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How to Convert H.264 MKV Files to MP4 Without ... - iClarified
https://www.iclarified.com/21199/how-to-convert-h264-mkv-files-to-mp4-without-reencoding-windows#:~:text=Drag%20the%20MP4Box.exe%20file%20into%20the%20command%20prompt,or%20your%20audio%20will%20be%20out%20of%20sync.
Audio gradually goes out of sync when playing files ...
https://github.com/gpac/gpac/issues/287
$ MP4Box -add in.ts out.mp4 A problem occurs with files obtained from a specific source. After being repackaged, the audio gradually goes out of sync. At the beginning audio is in sync, but after 5-10 minutes it's out of sync by one second. The problem is present when files are played in smart TV media players, but not VLC, MPlayer etc.
windows - Why the audio of my mp4 file is going out of ...
https://stackoverflow.com/questions/51108865/why-the-audio-of-my-mp4-file-is-going-out-of-async
The problem is that the final.mp4 audio is out of sync. It starts good but with time it goes out of sync with time. I run this command: MP4Box -info 010004470063PE-10022017083824-2_MultiMedia--1.mp4. and I discover that the estimated time of both streams are different: output of command.
Video/audio out of sync during play · Issue #996 · gpac ...
https://github.com/gpac/gpac/issues/996
Adding the repetitions of the loop on MP4Box as -dash-live the delay increases (only on safari) and becomes noticeble after some repetitions (audio before video). Resample audio stream to match the timestamp during concat process with aresample ffmpeg audio filter fix the issue. Now it is in sync with all common browsers!
How do I merge MP4 files without audio going out of sync?
https://superuser.com/questions/76228/how-do-i-merge-mp4-files-without-audio-going-out-of-sync
Select the first file you want to join, and then click in "Append" to add the next files. You could select several options but just to try click tell it where you want the new file and click "Start muxing". It should generate a MKV file, play it and look if the audio is out of sync.
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