[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       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 When using the options "-i rtsp://192.168.0.220:554/stream1/ -an -r 1 -s
 1280x1024 -y video.jpg" to transcode and image from a camera sream (what
 ZoneMinder does to record CCTV), the image ends up corrupt. When directly
 copying the stream to a file, however, the video can be played back
 normally with no sign of corruption. ffplay, however, core dumps when
 attempting to play the stream. Attached is an example of the corrupt image
 plus a raw stream.

 How to reproduce:
 {{{
 functor at ichigo:~$ ./bin/ffmpeg -i rtsp://192.168.0.220:554/stream1/ -an -r
 1 -s 1280x1024 -y video.jpg
 ffmpeg version git-2013-07-09-c5a1b18 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jul 11 2013 12:32:50 with gcc 4.7 (Ubuntu/Linaro
 4.7.3-1ubuntu1)
   configuration: --prefix=/home/functor/ffmpeg_build --extra-
 cflags=-I/home/functor/ffmpeg_build/include --extra-
 ldflags=-L/home/functor/ffmpeg_buil               d/lib
 --bindir=/home/functor/bin --extra-libs=-ldl --enable-gpl --enable-libass
 --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-li
 btheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-
 nonfree --enable-x11grab
   libavutil      52. 38.100 / 52. 38.100
   libavcodec     55. 18.102 / 55. 18.102
   libavformat    55. 11.101 / 55. 11.101
   libavdevice    55.  2.100 / 55.  2.100
   libavfilter     3. 79.101 /  3. 79.101
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 [h264 @ 0xb1f2360] RTP: missed 14 packets
 [h264 @ 0xb1f2360] corrupted macroblock 40 51 (total_coeff=-1)
 [h264 @ 0xb1f2360] error while decoding MB 40 51
 [h264 @ 0xb1f2360] concealing 1049 DC, 1049 AC, 1049 MV errors in I frame
 Input #0, rtsp, from 'rtsp://192.168.0.220:554/stream1/':
   Metadata:
     title           : Test
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: h264 (Baseline), yuv420p, 1280x1024, 90k tbr, 90k
 tbn, 180k tbc
 Output #0, image2, to 'video.jpg':
   Metadata:
     title           : Test
     encoder         : Lavf55.11.101
     Stream #0:0: Video: mjpeg, yuvj420p, 1280x1024, q=2-31, 200 kb/s, 90k
 tbn, 1 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 -> mjpeg)
 Press [q] to stop, [?] for help
 [h264 @ 0xb3e4a40] corrupted macroblock 40 51 (total_coeff=-1)
 [h264 @ 0xb3e4a40] error while decoding MB 40 51
 [h264 @ 0xb3e4a40] concealing 1049 DC, 1049 AC, 1049 MV errors in I frame
 }}}


 {{{
 functor at ichigo:~/bin$ ./ffplay rtsp://192.168.0.220:554/stream1/
 ffplay version git-2013-07-09-c5a1b18 Copyright (c) 2003-2013 the FFmpeg
 developers
   built on Jul 11 2013 12:32:50 with gcc 4.7 (Ubuntu/Linaro
 4.7.3-1ubuntu1)
   configuration: --prefix=/home/functor/ffmpeg_build --extra-
 cflags=-I/home/functor/ffmpeg_build/include --extra-
 ldflags=-L/home/functor/ffmpeg_build/lib --bindir=/home/functor/bin
 --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac
 --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis
 --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
   libavutil      52. 38.100 / 52. 38.100
   libavcodec     55. 18.102 / 55. 18.102
   libavformat    55. 11.101 / 55. 11.101
   libavdevice    55.  2.100 / 55.  2.100
   libavfilter     3. 79.101 /  3. 79.101
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, rtsp, from 'rtsp://192.168.0.220:554/stream1/':0B f=0/0
   Metadata:
     title           : Test
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: h264 (Baseline), yuv420p, 1280x1024, 90k tbr, 90k
 tbn, 180k tbc
 Segmentation fault (core dumped)   0KB vq=   67KB sq=    0B f=0/0
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2778>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker