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V-tec
1st March 2003, 14:28
I all! This my first post... :scared: :D

a little question/request...
Why XviD don't have a built-in crop & resize options like divx?



..::Type R::.. (http://www.divxmania.it)
sam_b
1st March 2003, 14:47
Because it's not a commercial codec. 99% of people use avisynth to frameserve, which it's very good at.

There really is very little use in people using their time duplicating the features in the codec, which is not really the appropriate place for resizing functions anyway.

You also cannot preview what is being encoded easily.
V-tec
1st March 2003, 18:52
yes, but i think that the built-in crop and resize options can be optimized to work in the best manner with the codec.

I'm a hard avisynth user but sometime when I use (rarely)divx instead divx I like the boost of speed that give the internal C&R.
Acaila
1st March 2003, 19:08
As far as I know from people who compared Avisynth's resizing with DivX's internal resizing there is next to no speed advantage, and thus no reason to use it. And besides that I agree with sam_b, resizing shouldn't be done by the codec.

Do you get a significantly higher speed? And if so how much?
V-tec
1st March 2003, 19:19
about 7/8 (and more sometimes) fps on my system: AMD XP1800+ @ 1900.

but I think that is the resize filter that is faster than the avisynth filter.

Sorry for my Maccheroni English... :D
juicemansam
4th March 2003, 05:04
An old UNIX saying goes similar to this: "Do one thing, and do it good." Most of UNIX's (and work-alikes) power comes from small programs doing only one good thing, and combining the power of those programs.

I think that a codec's power lies within it's purpose.

A Gladius (ancient Roman adquired sword) was meant for one thing, killing in the fastest manner, stabbing. Would Maximus (of Gladiator) been any better with a bloated sword swiss-army-knife style sword? Probably not.

Let other programs handle other things. Wouldn't encoding an already crop/resized image be better?

Just my 2 cents.
HarryM
4th March 2003, 06:58
Only positive thing on built-in crop/resize is the using at direct grabbing into DivX.
I have idea- is possible modify Virtualdubmod for on-the-fly using of Avisynth's script??? This is compare to built-in crop/resize.