[FFmpeg-trac] #285(avformat:closed): RTSP h264 video stream always reports corrupted macroblock

FFmpeg trac at avcodec.org
Fri Sep 23 00:05:20 EEST 2016

#285: RTSP h264 video stream always reports corrupted macroblock
             Reporter:  bovine       |                    Owner:  michael
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:  avformat
              Version:  unspecified  |               Resolution:  fixed
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by Ph0t0n):

 I did some online research today because I am still seeing similar errors.
 Back in 2011 a fix to the UDP code was contributed that made a huge
 improvement, but I don't think it's completely fixed. I have run quite a
 few streams now that exhibit a slight "smearing" issue.  It appears to
 occur in higher resolution videos and whenever a network connection isn't
 absolutely pristine.

 The reason I believe ffmpeg's RTSP UDP mode is still broken is because
 other libraries are able to play the streams without the issues. VLC for
 instance uses Lib555. I have found several groups online that solved the
 issue by switching to a different RTSP library.  The majority of people
 seem to be solving it by switching to TCP, but that pretty much defeats
 the whole purpose of RTSP and it increases latency.

Ticket URL: <https://trac.ffmpeg.org/ticket/285#comment:23>
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