[FFmpeg-trac] #1277(FFmpeg:new): Subtitle conversion fails

[FFmpeg]

#1277: Subtitle conversion fails
-------------------------------------+-------------------------------------
             Reporter:  bakhshian    |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:  FFmpeg       |                  Version:  0.10.2
             Keywords:  pgssub ->    |               Blocked By:
  dvdsub                             |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 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

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1277>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker