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I want to fix audio sync problems. I looked in MPC-HC that audio should be delayed by 2750 milleseconds.

The following two commands

ffmpeg -itsoffset +2.750 -i MyFile.avi -vcodec copy -ss 00:28:32 -to 00:29:30 MyFile2.avi
ffmpeg -itsoffset -2.750 -i MyFile.avi -vcodec copy -ss 00:28:32 -to 00:29:30 MyFile2.avi

give exactly the same result (video and audio non synchronized and shifted equally).

I.e. -itsoffset option does not work.

Why?

Dims
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  • the option `-itsoffset` applies to all streams of the following input file. So it delays both video and audio. See the above (duplicate) question. – wimh Aug 06 '15 at 12:09

1 Answers1

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If your video codec is using B-Frames it could cause this. You might have to end up transcoding to something that uses all I-Frames, for example

-c:v huffyuv
-c:v ffv1
-c:v ffvhuff
Zombo
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