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• avformat/oggdec : Fix integer overflow with invalid pts

  3 août 2016, par Michael Niedermayer

  avformat/oggdec : Fix integer overflow with invalid pts
  If negative pts are possible for some codecs in ogg then the code needs to be
  
  changed to use signed values.
  Found-by : Thomas Guilbert <tguilbert@google.com>
  
  Fixes : clusterfuzz_usan-2016-08-02
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/oggdec.h

• libavcodec/dnxhd : Enable 12-bit DNxHR support.

  2 août 2016, par Steven Robertson

  libavcodec/dnxhd : Enable 12-bit DNxHR support.
  10- and 12-bit DNxHR use the same DC coefficient decoding process and
  
  VLC table, just with a different shift value. From SMPTE 2019-1:2016,
  
  8.2.4 DC Coefficient Decoding :
  "For 8-bit video sampling, the maximum value of η=11 and for
  
  10-/12-bit video sampling, the maximum value of η=13."
  A sample file will be uploaded to show that with this patch, things
  
  decode correctly :
  
  dnxhr_hqx_12bit_1080p_smpte_colorbars_davinci_resolve.mov
  Signed-off-by : Steven Robertson <steven@strobe.cc>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/dnxhddec.c

• ffmpeg concat : 2nd video stream frozen, no image

  31 juillet 2016, par Azevedo

  I’m trying to concatenate two video streams with the same econding into one :

  ffmpeg -y -f concat -i parts.txt -c copy join.mkv

  parts.txt

  file part1.mkv
  
  file part2.mkv

  ffmpeg will concatenate them but the playback (any player) gives a still image if the playing position corresponds to the 2nd part.
  I tried to switch part1.mkv and part2.mkv to see the results.
  The 1st part (whichever part1 or part2) will play normally but when I seek the playback to the time corresponding the 2nd part the image won’t show, only the audio plays.

  
  
  What happens if i seek the playback to the 2nd part :
  

  UPDATE :
  FULL CONSOLE OUTPUT FOR ffmpeg -y -f concat -i parts.txt -c copy episode.mkv

  ffmpeg version N-81118-gfb91850 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 50.100 / 57. 50.100
  
    libavformat    57. 44.100 / 57. 44.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 49.100 /  6. 49.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [matroska,webm @ 000000000242bd40] Auto-inserting h264_mp4toannexb bitstream filter
  
  Input #0, concat, from 'parts.txt':
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuv420p(tv, bt709), 1280x720, SAR 1:1 DAR 16:9, 23.97 fps, 23.97 tbr, 1k tbn, 47.95 tbc
  
      Metadata:
  
        BPS             : 1023638
  
        BPS-eng         : 1023638
  
        _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  
        DURATION-eng    : 00:23:17.980000000
  
        NUMBER_OF_FRAMES: 33518
  
        NUMBER_OF_FRAMES-eng: 33518
  
        NUMBER_OF_BYTES : 178878340
  
        NUMBER_OF_BYTES-eng: 178878340
  
        _STATISTICS_WRITING_APP: mkvmerge v9.3.1 ('Mask Machine') 64bit
  
        _STATISTICS_WRITING_APP-eng: mkvmerge v9.3.1 ('Mask Machine') 64bit
  
        _STATISTICS_WRITING_DATE_UTC: 2016-07-30 17:28:29
  
        _STATISTICS_WRITING_DATE_UTC-eng: 2016-07-30 17:28:29
  
        _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  
        DURATION        : 00:22:13.164000000
  
  [matroska @ 0000000000e7c920] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Output #0, matroska, to 'episode.mkv':
  
    Metadata:
  
      encoder         : Lavf57.44.100
  
      Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 23.97 fps, 23.97 tbr, 1k tbn, 1k tbc
  
      Metadata:
  
        BPS             : 1023638
  
        BPS-eng         : 1023638
  
        _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  
        DURATION-eng    : 00:23:17.980000000
  
        NUMBER_OF_FRAMES: 33518
  
        NUMBER_OF_FRAMES-eng: 33518
  
        NUMBER_OF_BYTES : 178878340
  
        NUMBER_OF_BYTES-eng: 178878340
  
        _STATISTICS_WRITING_APP: mkvmerge v9.3.1 ('Mask Machine') 64bit
  
        _STATISTICS_WRITING_APP-eng: mkvmerge v9.3.1 ('Mask Machine') 64bit
  
        _STATISTICS_WRITING_DATE_UTC: 2016-07-30 17:28:29
  
        _STATISTICS_WRITING_DATE_UTC-eng: 2016-07-30 17:28:29
  
        _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  
        DURATION        : 00:22:13.164000000
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [matroska,webm @ 0000000002605dc0] Auto-inserting h264_mp4toannexb bitstream filterpeed=1.87e+003x
  
  frame=56417 fps=47467 q=-1.0 Lsize=  304604kB time=00:39:13.05 bitrate=1060.5kbits/s speed=1.98e+003x
  
  video:304191kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.135798%