[FFmpeg-trac] #7117(avcodec:open): DVB subtitles render incorrectly

[FFmpeg]

#7117: DVB subtitles render incorrectly
------------------------------------+-----------------------------------
             Reporter:  leoenc      |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  dvbsub      |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
------------------------------------+-----------------------------------

Comment (by leoenc):

 Replying to [comment:2 cehoyos]:
 > Can you confirm that the issue is not reproducible with old (!) FFplay?

 I can confirm. Tested with a build from 2013 and the output looks perfect.

 {{{
 ffplay_old.exe out.ts
 ffplay version N-54161-gc329713 Copyright (c) 2003-2013 the FFmpeg
 developers
   built on Jun 23 2013 14:25:36 with gcc 4.7.3 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray
 --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc
 --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
 librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex
 --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-
 libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264
 --enable-libxavs --enable-libxvid --enable-zlib
   libavutil      52. 37.101 / 52. 37.101
   libavcodec     55. 16.100 / 55. 16.100
   libavformat    55.  9.100 / 55.  9.100
   libavdevice    55.  2.100 / 55.  2.100
   libavfilter     3. 77.101 /  3. 77.101
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 max_analyze_duration 5000000 reached at 5000000 microsecondsf=0/0
 Input #0, mpegts, from 'out.ts':
   Duration: 00:00:29.96, start: 1.440000, bitrate: 774 kb/s
   Program 1
     Metadata:
       service_name    : Service01
       service_provider: FFmpeg
     Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
 yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x101](und): Subtitle: dvb_subtitle ([6][0][0][0] /
 0x0006)
   24.74 M-V: -0.028 fd=   0 aq=    0KB vq=  693KB sq=    0B f=0/0
 }}}

 BTW, better use some color for the background when testing, so the
 subtitle border is visible, e.g.:

 {{{
 ffmpeg -f lavfi -i color=green:s=hd1080 -fix_sub_duration -i subtitles.sup
 -scodec dvbsub -qscale 2 -mbd 2 -t 30 out.ts
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7117#comment:4>
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