On 29 August 2006 13:55, Iain Buchanan wrote: > On Mon, 2006-08-28 at 22:09 +0930, Iain Buchanan wrote: > > On Fri, 2006-08-11 at 08:21 +0100, Uwe Thiem wrote: > > > On 10 August 2006 23:06, Iain Buchanan wrote: > > > > Hi all, > > > > > > > > I'm trying out mencoder to try a few different codecs and formats for > > > > 1. dvd authoring and 2. just compressing to keep on my HD. > > > > > > For DVDs, try this: > > > > > > mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd \ > > > -vf scale=720:576,harddup -srate 48000 -af lavcresample=48000 \ > > > -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:\ > > > vbitrate=5000:keyint=15:acodec=ac3:abitrate=192:aspect=4/3 \ > > > -ofps 25 -o outfile.mpeg infile > > > > wow! I just got around to trying that a couple of days ago and it > > produces great output: fast, small file size, and no noticeable > > difference in quality between the mpeg and the original dv! (I watched > > many different clips many times over to make sure! on TV and on my LCD) > > Hmm, on closer inspection, I _do_ notice the output is slightly lower > quality. (Don't know why I didn't see it before...) Is there any way I > can tweak the quality? Can I change vbitrate, or is 5000 a dvd standard?
You can play with srate, lavresample, vrc_maxrate and vbitrate. Uwe -- Mark Twain: I rather decline two drinks than a German adjective. http://www.SysEx.com.na -- gentoo-user@gentoo.org mailing list
