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  1. Member
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    May 2020
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    I have many MKV files with video at 23.976fps but I believe the subs are at 29.97 fps because occasionally a line of dialogue will fail to display (and that's what the original video frame rate was before my detelecine and decimate). Is there a way to convert the subs to the correct frame rate via the command line?
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  2. You could use Subtitle Edit with the optional parameter /fps

    Code:
    Subtitle Edit 3.5.14 - Batch converter
    
    - Usage: SubtitleEdit /convert <pattern> <name-of-format-without-spaces> [<optio
    nal-parameters>]
    
        pattern:
            one or more file name patterns separated by commas
            relative patterns are relative to /inputfolder if specified
        optional-parameters:
            /offset:hh:mm:ss:ms
            /fps:<frame rate>
            /targetfps:<frame rate>
            /encoding:<encoding name>
            /pac-codepage:<code page>
            /track-number:<comma separated track number list>
            /resolution:<width>x<height>
            /inputfolder:<folder name>
            /outputfolder:<folder name>
            /overwrite
            /forcedonly
            /multiplereplace:<comma separated file name list> ('.' represents the de
    fault replace rules)
            /multiplereplace (equivalent to /multiplereplace:.)
          The following operations are applied in command line order
          from left to right, and can be specified multiple times.
            /ApplyDurationLimits
            /FixCommonErrors
            /RemoveLineBreaks
            /MergeSameTimeCodes
            /MergeSameTexts
            /MergeShortLines
            /ReverseRtlStartEnd
            /RemoveFormatting
            /RemoveTextForHI
            /RedoCasing
    
        Example: SubtitleEdit /convert *.srt sami
        Show this usage message: SubtitleEdit /help
        List available formats: SubtitleEdit /help formats
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  3. Originally Posted by zapp7 View Post
    ...and that's what the original video frame rate was before my detelecine and decimate
    An IVTC doesn't change the length of a video file. Therefore, changing the sub timings will do nothing but ruin them and won't solve whatever problem it is you have.

    Are those subs from the same source as the audio and video? A DVD perhaps? Or were they downloaded separately?
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  4. Member
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    Originally Posted by manono View Post
    Originally Posted by zapp7 View Post
    ...and that's what the original video frame rate was before my detelecine and decimate
    An IVTC doesn't change the length of a video file. Therefore, changing the sub timings will do nothing but ruin them and won't solve whatever problem it is you have.

    Are those subs from the same source as the audio and video? A DVD perhaps? Or were they downloaded separately?
    Yeah, everything is from the same DVD. The IVTC video is originally from a VOB file while the audio and subs are from a .mkv ripped from the DVD with MakeMKV. They were muxed together with mkvmerge. Maybe getting the subs from the VOB as well would solve the missing lines issue?
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