[FFmpeg-devel] [PATCH]Do not set bitrate for DTS-HD Master and High Resolution

[Marcus Johnson]

This reminds me of another bug with DTS files, it estimates the file
duration by counting each frame I assume, including the HD ones resulting
in it being massively incorrect for example here's the ffmpeg output of a
DTS-HD MA file that's actually 98 minutes long



Log:

ffmpeg -i /Users/Marcus/Desktop/DTS/ThePrincessBride.dtsma

ffmpeg version N-68833-ge949e9f Copyright (c) 2000-2014 the FFmpeg
developers

  built on Mar 18 2015 07:47:46 with Apple LLVM version 6.0
(clang-600.0.57) (based on LLVM 3.5svn)

  configuration: --disable-yasm --disable-asm --disable-inline-asm
--disable-ffserver --disable-ffplay --disable-doc --disable-ffprobe

  libavutil      54. 16.100 / 54. 16.100

  libavcodec     56. 19.100 / 56. 19.100

  libavformat    56. 16.102 / 56. 16.102

  libavdevice    56.  3.100 / 56.  3.100

  libavfilter     5.  6.100 /  5.  6.100

  libswscale      3.  1.101 /  3.  1.101

  libswresample   1.  1.100 /  1.  1.100

[dts @ 0x7fe833822800] Estimating duration from bitrate, this may be
inaccurate

Input #0, dts, from '/Users/Marcus/Desktop/DTS/ThePrincessBride.dtsma':

  Duration: 04:06:57.61, start: 0.000000, bitrate: 1535 kb/s

    Stream #0:0: Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s


Instead of it saying it's about 1 hours and 30 minutes, it says it's 4
hours, and 6 minutes.


Maybe the parser should ignore the dts-hd frames, because they won't
increase the duration at all, due to the differential nature of the codec.