On 2010-02-24 23:24, Yan Seiner wrote: > Philip Rhoades wrote: >> People, >> >> When I record from a USB video grabber using: >> >> mencoder-1.0-0.111.20091029svn.fc12.x86_64 >> >> and: >> >> /usr/bin/mencoder tv:// -tv >> driver=v4l2:width=640:height=480:device=/dev/video0:adevice=hw.0:alsa:forceaudio >> -ovc lavc -oac mp3lame -o out.avi >> >> I see lots of these: >> >> mencoder - Skipping frame! >> >> When replaying, the audio is fine but the video continually displays >> "catching up" rapid video to resync with the audio. >> >> Is it the "Skipping frame" errors causing this? >> >> Thanks, >> >> Phil. > > > Typically that means you have deinterlacing and/or frame rate wrong. OK, when I look at the details of a file recorded with the line above using: mplayer -identify -frames 1 -ao null -vo null out.avi the fps is 25.000, but when I add "-fps 25" to the recording line above, the "Skipping frame!" message does indeed go away and on a short test file just now, it seems to fix the "catching up" problem too - but using: mplayer -identify -frames 1 -ao null -vo null test.avi on the test file also says that the fps is 25.000 - so what is different between the two files? (I see the bitrate is higher in the test file). Thanks, Phil. -- Philip Rhoades GPO Box 3411 Sydney NSW 2001 Australia E-mail: phil at pricom.com.au
