[mythtv-commits] Ticket #3001: MPEG-4 decode errors as of [12645]

MythTV mythtv at cvs.mythtv.org
Tue Jan 30 00:04:10 UTC 2007

#3001: MPEG-4 decode errors as of [12645]
 Reporter:  bjm     |        Owner:  janne  
     Type:  defect  |       Status:  new    
 Priority:  major   |    Milestone:  unknown
Component:  mythtv  |      Version:  head   
 Severity:  medium  |   Resolution:         
Comment (by bjm):

 janne, could you address this or get ijr's help? Else this ffmpeg update
 will need to be reverted.

 danielk, this 1 minute was a broad scale rather than an avg arrival rate.
 I neglected to mention that the amount of motion affected the frequency. I
 don't use any of the four checkbox encoding options.

 I first saw this on a basketball game where this would happen 2 or more
 times per minute sometimes in clusters of several in a few seconds.
 Stationary scenes rarely has these errors but it dose seem to happen.

 The error in decoding a frame seems to be consistent. When a flash appears
 or a message is logged, you can pause, "<" to go back by seconds before
 the bad frame then "->" (right arrow) to frame advance to the broken
 frame. The message will repeat each time the frame is drawn and the same
 artifacts will appear.

 In a test right now, I had a case where the error message appeared but
 there were no visible artifacts that I could find. However, other frames,
 usually during high motion, can be spectacularly broken.

Ticket URL: <http://svn.mythtv.org/trac/ticket/3001#comment:3>
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