[FFmpeg-user] VDR recording - dvd subtitle track not decoded

[Richard F]

On 14/09/2015 15:53, Henk D. Schoneveld wrote:
> Found another solution which plays with vlc. With mkvtoolnix chose the m2v mp2 and the idx file, start muxing and it will play with vlc
> http://we.tl/QoVxcLCw7H
> shows the result for 002.vdr
Henk - thanks
I can also do similar with ffmpeg, like this, after extracting subs with
ProjectX

ffmpeg -y -fflags genpts -i 002.m2v -i 002.mp2 -fix_sub_duration -i
002.sup.idx  -c:v copy -c:a copy -c:s dvbsub 002.ts

This creates a .ts that plays very similar to yours.

Or more directly:
ffmpeg -y -fflags genpts -i 002.vdr -fix_sub_duration -i 002.sup.idx
-c:v copy -c:a copy -c:s dvbsub -map 0:0 -map 0:1 -map 1:0 002.ts

Although the timing of the subs is perhaps a second early on the more
direct one, presumably due to PTS issues (genpts is required)

I really want to avoid messing with projectX due to the time,
complexity, and possible errors

Note that:
ffmpeg -y -fflags genpts -fix_sub_duration -i 002.vdr -c:v copy -c:a
copy -c:s dvbsub 002.ts

Produces a file that claims to have dvb subtiltes in it, and ffmpeg even
reports
Stream #0:3 -> #0:2 (dvd_subtitle (dvdsub) -> dvb_subtitle (dvbsub))

But it simply doesn't work.
The clue is in the data reports
video:15362kB audio:1474kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 8.559492%

This pinpoints the exact problem. 
ffmpeg appears to know about the subs, yet doesn't handle them for
whatever reason.... which is why I'm here!