[FFmpeg-user] DVB subtitle track is not found by ffmpeg

[Moritz Barsnick]

On Mon, May 28, 2018 at 11:32:52 +0000, Lehtonen Tommi (KAVI) wrote:
> Stream specifier ':s' in filtergraph description [0:v][0:s]overlay[v] matches no streams.
> 
> DVB stream is not found, because it is not present at the start of
> the file. This works in those files where the DVB track is present
> from the start, but some files it goes like on and off.

This recent thread was about dvd_subtitle, but I believe it also
applies to your case:

http://lists.ffmpeg.org/pipermail/ffmpeg-user/2018-March/039201.html

In short, you need to provide sufficiently large values of
"-analyzeduration" and "-probesize".

> Finnish
> Swedish

Nice. Or rather: jättebra.

Cheers,
Moritz