[Libav-user] Problems Receiving H.264 RTSP Stream

[Vicente Fernandes]

Hi,
I have exactly the same problem.
somebody could solve it?



Em 11 de novembro de 2011 10:22, Johannes Ebersold <
johannes.ebersold at dfki.de> escreveu:

> Hi,
>
> i currently implementing an application to receive and decode an H.264
> RTSP stream using libavcodec and libavformat.
>
> The stream is displayed correctly for small resolutions (e.g. quarter VGA)
> but the frames are broken for higher resolutions (e.g. HD). The upper half
> of the frame is nicely and correctly displayed, however the lower half is
> simply not there and the last line of correct pixels gets interpolated for
> the complete lower half of the frame. Additionally, there are some small
> artefacts in the upper left corner of the frame. It seems like a
> (ring?)buffer is full, the first macroblock is overwritten and the
>  remaining part of the frame is discarded in order to avoid overwritting
> the complete buffer.
>
> I add some debug output at the end of the mail, it may be helpful.
>
> The problem may be related to ticket #285 (
> http://ffmpeg.org/trac/ffmpeg/ticket/285), since the errors look exactly
> the same. However, the proposed fix (comment 12) did not work and the
> "missed x packets" message could not be reproduced.
>
> This issue also appears if ffplay is used to receive the stream and
> appears with ffmpeg version 0.8.5 as well as with the latest git head.
>
> Thanks for any help and hints :)
>
> Regards, Johannes
>
>
> Debug Output:
>
> [rtsp @ 0x13ed8e0] SDP:
> v=0
> o=- 1321005425421685 1 IN IP4 172.16.7.100
> s=NetVFB
> i=netvfbStream0
> t=0 0
> a=tool:LIVE555 Streaming Media v2011.08.22
> a=type:broadcast
> a=control:*
> a=range:npt=0-
> a=x-qt-text-nam:NetVFB
> a=x-qt-text-inf:netvfbStream0
> m=video 0 RTP/AVP 96
> c=IN IP4 0.0.0.0
> b=AS:10000
> a=rtpmap:96 H264/90000
> a=control:track1
>
> [rtsp @ 0x13ed8e0] video codec set to: h264
> [rtsp @ 0x13ed8e0] hello state=0
> [h264 @ 0x13f0440] Unsupported bit depth: 0
> [h264 @ 0x13f0440] non-existing PPS referenced
> [h264 @ 0x13f0440] non-existing PPS 0 referenced
> [h264 @ 0x13f0440] decode_slice_header error
> [h264 @ 0x13f0440] no frame!
> [h264 @ 0x13f0440] out of range intra chroma pred mode at 45 33
> [h264 @ 0x13f0440] error while decoding MB 45 33
> [h264 @ 0x13f0440] concealing 5044 DC, 5044 AC, 5044 MV errors
> [rtsp @ 0x13ed8e0] All info found
> [rtsp @ 0x13ed8e0] Estimating duration from bitrate, this may be inaccurate
> Input #0, rtsp, from 'rtsp://172.16.7.100:8554/netvfbStream0':
>  Metadata:
>    title           : NetVFB
>    comment         : netvfbStream0
>  Duration: N/A, start: 0.068189, bitrate: N/A
>    Stream #0.0, 22, 1/90000: Video: h264 (Constrained Baseline), yuv420p,
> 1920x1200, 1/50, 41.67 fps, 25 tbr, 90k tbn, 50 tbc
> [rtsp @ 0x13ed8e0] hello state=1
> [h264 @ 0x13f0440] Missing reference picture
> [h264 @ 0x13f0440] decode_slice_header error
> [h264 @ 0x13f0440] concealing 9000 DC, 9000 AC, 9000 MV errors
> [h264 @ 0x13f0440] out of range intra chroma pred mode at 45 33
> [h264 @ 0x13f0440] error while decoding MB 45 33
> [h264 @ 0x13f0440] concealing 5044 DC, 5044 AC, 5044 MV errors
> [h264 @ 0x13f0440] corrupted macroblock 44 33 (total_coeff=-1)
> [h264 @ 0x13f0440] error while decoding MB 44 33
> [h264 @ 0x13f0440] concealing 5045 DC, 5045 AC, 5045 MV errors
> [h264 @ 0x13f0440] concealing 5054 DC, 5054 AC, 5054 MV errors
> [h264 @ 0x13f0440] Frame num gap 3 1
> [h264 @ 0x13f0440] Frame num gap 2 0
> [h264 @ 0x13f0440] no picture
> [h264 @ 0x13f0440] Frame num gap 5 3
> [h264 @ 0x13f0440] out of range intra chroma pred mode at 41 33
> [h264 @ 0x13f0440] error while decoding MB 41 33
> [h264 @ 0x13f0440] concealing 5048 DC, 5048 AC, 5048 MV errors
> [h264 @ 0x13f0440] Frame num gap 2 0
> [h264 @ 0x13f0440] Frame num gap 7 5
> [h264 @ 0x13f0440] Invalid level prefix
> [h264 @ 0x13f0440] error while decoding MB 49 33
> [h264 @ 0x13f0440] concealing 5040 DC, 5040 AC, 5040 MV errors
> [h264 @ 0x13f0440] Frame num gap 2 0
> [h264 @ 0x13f0440] Frame num gap 5 3
> [h264 @ 0x13f0440] out of range intra chroma pred mode at 48 33
> [h264 @ 0x13f0440] error while decoding MB 48 33
> [h264 @ 0x13f0440] concealing 5041 DC, 5041 AC, 5041 MV errors
> [h264 @ 0x13f0440] Frame num gap 2 0
> [h264 @ 0x13f0440] corrupted macroblock 46 33 (total_coeff=-1)
> [h264 @ 0x13f0440] error while decoding MB 46 33
> [h264 @ 0x13f0440] concealing 5043 DC, 5043 AC, 5043 MV errors
> [h264 @ 0x13f0440] Frame num gap 2 0
> [h264 @ 0x13f0440] mb_type 163 in I slice too large at 37 33
> [h264 @ 0x13f0440] error while decoding MB 37 33
> [h264 @ 0x13f0440] concealing 5052 DC, 5052 AC, 5052 MV errors
> [h264 @ 0x13f0440] Frame num gap 2 0
>
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