Format                         : VobSub
    Codec ID                       : S_VOBSUB
    Codec ID/Info                  : Picture based subtitle format used on DVDs
    Duration                       : 1 h 31 min
    Bit rate                       : 6 875 b/s
    Count of elements              : 1397
    Stream size                    : 4.49 MiB (0%)
    Default                        : No
    Forced                         : No
    Original source medium         : DVD-Video
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