Re: [gentoo-user] Re: Video editing advice on formats and size of file

[David Haller]

Hello,

On Sun, 01 Jan 2012, Mick wrote:
>Anyhow, have a look again at the mencoder man page.  There's a few
>settings in there for video called "extreme" and "insane".  You may
>want to try them.

I use 

-ovc x264 -x264encopts \
crf=22:trellis=1:qcomp=0.8:weight_b:8x8dct:subq=6:threads=1:nr=750

or the same with crf=23 for lower quality input and nr=500 (for clean
input). That gives me for DVD MPEG2 input output of the same quality
(and yes, I've looked at very difficult parts of both input and output
basically "frame by frame" while finding those settings ;)

Those settings give quite small files at times, esp. due to the 'nr'
noise reduction filter (which makes files 20-50% smaller with no
visual impact and little impact (<6%) on encoding speed. I get e.g. a
mere 241MiB video track for a 41:19min series-episode in PAL
(720x576@25fps progessive anamorphic (=> 1024x576) with crf=22). The
MPEG2 original is 1.16GiB for the video track...

For me, depending on input, above settings are the "sweet spot"
regarding quality (no difference I can see, either at 1:1 or
fullscreen at 1280x1024 with black bars) and file size.

HTH,
-dnh

-- 
Never put off till tomorrow what you can avoid all together.
                                               -- fortune file