[FFmpeg-trac] #2778(undetermined:new): Corrupt image when transcoding H264 stream to JPEG using IB-CAM2002

[FFmpeg]

#2778: Corrupt image when transcoding H264 stream to JPEG using IB-CAM2002
-------------------------------------+-------------------------------------
             Reporter:  imavra       |                    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 imavra):

 Example of 13 continuus mjpeg transcodings:


 {{{
 RTP: missed 46 packets0.0 size=N/A time=00:00:03.00 bitrate=N/A dup=0
 drop=23
 [h264 @ 0xb06e7c0] concealing 1711 DC, 1711 AC, 1711 MV errors in I frame
 [h264 @ 0xae73360] RTP: missed 1 packets
 [h264 @ 0xb0b3380] Cannot use next picture in error concealment
 [h264 @ 0xb0b3380] concealing 1464 DC, 1464 AC, 1464 MV errors in P frame
 RTP: missed 25 packets0.0 size=N/A time=00:00:04.00 bitrate=N/A dup=0
 drop=32
 [h264 @ 0xb0b3380] negative number of zero coeffs at 20 46
 [h264 @ 0xb0b3380] error while decoding MB 20 46
 [h264 @ 0xb0b3380] concealing 1469 DC, 1469 AC, 1469 MV errors in I frame
 RTP: missed 24 packets0.0 size=N/A time=00:00:04.00 bitrate=N/A dup=0
 drop=40
 [h264 @ 0xb0b3380] corrupted macroblock 39 46 (total_coeff=-1)
 [h264 @ 0xb0b3380] error while decoding MB 39 46
 [h264 @ 0xb0b3380] concealing 1450 DC, 1450 AC, 1450 MV errors in I frame
 RTP: missed 24 packets0.0 size=N/A time=00:00:05.00 bitrate=N/A dup=0
 drop=55
 [h264 @ 0xb0b3380] Invalid level prefix
 [h264 @ 0xb0b3380] error while decoding MB 28 46
 [h264 @ 0xb0b3380] concealing 1461 DC, 1461 AC, 1461 MV errors in I frame
 RTP: missed 24 packets0.0 size=N/A time=00:00:07.00 bitrate=N/A dup=0
 drop=71
 [h264 @ 0xb0b3380] corrupted macroblock 25 46 (total_coeff=-1)
 [h264 @ 0xb0b3380] error while decoding MB 25 46
 [h264 @ 0xb0b3380] concealing 1464 DC, 1464 AC, 1464 MV errors in I frame
 RTP: missed 24 packets0.0 size=N/A time=00:00:08.00 bitrate=N/A dup=0
 drop=86
 [h264 @ 0xb0b3380] out of range intra chroma pred mode at 24 46
 [h264 @ 0xb0b3380] error while decoding MB 24 46
 [h264 @ 0xb0b3380] concealing 1465 DC, 1465 AC, 1465 MV errors in I frame
 RTP: missed 24 packets0.0 size=N/A time=00:00:09.00 bitrate=N/A dup=0
 drop=101
 [h264 @ 0xb0b3380] out of range intra chroma pred mode at 18 46
 [h264 @ 0xb0b3380] error while decoding MB 18 46
 [h264 @ 0xb0b3380] concealing 1471 DC, 1471 AC, 1471 MV errors in I frame
 RTP: missed 24 packets0.0 size=N/A time=00:00:09.00 bitrate=N/A dup=0
 drop=110
 [h264 @ 0xb0b3380] corrupted macroblock 24 46 (total_coeff=-1)
 [h264 @ 0xb0b3380] error while decoding MB 24 46
 [h264 @ 0xb0b3380] concealing 1465 DC, 1465 AC, 1465 MV errors in I frame
 RTP: missed 24 packets0.0 size=N/A time=00:00:10.00 bitrate=N/A dup=0
 drop=125
 [h264 @ 0xb0b3380] corrupted macroblock 25 46 (total_coeff=-1)
 [h264 @ 0xb0b3380] error while decoding MB 25 46
 [h264 @ 0xb0b3380] concealing 1464 DC, 1464 AC, 1464 MV errors in I frame
 frame=   13 fps=1.6 q=0.0 Lsize=N/A time=00:00:13.00 bitrate=N/A dup=0
 drop=131
 video:1109kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 -100.001937%
 }}}

 Half of them were ok and half of them were corrupt!

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2778#comment:2>
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