[FFmpeg-trac] #3443(undetermined:new): h264_mp4toannexb filter causes artefacts

[FFmpeg]

#3443: h264_mp4toannexb filter causes artefacts
-------------------------------------+-------------------------------------
             Reporter:  eelco        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 When copying a h.264 stream to a TS file, the result does not play cleanly
 but contains several artefacts. This only happens for certain input.

 How to reproduce:
 {{{
 $ ffmpeg -i input.m4v -c:a copy -c:v copy -bsf h264_mp4toannexb copied.ts
 ffmpeg version N-61143-g64e4bd7 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Mar  7 2014 10:57:23 with Apple LLVM version 5.0
 (clang-500.2.79) (based on LLVM 3.3svn)
   configuration: --prefix=/Users/eelco/Projects/Beamer/FFmpeg/build/
 --disable-ffserver --disable-doc --extra-
 cflags='-DMACOSX_DEPLOYMENT_TARGET=10.9 -isysroot
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk
 -mmacosx-version-min=10.9
 -I/Users/eelco/Projects/Beamer/FFmpeg/build//include' --extra-
 ldflags='-isysroot
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk
 -mmacosx-version-min=10.9
 -L/Users/eelco/Projects/Beamer/FFmpeg/build//lib'
   libavutil      52. 66.101 / 52. 66.101
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 33.101 / 55. 33.101
   libavdevice    55. 11.100 / 55. 11.100
   libavfilter     4.  3.100 /  4.  3.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 18.100 /  0. 18.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.m4v':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42isomavc1
     creation_time   : 2014-03-04 16:07:22
     title           : American Hustle t03 - iFlix
     encoder         : iFlicks 2.0.2.2166
     hd_video        : 1
     media_type      : 9
     gapless_playback: 0
   Duration: 00:03:26.34, start: 0.000021, bitrate: 17699 kb/s
     Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 1920x1080 [SAR 1:1 DAR 16:9], 17535 kb/s, 23.98 fps, 23.98 tbr, 1k tbn,
 47.95 tbc (default)
     Metadata:
       creation_time   : 2014-03-04 16:07:22
     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo,
 fltp, 156 kb/s (default)
     Metadata:
       creation_time   : 2014-03-04 16:07:22
 File 'copied.ts' already exists. Overwrite ? [y/N] y
 Output #0, mpegts, to 'copied.ts':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42isomavc1
     gapless_playback: 0
     title           : American Hustle t03 - iFlix
     media_type      : 9
     hd_video        : 1
     encoder         : Lavf55.33.101
     Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080
 [SAR 1:1 DAR 16:9], q=2-31, 17535 kb/s, 23.98 fps, 90k tbn, 23.98 tbc
 (default)
     Metadata:
       creation_time   : 2014-03-04 16:07:22
     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo,
 156 kb/s (default)
     Metadata:
       creation_time   : 2014-03-04 16:07:22
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 [adts @ 0x7fdb12809800] Encoder did not produce proper pts, making some
 up.
 frame= 4947 fps=573 q=-1.0 Lsize=  481239kB time=00:03:26.33
 bitrate=19106.3kbits/s
 video:441654kB audio:3940kB subtitle:0 data:0 global headers:0kB muxing
 overhead 7.999454%
 }}}

 Note that the input file is already problematic for some players.

 ||= ''player'' =||= input =||= copied =||
 ||= ffplay  =|| incorrect framerate || artefacts and incorrect framerate
 ||
 ||= !QuickTime Player =|| no problems || artefacts ||
 ||= MplayerX =|| garbled || artefacts ||

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3443>
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