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On Mon, 2006-08-28 at 14:16 +0100, Uwe Thiem wrote: |
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> On 28 August 2006 13:39, 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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> > But: the mpeg doesn't seem to scale right. My laptop display is |
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> > 1680x1050, and hence the original dv output (4:3) has black edges on |
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> > each side, but the converted mpeg plays "stretched", so that everybody |
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> > looks fat! |
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> > |
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> > Is this just a _player_ issue, or is it a problem with the encoding of |
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> > the mpeg itself? |
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> > |
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> > I noticed the command line has aspect=4/3 in it already, which is the |
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> > aspect of the original dv file... |
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> |
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> Maybe, the "scale" is wrong for you. How many frame lines do your originals |
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> have? |
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ummm.... blue :P |
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ie. I wouldn't have a clue... how do I tell (not an expert here). |
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I tried without the aspect option and the aspect seems to be correct |
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again. |
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> I actually overlooked "compressing to keep on my HD" in your original post. |
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> For that purpose, try: |
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> |
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> |
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> === begin script === |
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> #! /bin/sh |
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> |
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> BITRATE="730" |
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> |
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> INFILE="dvd://" |
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[snip] |
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that seems to capture from dvd though? I may [not] have mentioned that |
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I'm capturing from video camera through kino to raw dv files. I'm happy |
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with the mpeg2 format for storing on HD. |
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> Obviously, you have to adjust INFILE (can also be a real file) |
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oh, I should read the whole post first! |
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> and OUTFILE. |
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> You should set "br" to 128 for music movies. Play with BITRATE for higher |
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> quality or smaller file size. Beware that it takes *ages* but look at the |
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> result! |
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I'll play with it. |
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thanks again! |
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-- |
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Iain Buchanan <iaindb at netspace dot net dot au> |
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Luck, that's when preparation and opportunity meet. |
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-- P.E. Trudeau |
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-- |
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