[FFmpeg-trac] #7121(undetermined:new): Changing framerate of an MJPEG stream with piping drops malformed images
FFmpeg
trac at avcodec.org
Tue Apr 3 18:56:54 EEST 2018
#7121: Changing framerate of an MJPEG stream with piping drops malformed images
-------------------------------------+-------------------------------------
Reporter: firesharker | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by Gyan):
I tested with current git using same commands when this was asked at SE
and it reproduces.
Of note is the following from first command in pipe with `-v 48`. The
salient parts are the buffer sizes reported
{{{
[avi @ 0000000000498340] Before avformat_find_stream_info() pos: 5678
bytes read:130312 seeks:4 nb_streams:1
[mjpeg @ 0000000002904400] marker=d8 avail_size_in_buf=87542
[mjpeg @ 0000000002904400] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904400] marker=db avail_size_in_buf=87540
[mjpeg @ 0000000002904400] index=0
[mjpeg @ 0000000002904400] qscale[0]: 4
[mjpeg @ 0000000002904400] marker parser used 67 bytes (536 bits)
[mjpeg @ 0000000002904400] marker=db avail_size_in_buf=87471
[mjpeg @ 0000000002904400] index=1
[mjpeg @ 0000000002904400] qscale[1]: 9
[mjpeg @ 0000000002904400] marker parser used 67 bytes (536 bits)
[mjpeg @ 0000000002904400] marker=c0 avail_size_in_buf=87402
[mjpeg @ 0000000002904400] Changing bps from 0 to 8
[mjpeg @ 0000000002904400] sof0: picture: 1280x720
[mjpeg @ 0000000002904400] component 0 2:2 id: 0 quant:0
[mjpeg @ 0000000002904400] component 1 1:1 id: 1 quant:1
[mjpeg @ 0000000002904400] component 2 1:1 id: 2 quant:1
[mjpeg @ 0000000002904400] pix fmt id 22111100
[mjpeg @ 0000000002904400] Format yuvj420p chosen by get_format().
[mjpeg @ 0000000002904400] marker parser used 17 bytes (136 bits)
[mjpeg @ 0000000002904400] marker=c4 avail_size_in_buf=87383
[mjpeg @ 0000000002904400] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904400] marker=c4 avail_size_in_buf=87350
[mjpeg @ 0000000002904400] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904400] marker=c4 avail_size_in_buf=87167
[mjpeg @ 0000000002904400] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904400] marker=c4 avail_size_in_buf=87134
[mjpeg @ 0000000002904400] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904400] marker=ef avail_size_in_buf=86951
[mjpeg @ 0000000002904400] marker parser used 152 bytes (1216 bits)
[mjpeg @ 0000000002904400] escaping removed 816 bytes
[mjpeg @ 0000000002904400] marker=da avail_size_in_buf=86796
[mjpeg @ 0000000002904400] marker parser used 85980 bytes (687840 bits)
[mjpeg @ 0000000002904400] marker=d9 avail_size_in_buf=576
[mjpeg @ 0000000002904400] decode frame unused 576 bytes
[avi @ 0000000000498340] max_analyze_duration 5000000 reached at 5000000
microseconds st:0
}}}
And in the receiving command,
{{{
[image2pipe @ 00000000028f2f00] Opening 'pipe:' for reading
[pipe @ 00000000028f3b40] Setting default whitelist 'crypto'
[image2pipe @ 00000000028f2f00] Before avformat_find_stream_info() pos: 0
bytes read:32768 seeks:0 nb_streams:1
[mjpeg @ 0000000002904d80] marker=d8 avail_size_in_buf=2003270
[mjpeg @ 0000000002904d80] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904d80] marker=db avail_size_in_buf=2003268
[mjpeg @ 0000000002904d80] index=0
[mjpeg @ 0000000002904d80] qscale[0]: 4
[mjpeg @ 0000000002904d80] marker parser used 67 bytes (536 bits)
[mjpeg @ 0000000002904d80] marker=db avail_size_in_buf=2003199
[mjpeg @ 0000000002904d80] index=1
[mjpeg @ 0000000002904d80] qscale[1]: 9
[mjpeg @ 0000000002904d80] marker parser used 67 bytes (536 bits)
[mjpeg @ 0000000002904d80] marker=c0 avail_size_in_buf=2003130
[mjpeg @ 0000000002904d80] Changing bps from 0 to 8
[mjpeg @ 0000000002904d80] sof0: picture: 1280x720
[mjpeg @ 0000000002904d80] component 0 2:2 id: 0 quant:0
[mjpeg @ 0000000002904d80] component 1 1:1 id: 1 quant:1
[mjpeg @ 0000000002904d80] component 2 1:1 id: 2 quant:1
[mjpeg @ 0000000002904d80] pix fmt id 22111100
[mjpeg @ 0000000002904d80] Format yuvj420p chosen by get_format().
[mjpeg @ 0000000002904d80] marker parser used 17 bytes (136 bits)
[mjpeg @ 0000000002904d80] marker=c4 avail_size_in_buf=2003111
[mjpeg @ 0000000002904d80] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904d80] marker=c4 avail_size_in_buf=2003078
[mjpeg @ 0000000002904d80] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904d80] marker=c4 avail_size_in_buf=2002895
[mjpeg @ 0000000002904d80] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904d80] marker=c4 avail_size_in_buf=2002862
[mjpeg @ 0000000002904d80] marker parser used 0 bytes (0 bits)
[mjpeg @ 0000000002904d80] marker=ef avail_size_in_buf=2002679
[mjpeg @ 0000000002904d80] marker parser used 152 bytes (1216 bits)
[mjpeg @ 0000000002904d80] escaping removed 1916544 bytes
[mjpeg @ 0000000002904d80] marker=da avail_size_in_buf=2002524
[mjpeg @ 0000000002904d80] marker parser used 85980 bytes (687840 bits)
[mjpeg @ 0000000002904d80] marker=d9 avail_size_in_buf=1916304
[mjpeg @ 0000000002904d80] decode frame unused 1916304 bytes
[image2pipe @ 00000000028f2f00] Probe buffer size limit of 5000000 bytes
reached
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7121#comment:3>
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