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