[FFmpeg-trac] #3823(avformat:closed): RTP encoding of MJPEG from Trendnet TV-IP651WI (IP cam) gives undecodable stream

[FFmpeg]

#3823: RTP encoding of MJPEG from Trendnet TV-IP651WI (IP cam) gives undecodable
stream
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             Reporter:  Krieger     |                    Owner:
                 Type:  defect      |                   Status:  closed
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:  invalid
             Keywords:  mjpeg rtp   |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by andrey.utkin):

 Replying to [comment:12 cehoyos]:
 > Do you think the error message can be improved?

 I think cehoyos' kindness can be improved.

 Is your own 422.jpg attachment intended to fail RTP encoding? It is
 unclear from your comment. Actually, it fails.
 The log of just-pulled fresh git master HEAD:

 {{{
 ffmpeg -loop 0 -i /tmp/422.jpg -c copy -f rtp rtp://127.0.0.1:7777 | tee
 /tmp/422.sdp
 ffmpeg version N-76860-g72eaf72 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.9.3 (Gentoo 4.9.3 p1.2, pie-0.6.3)
   configuration: --enable-debug=3 --disable-optimizations --extra-
 cflags='-O0 -g3 -ggdb3' --enable-pic --disable-stripping --enable-openssl
 --enable-protocol=file --enable-protocol=pipe --enable-protocol=http
 --enable-protocol=https --enable-muxer=matroska --enable-muxer=mjpeg
 --enable-muxer=rtp --enable-muxer=mp4 --enable-muxer=rtsp --enable-
 muxer=rawvideo --enable-muxer=data --enable-demuxer=rtsp --enable-
 demuxer=matroska --enable-demuxer=mjpeg --enable-decoder=h264 --enable-
 decoder=mpeg4 --enable-decoder=mjpeg --enable-parser=h264 --enable-
 parser=mpeg4video --enable-parser=mjpeg --enable-encoder=mjpeg --enable-
 encoder=mpeg4 --enable-encoder=rawvideo --enable-encoder=libx264 --enable-
 libx264 --enable-gpl --enable-nonfree --enable-libfreetype --enable-
 libopenh264 --enable-libvpx --enable-encoder=libopenh264
   libavutil      55.  9.100 / 55.  9.100
   libavcodec     57. 16.100 / 57. 16.100
   libavformat    57. 19.100 / 57. 19.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 15.100 /  6. 15.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 [mjpeg @ 0x31a9b80] Changing bps to 8
 Input #0, image2, from '/tmp/422.jpg':
   Duration: 00:00:00.04, start: 0.000000, bitrate: 5109 kb/s
     Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown),
 256x256 [SAR 1:1 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
 Output #0, rtp, to 'rtp://127.0.0.1:7777':
   Metadata:
     encoder         : Lavf57.19.100
     Stream #0:0: Video: mjpeg, yuvj422p, 256x256 [SAR 1:1 DAR 1:1],
 q=2-31, 25 tbr, 90k tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 SDP:
 v=0
 o=- 0 0 IN IP4 127.0.0.1
 s=No Name
 c=IN IP4 127.0.0.1
 t=0 0
 a=tool:libavformat 57.19.100
 m=video 7777 RTP/AVP 26

 [rtp @ 0x31b1180] RFC 2435 requires standard Huffman tables for jpeg
 frame=    1 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.04 bitrate=
 5.6kbits/s
 video:25kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3823#comment:13>
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