On Fri, 2005-01-28 at 17:02 -0800, Trent Piepho wrote: > On Thu, 27 Jan 2005, Lehmeier Michael wrote: > > I record from a TV card with the following command: > > mencoder -tv driver=v4l2:input=3:adevice=/dev/dsp:forceaudio tv:// -ovc > > lavc -oac pcm -lavcopts vcodec=mpeg4:vbitrate=3000:keyint=50 -endpos > > 700mb -vf pp=lb -o out.avi > > > > As a test I tried the following line: > > lav2yuv out.avi | yuvscaler -O VCD | mpeg2enc -s -o mpg.mpg > > lav2yuv only works on mjpeg avi files, it can't do other codecs like mpeg4. > > You need to use mplayer to generate the yuv4mpeg stream from the avi. > > mkpipe stream.yuv > mplayer -vo yuv4mpeg:aspect=59/54 -nosound -benchmark -vf scale=352:288 > out.avi > & > mpeg2enc -s -f 1 -o out.mpv < stream.yuv
(sorry for the late reply) I was trying to avoid mplayer in order not to lose interlace information. But by now I have found out that mplayer can scale with interlacing. For the final video I used the following: mplayer -ao pcm -aofile stream.wav -vo yuv4mpeg -vf scale=480:576:1 out.avi & cat stream.wav | mp2enc -s -r 48000 -b 224 -o audio.m2a & cat stream.yuv | mpeg2enc -f 8 -o video.m2v mplex -o out_dvd480.mpg -f 8 audio.m2a video.m2v However, I am still not sure if I should do it that way. I also tried to encode deinterlaced but got a significantly better result. However, it cost me more space: 44656640 out_dvd480.mpg 28774400 out_dvd480_deint.mpg Is there a rule of thumb when to use interlacing and when not? (BTW, the source material was pretty old and noisy camcorder recordings) -- Lehmeier Michael <[EMAIL PROTECTED]> ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
