On 4/25/05, Brad Templeton <[EMAIL PROTECTED]> wrote: > On Mon, Apr 25, 2005 at 11:41:15AM -0500, Barry Jett wrote: > > On 4/23/05, William <[EMAIL PROTECTED]> wrote: > > > Hello List, > > > > > > I would like to transcode down some mpeg2 (pvr-250) recordings into > > > (mpeg4, > > > avi, divx, whatever...) to keep as videos for when people come over. This > > > is > > > primarily for kids stuff but I would like to keep some adult titles too. > > > Here is my question. > > > > > > What is the best format and settings to give a good reduction in file size > > > without noticably reducing the quality of the picture? Please note that I > > > am > > > viewing on a hi-def widescreen monitor so good picture quality is vital. > > > The > > > format does not need to be directly supported by transcode but it needs to > > > be playable with mplayer or xine. Avidemux2 comes to mind as an > > > alternative > > > for doing the conversions. > > > > > > I tried transcoding using the default mpeg4 settings in myth but the > > > results > > > were very poor. Very blocky and lots of artifacts. Maybe acceptable for > > > kids > > > but not personnaly. Any thoughts? > > > > > > Bill > > > > > > > > > > After much experimentation, I used the following with good results for > > compressing > > PVR-250 mpeg2's to mpeg4. While slower on encoding , the msmpeg4v2 codec > > leaves me with a file easily playable on windows, and the quality seem's a > > tad > > better. I usually play the files with mythvideo on my high def Sony. > > > > TARGET="source.nuv" > > OUTPUT="/data/video/new-file.avi" > > > > #optimal bitrate is 5.86*width*height > > > > OPTIONS="vbitrate=3000000:mbd=2:keyint=132:vqblur=1.0:cmp=2:subcmp=2:dia=2:mv0:last_pred=3" > > > > rm -f frameno.avi > > > > nice -n 19 mencoder $TARGET -vop denoise3d,lavcdeint \ > > -ovc lavc -lavcopts vcodec=msmpeg4v2:$OPTIONS:vpass=1 \ > > -oac mp3lame -lameopts cbr:br=128 \ > > -o $OUTPUT > > > > nice -n 19 mencoder $TARGET -vop denoise3d,lavcdeint \ > > -ovc lavc -lavcopts vcodec=msmpeg4v2:$OPTIONS:vpass=2 \ > > -oac mp3lame -lameopts cbr:br=128 \ > > -o $OUTPUT > > It makes sense to use vpass=1:turbo instead of vpass=1 in this case. > > In fact, I just do: > > for pass in 1:turbo 2 ; do > mplayer command $pass:$options > done > > To simplify and help editing it.
are these options you enter in during Mythtv setup? or are they cmd-line options for transcode? or homegrown scripts? any other docs you could point me to? thanks _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
