[FFmpeg-user] Warning "Starting new cluster due to timestamp" on muxing two input streams and resulting movie with muted audio at some locations

Georgi D. Sotirov gdsotirov at dir.bg
Mon Apr 24 10:58:32 EEST 2017

Anyone? Meanwhile I've done the muxing with mkvmerge from MKVToolNix 
<https://mkvtoolnix.download/> package without any problem and muxed 
other movies with FFmpeg successfully.

Georgi D. Sotirov

On 17/04/2017 at 12:23, Georgi D. Sotirov wrote:
> 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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