[FFmpeg-user] DVB subtitles there but not viewable

[Mike Brown]

Mike Brown <brown <at> mrvideo.vidiot.com> writes:

>> Here is the situation: the source is a BBC video 
>> from freeview, which has AAC audio, specifically 
>> AAC 6.0.  I prefer AC3 5.1
>
>(This makes no sense.)

How does this not make any sense?  AAC6.0 doesn't work with everything.
In my case, when I play it via VLC, my amp (fed via optical cable) just
considers it as stereo.  AC3-5.1 audio is correctly detected and played.
Hence the need to convert from AAC6.0 to DD5.1.

>> So, here is the CLI:

>Please provide the input file.

*****
BRN <126> ffmpeg -i BBC-AAC60-test.ts -map 0:0 -vcodec copy -map 0:1 -acodec ac3 -ab 640k -map 0:2 -scodec copy BBC-DD51-test.ts
ffmpeg version N-52837-g399f6ef Copyright (c) 2000-2013 the FFmpeg developers     built on May  7 2013 01:09:00 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-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. 29.100 / 52. 29.100
  libavcodec     55.  7.100 / 55.  7.100
  libavformat    55.  4.101 / 55.  4.101
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 63.101 /  3. 63.101
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[h264 @ 027f8680] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
[mpegts @ 027f8040] max_analyze_duration 5000000 reached at 5000000 microseconds
Input #0, mpegts, from 'BBC-AAC60-test.ts':
  Duration: 00:00:29.97, start: 0.200000, bitrate: 4829 kb/s
  Program 17920 
    Stream #0:0[0x1b59]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x1b5a](eng): Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, 5.1, fltp
    Stream #0:2[0x1b5d](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Output #0, mpegts, to 'BBC-DD51-test.ts':
  Metadata:
    encoder         : Lavf55.4.101
    Stream #0:0: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 90k tbn, 25 tbc
    Stream #0:1(eng): Audio: ac3, 48000 Hz, 5.1, fltp, 640 kb/s
    Stream #0:2(eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (aac_latm -> ac3)
  Stream #0:2 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame=  502 fps=0.0 q=-1.0 size=   13594kB time=00:00:19.92 bitrate=5590.3kbits/frame=  750 fps=0.0 q=-1.0 Lsize=   19686kB time=00:00:30.01 bitrate=5373.7kbits/s    
video:15748kB audio:2345kB subtitle:64 global headers:0kB muxing overhead 8.427144%
*****

Here is a trimmed (30 sec) version which plays in VLC, displaying the
subtitles.

	http://vidiot.com/BBC-AAC60-test.ts

As a side issue, how does one stop those annoying "frame=" lines?  I can
understand them being there for debugging reasons, but if things are OK,
they should not be there.

MB
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