temporal smoother and XviD

[Teegedeck]

I'm answering MaTTeR's question from the 'guide'-thread here, 'cause this hardly got to do with the guide, anymore:

Originally posted by MaTTeR

Question- Has anyone tried using the temporal smoother filter in AVS yet? I've been using it with DivX3 for awhile now with excellent results. However, it appears that I might not need to use it with XviD as it does a much better job.

temporal smoother has just the same effect in .avs-scripts for use with XviD as it has for DivX3- it increases compressibility by reducing noise but adds a slightly unnatural look starting at (3) or (4), depending on your taste... Perhaps it's best to make a compressibility test without temporal smoother, first, and only use temporal smoother if the source compresses badly.

[MaTTeR]

Thanks for the feedback. I suspect using a value of 1 should work perfectly for most of my 1 CD rips that are noisy.

I must say I don't see as much of a need for the filter as I did in DivX3 though. I'm just judging the appearence and not the compressibilty aspect.

[ChristianHJW]

Originally posted by MaTTeR
I'm just judging the appearence and not the compressibilty aspect.
Unfortunately the two are always linked together my friend. If you improve the compressability of your movie, by f.e. using only tempsmoother(1) before resizing the codec can use the saved bits for better crispness and colours .... dont forget we have 24 frames per second or more, if there are subtle changes from one frame to the next you can never see those because our eyes are too slow for that, but they are ( unnecessary ) stress for the poor codec .... its simply noise that gets encoded ....

For NTSC movies being TV sources ( no iVTC possible ) i even recommend a tempsmoother(4) - (6) in any case because a 29.9x fps frame rate is so muczh faster than the human eye .... you simply won't be able to see the filter's effect but it will improve compressability a lot and such of course also the overall picture quality.

[MaTTeR]

Thanks for the detailed explanation Chris. I'm going to do some testing with XviD and some different temporal values. I think your right though...most likely I'll find that the filter is just as useful with XviD as it was with DivX.

[Dali Lama]

I too enjoy the increased picture quality that temporal smoother provides at low settings (ie 1). I can say it is definitely useful in Xvid.

However, how about using one of the more highly optimized smart smoothers like 3d cleaner for example. I think at a low threshold of 5 and radius of 1 and 1 it will provide even better results and better compression times.

Dali