[MEncoder-users] -ss and -endpos cutting creates very visible h264 artifacts

[film123 at gmail.com]

I had similar artifacts at the first 4 seconds of my video (maybe where the
header lies?) and I got rid of them with -vf scale=425:344 which is the
exact size of the video.
I actually also forced an aspect ratio of 16/9 with this:
-vf scale=$x:$y,expand=aspect=16/9  where $x and $y is the width and height
variables I calculated from an ffmpeg that was done previously.
If this doesn't work, change the size height & width to the closest factor
of 12 pixels.
Good luck.
bg


On Sun, Feb 28, 2010 at 2:56 AM, Reimar Döffinger
<Reimar.Doeffinger at gmx.de>wrote:

> On Sat, Feb 27, 2010 at 11:23:16PM -0800, Marc MERLIN wrote:
> >           nice -19 mencoder -passlogfile "$pass" $demux $aud_channels
> $aud_srate -oac mp3lame -lameopts mode=3:abr:br=$abr $time $aspect $vf -ovc
> x264 -x264encopts bitrate=$br:turbo=1:pass=1:threads=0 $rot -o "$dest"
> "$src" || die "multipass failed on pass $i"
>
> Doing this step with SVN r30790 might give better results on the copy
> later,
> but I'm not at all sure.
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