Hello,

I'm having the warning "/Starting new cluster due to timestamp/" when trying to mux the video and the audio from two (matroska) input streams by just copying the video from the first and the audio from the second them (i.e. without re-encoding). The resulting movie is scrambled - the video is OK, but the audio is inconsistent - it's muted in random locations. It's the same problem explained here <http://ffmpeg.gusari.org/viewtopic.php?f=11&t=2713> and I reproduce it with Sintel movie <https://durian.blender.org/download/> as given in the example. The strange is that I've done the same operation many times in the past and I'm not sure why I have this warning just now as in the source it seem to have been introduced almost 3 years ago (see commit 7923aa0fba6b7b55ebbe1af8b7620060f36a1133 <https://github.com/FFmpeg/FFmpeg/commit/7923aa0fba6b7b55ebbe1af8b7620060f36a1133>). Thus, I normally receive the same warning with newly released FFmpeg 3.3 as well as with previous 3.2.4 version.

So is there any way to solve this problem, avoid the warning and produce movie without muted sound?


Best regards,
--
Georgi D. Sotirov
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