Fast pulsing video effect
Posted: 29 Sep 2009 12:49
Ok, a strange problem here. Using latest VLC (1.0.2) to record a live video stream to 2000 kbit/s mp4 using this command:
Click to download the resulting test_2000.mp4 zipped (7 MB).
As you can see about every 0.5 seconds there is a very pixelated frame, it's especially viewable on the skin colours (forehead, neck). I've tried a combination of various bitrates and codec's (div3, mpg2 and mp4), and all have the same pulsating effect.
When playing back using Windows Media Player the pulse is still there, but much harder to see. Any ideas on how to get rid of this problem?
Code: Select all
VLC.exe -Idummy --run-time=30 udp://@239.1.1.11:1234 :sout=#transcode{vcodec=mp4v,vb=2000,scale=1,acodec=mp4a,ab=128,channels=2,deinterlace,audio-sync,samplerate=44100}:duplicate{dst=std{access=file,mux=mp4,dst=D:\\temp\\test_2000.mp4}} vlc://quit
As you can see about every 0.5 seconds there is a very pixelated frame, it's especially viewable on the skin colours (forehead, neck). I've tried a combination of various bitrates and codec's (div3, mpg2 and mp4), and all have the same pulsating effect.
When playing back using Windows Media Player the pulse is still there, but much harder to see. Any ideas on how to get rid of this problem?