[FFmpeg-trac] #5151(undetermined:new): mjpeg2jpeg bitstream filter does not correctly recognize mjpeg streams

[FFmpeg]

#5151: mjpeg2jpeg bitstream filter does not correctly recognize mjpeg streams
-------------------------------------+-------------------------------------
             Reporter:  thebombzen   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  bitstream    |               Blocked By:
  filter, bsf, mjpeg2jpeg, mjpeg,    |  Reproduced by developer:  0
  jpeg                               |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 The mjpeg2jpeg bitstream filter whines that a stream is not in the mjpeg
 format, even though it is. The bitstream filter does nothing as well.
 How to reproduce:
 {{{
 $ ./ffmpeg -i bitstream_filter_test.mjpeg -c copy -bsf mjpeg2jpeg
 out.mjpeg
 ffmpeg version N-77803-g7c97946 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
   configuration:
   libavutil      55. 13.100 / 55. 13.100
   libavfilter     6. 23.100 /  6. 23.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
 [mjpeg @ 0x3bad440] Format mjpeg detected only with low score of 25,
 misdetection possible!
 [mjpeg @ 0x3bae5a0] Changing bps to 8
 Input #0, mjpeg, from 'bitstream_filter_test.mjpeg':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown),
 1280x720, 25 tbr, 1200k tbn, 25 tbc
 Output #0, mjpeg, to 'out.mjpeg':
   Metadata:
     encoder         : Lavf57.21.101
     Stream #0:0: Video: mjpeg, yuvj422p, 1280x720, q=2-31, 25 tbr, 25 tbn,
 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 [NULL @ 0x3bb0680] input is not MJPEG/AVI1
 [NULL @ 0x3bb0680] Failed to open bitstream filter mjpeg2jpeg for stream 0
 with codec copy: Invalid data found when processing input
 frame=   22 fps=0.0 q=-1.0 Lsize=    4199kB time=00:00:00.88
 bitrate=39084.4kbits/s speed=58.8x
 video:4199kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.000000%
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5151>
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