id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1277	Subtitle (hdmv_pgs_subtitle) conversion fails	bakhshian		"I need to convert the format of the subtitle stream of a movie so my device can play it.
Here is the list of all existing streams : 

{{{
    Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x816 [SAR 1:1 DAR 40:17], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Stream #0:1(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), s16, 1536 kb/s (default)
    Metadata:
      title           : 3/2+1
    Stream #0:2(eng): Subtitle: hdmv_pgs_subtitle (default)
    Stream #0:3(ger): Subtitle: hdmv_pgs_subtitle
    Stream #0:4(ger): Subtitle: hdmv_pgs_subtitle
    Stream #0:5(ger): Subtitle: hdmv_pgs_subtitle
    Stream #0:6(ger): Subtitle: hdmv_pgs_subtitle
}}}

I want to keep only the English subtitle and convert it too. The available codecs are :

{{{
> ffmpeg -codecs | grep sub
 DES    ass             Advanced SubStation Alpha subtitle
 DES    dvbsub          DVB subtitles
 DES    dvdsub          DVD subtitles
 D S    pgssub          HDMV Presentation Graphic Stream subtitles
 DES    srt             SubRip subtitle
 DES    xsub            DivX subtitles (XSUB)
}}}

I choose dvdsub as the new format and try to run ffmpeg command with the following arguments :

{{{
ffmpeg -i in.mkv -scodec dvdsub -vcodec copy -acodec copy out.mkv
}}}

It starts running, but after a while ( I think when it reaches the first frame with subtitle ) crashes. Here you can see the messages :

{{{
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #0:2 -> #0:2 (pgssub -> dvdsub)
Press [q] to stop, [?] for help
Subtitle encoding failed1.0 size=  182919kB time=00:00:00.00 bitrate=   0.0kbits/s 
}}}

The interesting point is that ffplay and mplayer both can play the input file and they show the subtitle properly.

Here is the output of ffmpeg -version command :

{{{
ffmpeg version 0.10.2-4:0.10.2-0ubuntu0jon1~oneiric1
built on Mar 18 2012 11:07:55 with gcc 4.6.1
configuration: --extra-version='4:0.10.2-0ubuntu0jon1~oneiric1' --arch=amd64 --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --disable-stripping --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-libfreetype --enable-vaapi --enable-frei0r --enable-gpl --enable-postproc --enable-x11grab --enable-librtmp --enable-libvo-aacenc --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-libdc1394 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
libavutil      51. 35.100 / 51. 35.100
libavcodec     53. 61.100 / 53. 61.100
libavformat    53. 32.100 / 53. 32.100
libavdevice    53.  4.100 / 53.  4.100
libavfilter     2. 61.100 /  2. 61.100
libswscale      2.  1.100 /  2.  1.100
libswresample   0.  6.100 /  0.  6.100
libpostproc    52.  0.100 / 52.  0.100
}}}"	defect	closed	normal	undetermined	git-master	fixed	dvdsub				1	0