[FFmpeg-user] Issue with disposition "forced" for a subtitles stream (mov_tex) in a mp4 container

[Andrea Giudiceandrea]

Il 29/11/2020 14:14, Andrea Giudiceandrea ha scritto:
> Dear all,
> I'm using ffmpeg (4.3.1-2020-11-19-full_build-www.gyan.dev) on Windows 
> 7 to mux video, audio and subtitles streams in a mp4 container. I'd 
> like to force the subtitles stream to be displayed by default, so I 
> use the "-disposition:s:0 forced" option.
> However ffmpeg fails to properly set the "disposition" option for the 
> subtitles stream to "forced" so I need to manually enable the subtitle 
> when the video is played by VLC media player 3.0.11.

Hi all,
since no one has provided advice on how to fix the problem, I assume it 
is a bug and so I will report it in the appropriate bug tracker.

Regards.

Andrea