[MPlayer-dev-eng] comprehensive lavcopts test - in progress.

[Michael Niedermayer]

Hi

On Monday 14 June 2004 16:59, Romain Dolbeau wrote:
> Roman Gaufman wrote:
> > So what we end up is: 99 lavcopts
> > 			       3 preopts for each lavcopt
> > 			       4 files (2 pass each)
> > 			       2 vbitrate settings (900kbit ad 1600kbit)
> > 				= 2376 tests
> >
> > Not too many, but seems quite comprehensive. Just to explain in words, 99
> > lavcopts will be tested with 3 preopts for EACH lavcopt. Those 297 tests
> > will be tested for 4 files with 2 different video bitrate settings (once
> > with 900kbit and once with 1600kbit), this makes a total of 2376 tests.
> >
> > cmd="mencoder %s %s -nosound -ovc lavc -lavcopts
> > vcodec=mpeg4:vbitrate=%s:psnr:autoaspect:vb_strategy=1:vratetol=32000:vpa
> >ss=%s: %s -o videoout/%s-%s-%s'             % (x,z,y,i+1,opt,n,x,y)"
>
> I'm missing something here. You're only going to test one option
> at a time ? In that case, I believe results won't mean much,
> as in many cases one option may change the usefullness of another.
> For instance, in my experiment, the order of quality for
> *cmp is 6>2>3 w/o qpel and mv0, but 3>2>6 w/ qpel and mv0.
> So testing those 3 separately won't make sense.
btw, it would be interresting to know how many local minima are there in your 
results
i mean cases where no single changed option leaded to an improvement

-- 
Michael
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