First, we are going to play the ‘troublesome’ file in VLC (or any other player that lets you change the sync temporarily), and we will try to identify the proper sync value. I also recommend that you use VLC because both these utilities are available for multiple operating system platforms, so you can use this ‘guide’ in any of them. Note: Make sure you have downloaded and installed the latest builds of ‘MKVToolNix’ from here. Computer users, however, do not have to worry about it as popular players (VLC, MPC, PotPlayer, SMPlayer, KMPlayer …) support it. While doing so, this tool also lets you pass certain settings (sync, fps, aspect ratio …), and it is through that we can attempt to fix sync problems.īut please be aware that the only output format it supports is MKV (and a few of its variations such as ‘MKA’ for audio’, ‘MKS’ for subtitles etc.), and unlike MP4 or AVI, MKV is not supported by a lot of commercial and strictly hardware-based multimedia players. ‘MKVToolNix’ is not an encoder as you can only use it to ‘extract’ audio/video/subtitle tracks from other containers (MP4, AVI, FLV etc) and put them into the powerful and open-source MKV container. In any case, there are a few other tools that you can try while trying to fix a sync ‘malfunction’, and ‘MKVToolNix’ is one among them. ‘Avidemux’ can do very little if the input file itself has some issues (corrupted video frames etc.), but ‘Avidemux’ is also a bit buggy, so some of the blame goes toward it also. Even though I came across some of these problems, fortunately, I have been able to fix them (so far).
#Delete audio track mkvtools how to#
In a previous post I wrote about how to fix some of these synchronization issues permanently using ‘Avidemux’, but since then I have received a few complaints of ‘Avidemux’ not being able to fix those issues in some cases. Let me show you how to fix mkvtoolnix audio delay (or VLC audio delay) on a Windows computer.
Multimedia files with ‘lip-sync’ issues are not uncommon, but they rarely happen in professional environments as they take extra precautions to avoid them.
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