[FFmpeg-trac] #6400(undetermined:new): Canopus HQA video stream is truncated on decode

[FFmpeg]

#6400: Canopus HQA video stream is truncated on decode
-------------------------------------+-------------------------------------
             Reporter:  terran       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 When decoding the video stream only (-an) from a Canopus HQA source, I'm
 seeing the decode exit without error after decoding only the first 27209
 of 43756 frames. However, if both audio and video streams are decoded, the
 full 43756 video frames are decoded. The source is a 25GB AVI/RIFF so uses
 multiple RIFF chunks per the AVI extension to go beyond 4GB.
 Interestingly, the RIFF chunk at approximately 16GB starts on frame 26920
 AND it also appears that the last 10 seconds of video decoded are *from
 the end* of the video stream, as if it is skipping to 10 seconds before
 the end.

 Decodes full video stream:
 {{{
 [~] ffmpeg -i ~/video/tooshort.avi -f null -
 ffmpeg version git-2017-05-17-b7b02ae Copyright (c) 2000-2017 the FFmpeg
 developers
   built with Apple LLVM version 8.1.0 (clang-802.0.42)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-b7b02ae --enable-
 shared --enable-pthreads --enable-gpl --enable-version3 --enable-
 hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-
 ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-
 opencl --disable-lzma --enable-vda
   libavutil      55. 63.100 / 55. 63.100
   libavcodec     57. 96.101 / 57. 96.101
   libavformat    57. 72.101 / 57. 72.101
   libavdevice    57.  7.100 / 57.  7.100
   libavfilter     6. 90.100 /  6. 90.100
   libavresample   3.  6.  0 /  3.  6.  0
   libswscale      4.  7.101 /  4.  7.101
   libswresample   2.  8.100 /  2.  8.100
   libpostproc    54.  6.100 / 54.  6.100
 Guessed Channel Layout for Input Stream #0.1 : stereo
 Input #0, avi, from '/Users/tvigil/video/tooshort.avi':
   Duration: 00:24:19.99, start: 0.000000, bitrate: 144837 kb/s
     Stream #0:0: Video: hq_hqa (CUVC / 0x43565543), yuv422p(top first),
 1920x1080 [SAR 1:1 DAR 16:9], 143299 kb/s, 29.97 fps, 29.97 tbr, 29.97
 tbn, 29.97 tbc
     Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz,
 stereo, s16, 1536 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (hq_hqa (native) -> wrapped_avframe (native))
   Stream #0:1 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf57.72.101
     Stream #0:0: Video: wrapped_avframe, yuv422p(progressive), 1920x1080
 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
     Metadata:
       encoder         : Lavc57.96.101 wrapped_avframe
     Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
     Metadata:
       encoder         : Lavc57.96.101 pcm_s16le
 frame=43756 fps= 59 q=-0.0 Lsize=N/A time=00:24:19.99 bitrate=N/A
 speed=1.98x
 video:22562kB audio:273748kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: unknown
 }}}

 Decodes partial video stream:
 {{{
 [~] ffmpeg -i ~/video/tooshort.avi -an -f null -
 ffmpeg version git-2017-05-17-b7b02ae Copyright (c) 2000-2017 the FFmpeg
 developers
   built with Apple LLVM version 8.1.0 (clang-802.0.42)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-b7b02ae --enable-
 shared --enable-pthreads --enable-gpl --enable-version3 --enable-
 hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-
 ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-
 opencl --disable-lzma --enable-vda
   libavutil      55. 63.100 / 55. 63.100
   libavcodec     57. 96.101 / 57. 96.101
   libavformat    57. 72.101 / 57. 72.101
   libavdevice    57.  7.100 / 57.  7.100
   libavfilter     6. 90.100 /  6. 90.100
   libavresample   3.  6.  0 /  3.  6.  0
   libswscale      4.  7.101 /  4.  7.101
   libswresample   2.  8.100 /  2.  8.100
   libpostproc    54.  6.100 / 54.  6.100
 Guessed Channel Layout for Input Stream #0.1 : stereo
 Input #0, avi, from '/Users/tvigil/video/tooshort.avi':
   Duration: 00:24:19.99, start: 0.000000, bitrate: 144837 kb/s
     Stream #0:0: Video: hq_hqa (CUVC / 0x43565543), yuv422p(top first),
 1920x1080 [SAR 1:1 DAR 16:9], 143299 kb/s, 29.97 fps, 29.97 tbr, 29.97
 tbn, 29.97 tbc
     Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz,
 stereo, s16, 1536 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (hq_hqa (native) -> wrapped_avframe (native))
 Press [q] to stop, [?] for help
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf57.72.101
     Stream #0:0: Video: wrapped_avframe, yuv422p, 1920x1080 [SAR 1:1 DAR
 16:9], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
     Metadata:
       encoder         : Lavc57.96.101 wrapped_avframe
 frame=27209 fps= 59 q=-0.0 Lsize=N/A time=00:15:07.87 bitrate=N/A
 speed=1.95x
 video:14030kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6400>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker