[FFmpeg-trac] #4754(avcodec:new): dvbsub samples look very ugly

[FFmpeg]

#4754: dvbsub samples look very ugly
--------------------------------------+---------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avcodec
                Version:  git-master  |               Keywords:  dvbsub
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+---------------------------------
 http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket4752/
 The subtitles in the sample from ticket #4752 look fine with vlc and
 probably readable with MPlayer but bad (and possibly unreadable) with
 current FFmpeg.
 I also wonder if the warnings are correct or not.
 {{{
 $ ffmpeg -canvas_size pal -i dump_dvbsubtitles.mp4 -filter_complex
 [0:2]scale=hd1080,[0:0]overlay -qscale 2 out.avi
 ffmpeg version N-74271-g087c0a0 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 30.100 / 54. 30.100
   libavcodec     56. 57.100 / 56. 57.100
   libavformat    56. 40.101 / 56. 40.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 32.100 /  5. 32.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.101 /  1.  2.101
   libpostproc    53.  3.100 / 53.  3.100
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x363c340] decode_slice_header error
 [h264 @ 0x363c340] no frame!
 [h264 @ 0x363c340] mmco: unref short failure
     Last message repeated 1 times
 [h264 @ 0x363c340] number of reference frames (0+4) exceeds max (3;
 probably corrupt input), discarding one
 [NULL @ 0x363e500] start time for stream 3 is not set in
 estimate_timings_from_pts
 [mpegts @ 0x3638360] PES packet size mismatch
 Input #0, mpegts, from 'dump_dvbsubtitles.mp4':
   Duration: 00:01:05.45, start: 57364.369689, bitrate: 6849 kb/s
   Program 1163
     Stream #0:0[0xcb]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn,
 50 tbc
     Stream #0:1[0x193](eng): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz,
 5.1(side), fltp, 448 kb/s
     Stream #0:2[0x25b](ara): Subtitle: dvb_subtitle ([6][0][0][0] /
 0x0006)
     Stream #0:3[0x265](eng): Subtitle: dvb_subtitle ([6][0][0][0] /
 0x0006)
 Please use -q:a or -q:v, -qscale is ambiguous
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf56.40.101
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1920x1080 [SAR
 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
     Metadata:
       encoder         : Lavc56.57.100 mpeg4
     Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz,
 5.1(side), fltp, 448 kb/s
     Metadata:
       encoder         : Lavc56.57.100 ac3
 Stream mapping:
   Stream #0:0 (h264) -> overlay:main (graph 0)
   Stream #0:2 (dvbsub) -> scale (graph 0)
   overlay (graph 0) -> Stream #0:0 (mpeg4)
   Stream #0:1 -> #0:1 (ac3 (native) -> ac3 (native))
 Press [q] to stop, [?] for help
 [h264 @ 0x4714f60] reference picture missing during reorder
 [h264 @ 0x4714f60] Missing reference picture, default is 2147483647
 [h264 @ 0x475c6e0] mmco: unref short failure
     Last message repeated 1 times
 [h264 @ 0x475c6e0] number of reference frames (0+4) exceeds max (3;
 probably corrupt input), discarding one
 [h264 @ 0x475c6e0] reference picture missing during reorder
 [h264 @ 0x475c6e0] Missing reference picture, default is 65496
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
     Last message repeated 1 times
 [dvbsub @ 0x363fba0] Invalid clut depth 0x0!
 [mpegts @ 0x3638360] PES packet size mismatche=00:01:03.84
 bitrate=13478.4kbits/s
 [ac3 @ 0x363f540] incomplete frame
 [h264 @ 0x47eb5e0] error while decoding MB 84 66, bytestream -20
 frame= 1602 fps= 53 q=2.0 Lsize=  106323kB time=00:01:05.36
 bitrate=13326.1kbits/s
 video:102700kB audio:3526kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.090437%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4754>
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