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[Linphone-users] problems with h263 codec on Linux, image is completely


From: Gerhard Stengel
Subject: [Linphone-users] problems with h263 codec on Linux, image is completely distorted
Date: Thu, 16 Dec 2010 21:23:28 +0100
User-agent: KMail/1.13.5 (Linux/2.6.34.7-0.5-desktop; KDE/4.5.4; x86_64; ; )

Hi,

when I make a video call using the H263 codec  the video is completely 
distorted, looks like a ghost.
When I start linphone on the command line, I can see that there seems to be 
some trouble with key frames:

[h263 @ 0x9c9b00] warning: first frame is no keyframe
[h263 @ 0x9c9b00] concealing 154 DC, 154 AC, 154 MV errors
[h263 @ 0x9c9b00] illegal ac vlc code at 5x0
[h263 @ 0x9c9b00] Error at MB: 5
[h263 @ 0x9c9b00] concealing 176 DC, 176 AC, 176 MV errors
[h263 @ 0x9c9b00] concealing 88 DC, 88 AC, 88 MV errors
[h263 @ 0x9c9b00] run overflow at 5x0 i:0
[h263 @ 0x9c9b00] Error at MB: 5
[h263 @ 0x9c9b00] run overflow at 13x0 i:0
[h263 @ 0x9c9b00] Error at MB: 13
[h263 @ 0x9c9b00] run overflow at 5x0 i:0
[h263 @ 0x9c9b00] Error at MB: 5
[h263 @ 0x9c9b00] run overflow at 7x0 i:0
[h263 @ 0x9c9b00] Error at MB: 7
[h263 @ 0x9c9b00] run overflow at 18x0 i:0
[h263 @ 0x9c9b00] Error at MB: 18                                               
                                                                                
                       
[h263 @ 0x9c9b00] Error at MB: 49                                               
                                                                                
                       
[h263 @ 0x9c9b00] I cbpy damaged at 4 0                                         
                                                                                
                       
[h263 @ 0x9c9b00] Error at MB: 4                                                
                                                                                
                       
[h263 @ 0x9c9b00] illegal dc 0 at 6 0                                           
                                                                                
                       
[h263 @ 0x9c9b00] run overflow at 0x1 i:0                                       
                                                                                
                       
[h263 @ 0x9c9b00] Error at MB: 23           

etc...

Ring now I'm testing with ekiga's echo address, address@hidden, which only 
seems to support h261 and h263. So I can't 
tell if the other codecs would work.

I'm running linphone 3.3.2 on openSUSE 11.3, x86_64. ffmpeg version is 
0.6.25702svn from packman.

any idea on how this can be solved would be highly welcome.

best regards


Gerhard



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