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  1. Member darkzero297's Avatar
    Join Date: Dec 2006
    Location: Canada
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    I had an H264 MKV and it had a variable frame rate. When I tried opening it with Virtual Dub Mod it had about 10 MILLION errors about frame forwarding... something. I managed to convert it to AVI by using a combination of programs (MKVExtract, Mediacoder for the audio, AVC2AVI and Virtual Dub Mod to put it together) but when I play it sometimes the animation leaves the audio by about half a second and then it comes back and is in sync with it again. I can only assume it is because of the variable frame rate.

    Is there anything I can do about this?
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  2. Hi-
    Is there anything I can do about this?
    Yes, learn some AviSynth:
    convertfps = false (in v2.56): It turns variable framerate video (vfr) into constant framerate video (cfr) by adding frames. This is useful when you want to open vfr video (for example mkv, rmvb, mp4, asf or wmv with hybrid video) in AviSynth. It is most useful when the fps parameter is set to the least common multiple of the component vfr rates, e.g. 120 or 119.880.
    http://avisynth.org/mediawiki/DirectShowSource
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