Ginoxi wrote:In which scenarios can the audio be longer or shorter than the video, if they come from the same source?Īn NTSC film frame is 41.708333. mkvmerge is one way to re-arrange the tracks to put the correct ones "first". The SECOND audio track and the SECOND subtitle track are the English dub with just the signs/writing (aka "forced") subtitles, which SHOULD be the default. Many such players do NOT take into account track flags for "default", and simply play the first audio track and first subtitle track they find.Ī series I got yesterday has Japanese audio and full subtitles as the first two tracks, so that's what I'd get if I play the raw MKV files generated by MakeMKV. One common one is when you want to play back a subtitled/dubbed movie on a hardware player. But not all of them are things "regular users" need to do. Of course, sometimes the time stamps are wildly wrong - over on the handbrake forum, someone posted a log from a rip where the audio time stamps had 5 to 15 minute discrepancies, not just a few milliseconds here and there.Īs to why you would use mkvtoolnix, there are a LOT of reasons. A lot of players out there do not check the time stamps between audio and video streams, so they can become further and further out of sync as playback continues. Video frame rates are not an exact match for film frame rates, so it easy for small discrepancies to creep in during disk mastering. In which scenarios can the audio be longer or shorter than the video, if they come from the same source? Actually, MKVMerge's competitor is MP4Box (or even worse, iTunes!) To be honest, I tend to think EAC3To, DVDFab or AnyDVD are more of the competitors to MakeMKV than MKVMerge, MKVMerge and MakeMKV are more of a complement to each other. Ripping a Blu Ray or DVD directly with MKVMerge is asking for trouble, so as far as I'm concerned the best method is to rip with MakeMKV, then remux with MKVMerge. Basically, MakeMKV makes for neater tracks, nicely synced and neatly organised, yet MKVMerge is the superior Matroska muxer, assuming the tracks it's muxing have been pre-processed in some way. However, if you remux an MKV made by MakeMKV using MKVMerge, the resulting file will come out smaller. It's incapable of re-encoding anything into anything, it just dumbly muxes tracks from one container to another wihtout alteration. MKVMerge makes no attempt to sync audio, if the audio is a little shorter or longer than the video it will leave a gap in whichever is the shorter. MakeMKV decrypts optical discs, re-encodes audio, makes sure video tracks are in sync with the audio and are fully constant frame rate with no gaps.
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