On Monday 25 February 2008, Peter Daum wrote: > Even after looking through the sources I am still > not sure whether the "crop" option doesn' work > because of a problem in the driver/firmware or > simply because the hardware can't do it ... > > Can anybody maybe think of another workaround? > I am trying to encode a bunch of old videotapes. > Around the edges there is a big strip without any > useful information. Particularly annoying is the > bottom with very agitated stripes and other noise > that probably need quite some bandwidth and are also > visually disturbing. > > (My CPU is not fast enouogh to transcode the video, > which mostly is the motive for using a hardware > encoder)
MPEG-2 takes too much space anyway for long-term archiving, IMHO. So what I do is to capture the old videotapes without cropping, and then to re-encode them, either * to Xvid using "transcode" with -j 0,0,16,0 * or to ogg/theora using ffmpeg2theora --optimize --cropbottom 16 thefile.mpg (to remove the 16 bottom pixels, since that's where I get the agitated stripes) This reduces the file size by a factor 4 or 5 without losing visual quality (especially for something that comes from an old tape in the first place :). -- David Faure, [EMAIL PROTECTED], sponsored by Trolltech to work on KDE, Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org). _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
