[MPlayer-users] Re: tmpgenc is better!?!?!?

[David Kuehling]

> I made this homevideo, with a sony (digital) camera, and i captured it
> = using adobe premiere, and then i encoded it to mpeg using tmpenc. 1
> hour = and 8 minutes of film take about 700 mb. This is reasonable and
> I tried = to create divx with mencoder, but the quality is a lot
> worse. I have = played with options all week and I cannot get good
> quality divx...=20 Can anyone show me an example of what they use when
> they create divx? = I'd like to see that to work with.

If you have quality problems, you might need to apply a noise filter.
Maybe this is what adobe does by default.  I usually have problems
encoding TV recordings if I don't use hqdn3d or denoise3d.

To get a guaranteed quality, I also always use explicit quantizers, eg
"vqmin=2,vqmax=4".

The following might give good results, with still some weight put on
creating small files.  This was ripped from some script of mine, can't
guarantee anything..:

--------------------------------------------------------------------
vbitrate=1200
sharpness=20
vqmin=2
vqmax=4
vbitrate=820
denoise="10:8:8"

cropw=688
croph=534
scalew=688
scaleh=400

mp3bitrate=128
mp3accel=0

lavcopts="vcodec=mpeg4:vbitrate=${vbitrate}:vhq:v4mv:vmax_b_frames=2"
lavcopts="$lavcopts:vb_strategy=1:vqmin=${vqmin}:vqmax=${vqmax}"
lavcopts="$lavcopts:vlelim=-4:vcelim=3:lumi_mask=0.05:dark_mask=0.1"
lavcopts="$lavcopts:scplx_mask=0.02:tcplx_mask=0.05:naq:qpel"

filters="hqdn3d=${denoise}"
filters="$filters,scale=${scalew}:${scaleh}:0:${sharpness}"
filters="$filters,crop=${cropw}:${croph}"

lameopts="cbr:br=${mp3bitrate}:aq=${mp3accel}"

mencoder -ovc lavc -oac mp3lame \
    -lameopts "$lameopts" -lavcopts "$lavcopts" \
    -vop $filters -sws 7 -o $outputfile $inputfile
--------------------------------------------------------------------

If you still have problems with quality, switch b-frames off, make
vlelim and vcelim closer to zero.  Did you have a look at
DOCS/tech/encoding-tips.txt?

David Kühling
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