[Live-devel] Live 555 RTSP client problem

[Ali Gökalp Peker]

Same issue is mentioned before but any answer is given. What can be the problem ? A network setting ?


			[Live-devel] live stream problems
			Gbzbz Gbzbz

			Wed, 04 Jun 2008 02:57:26 -0700
		










Hi,

We try to stream MPEG4 via RTSP with live555. Our flow is like this

DVD -> capture 1 frame (v4l2) ->MPEG4 encoding -> Write_mpeg4_frame to 
myvideo.v -> send_mpeg4_frame_to_live555 -> MPEG4 decoding -> Display on TV

1. when streaming the file myvideo.v with live555's testOnDemandRTSPServer, VLC 
shows smooth and great video.
2. TV displays smooth and great video.
3. live streaming from send_mpeg4_frame_to_live555 step shows jitters and 
errors, we got video, but the quality is crappy from vlc and mplayer. mplayer 
prints the following

[mpeg4 @ 0x3c95184]Error at MB: 312
[mpeg4 @ 0x3c95184]concealing 1097 DC, 1097 AC, 1097 MV errors
[mpeg4 @ 0x3c95184]ac-tex damaged at 5 12                                       
                          
[mpeg4 @ 0x3c95184]Error at MB: 557
[mpeg4 @ 0x3c95184]concealing 859 DC, 859 AC, 859 MV errors
[mpeg4 @ 0x3c95184]1. marker bit missing in 3. esc                              
                          
[mpeg4 @ 0x3c95184]Error at MB: 364
[mpeg4 @ 0x3c95184]concealing 1043 DC, 1043 AC, 1043 MV errors
[mpeg4 @ 0x3c95184]slice end not reached but screenspace end (13352 left 
0ABB06, score= -319)             
[mpeg4 @ 0x3c95184]concealing 1350 DC, 1350 AC, 1350 MV errors
[mpeg4 @ 0x3c95184]1. marker bit missing in 3. esc                              
                          
[mpeg4 @ 0x3c95184]Error at MB: 108
[mpeg4 @ 0x3c95184]concealing 1294 DC, 1294 AC, 1294 MV errors
[mpeg4 @ 0x3c95184]ac-tex damaged at 0 4                                        
                          
[mpeg4 @ 0x3c95184]Error at MB: 184
[mpeg4 @ 0x3c95184]concealing 1226 DC, 1226 AC, 1226 MV errors
[mpeg4 @ 0x3c95184]slice end not reached but screenspace end (10462 left 
132915, score= -320)             
[mpeg4 @ 0x3c95184]concealing 1350 DC, 1350 AC, 1350 MV errors
[mpeg4 @ 0x3c95184]cbpc damaged at 17 9                                         
                          
[mpeg4 @ 0x3c95184]Error at MB: 431
[mpeg4 @ 0x3c95184]concealing 979 DC, 979 AC, 979 MV errors
[mpeg4 @ 0x3c95184]slice end not reached but screenspace end (3571 left 0A7BE8, 
score= -320)              
[mpeg4 @ 0x3c95184]concealing 1350 DC, 1350 AC, 1350 MV errors
[mpeg4 @ 0x3c95184]dc marker bit missing                                        
                          
[mpeg4 @ 0x3c95184]Error at MB: 255
[mpeg4 @ 0x3c95184]concealing 1153 DC, 1153 AC, 1153 MV errors
[mpeg4 @ 0x3c95184]slice end not reached but screenspace end (10368 left 
7F1D5E, score= -322)             
[mpeg4 @ 0x3c95184]concealing 1350 DC, 1350 AC, 1350 MV errors
[mpeg4 @ 0x3c95184]concealing 3 DC, 3 AC, 3 MV errors                           
                          
[mpeg4 @ 0x3c95184]ac-tex damaged at 8 9                                        
                          
[mpeg4 @ 0x3c95184]Error at MB: 422
[mpeg4 @ 0x3c95184]concealing 992 DC, 992 AC, 992 MV errors
[mpeg4 @ 0x3c95184]ac-tex damaged at 10 2                                       
                          
[mpeg4 @ 0x3c95184]Error at MB: 102
[mpeg4 @ 0x3c95184]concealing 1312 DC, 1312 AC, 1312 MV errors
[mpeg4 @ 0x3c95184]concealing 28 DC, 28 AC, 28 MV errors                        
                          
[mpeg4 @ 0x3c95184]illegal dc vlc0                                              
                          
[mpeg4 @ 0x3c95184]Error at MB: 928
[mpeg4 @ 0x3c95184]concealing 497 DC, 497 AC, 497 MV errors
[mpeg4 @ 0x3c95184]1. marker bit missing in 3. esc                              
                          
[mpeg4 @ 0x3c95184]Error at MB: 211
[mpeg4 @ 0x3c95184]concealing 1207 DC, 1207 AC, 1207 MV errors
[mpeg4 @ 0x3c95184]slice end not reached but screenspace end (1118 left 110469, 
score= -329)              
[mpeg4 @ 0x3c95184]concealing 1350 DC, 1350 AC, 1350 MV errors

Anyone can help me? I am not familiar with MPEG stuff at all, still 
learning.....

Thanks!

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