[FFmpeg-user] DVD-Subtitles in matroska container converted by ffmpeg won't disappear playing with vlc

[Bernd Butscheidt]

>________________________________
> From: Nicolas George <george at nsup.org>
>To: FFmpeg user questions <ffmpeg-user at ffmpeg.org> 
>Sent: Wednesday, March 26, 2014 3:45 PM
>Subject: Re: [FFmpeg-user] DVD-Subtitles in matroska container converted by ffmpeg won't disappear playing with vlc
> 
>
>To transcode dvbsub into dvdsub, -fix_sub_duration is indeed required,
>because dvbsub do not have a duration in the packets and dvdsub need one.
>

Thank you very much for your explanation and confirmation. 


>I am a bit surprised it prevents the subtitles from showing, though, I see
>no reason for that since the file is locally valid.


To my observations, Without -fix_xub_duration Vlc shows every subtitle, but no subtitle will disappear again. So after a short time you have quite a mess of them.

Adding -fix_sub_duration as input file option seems to provide a sensible duration for every subtitle to be shown. So vlc shows only one subtitle after the other. 


Kind regards
Bernd