[Live-devel] openRTSP -- MP4 Audio/Video Capture -- Multiple Edit Lists -- Desync when editing

Brad Thomas vidiot1000 at yahoo.com
Mon Apr 18 11:23:36 PDT 2011


Hello,
 
We are currently using openRTSP to capture audio/video from Axis network Cameras 
(p1344) with the following command: 

 
openRTSP -b 200000 -4 -f 30 -y –u <username> <password>  -w 1280 -h 720  -d $DUR 
"rtsp://172.29.1.100:554/axis-media/media.amp?streamprofile=profile"  > 
"/media/recordings/drive1/classroom/310-$2.mp4" &
 
(Also tried it without the –f 30)
 
The resulting video will playback perfectly with the popular programs tried 
(vlc, quicktime, etc) but any attempt to edit the video will result in the audio 
and video desyncing.  I have yet to find a program to overcome the issue.
 
When using ffmpeg to manipulate the video this warning is printed:
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2c80510] multiple edit list entries, a/v desync 
might occur, patch welcome
 
It seems that the multiple edit lists are the cause of the editing issues.  
 
Is there any way to overcome this with openRTSP when the video is saved? Has 
anyone else encountered this issue and way to fix the desyncing.
 
Any help is appreciated.
 
Have a nice day,
Brad Thomas



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