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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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|
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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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OUTFILE="myname-br$BITRATE-pass" |
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OUTEXT=".avi" |
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|
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VIDCOM="-ovc x264 -x264encopts bitrate=$BITRATE" |
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AUDCOM="-oac mp3lame -lameopts vbr=0:br=64:vol=3" |
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|
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RMLOG="rm divx*.log" |
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|
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|
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$RMLOG |
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|
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mencoder $INFILE $VIDCOM $AUDCOM -o "$OUTFILE"1$OUTEXT |
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mencoder $INFILE $VIDCOM=3 $AUDCOM -o "$OUTFILE"2$OUTEXT |
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#mencoder $INFILE $VIDCOM=3 $AUDCOM -o "$OUTFILE"3$OUTEXT |
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#mencoder $INFILE $VIDCOM=3 $AUDCOM -o "$OUTFILE"4$OUTEXT |
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=== end script === |
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|
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Obviously, you have to adjust INFILE (can also be a real file) 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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|
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Uwe |
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|
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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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