DivX5 fails @ high motion scenes

[Laryllan]

Of course, DivX5 produces best picture quality - as long as there is little or low motion.
Compared to my SBC settings it fails disgracefully.
So, if anyone can report about any results regarding the "Data Rate parameters", please do so. I played with the values, encoded and encoded but none of them is able to (really) give more bits to high motion scenes. It look as if there is a hard-coded motion detection routine built into the codec that cannot be changed.

My DivX5 results so far (concerning DRC):
-RC reaction period, frames:
the only difference I can tell is that it´s degrading the smear-effect (imagine a hand wiping over a white table; the hand has a shadow of crispy-white noise). The lesser the value, the less smearing.
- Rate control down/up reaction: cannot tell any difference and tried values between 1 and 400...

So as long as the codec performs so poorly @ high motion, i´ll stick to DivX 3.11 SBC.

Ah, yes, I forgot: Naturally I´m using 2-pass in DivX5.

[philippas]

You should try XVID it's better than divx5 and nandub(This comes from a fun of nandub).

[Caddis]

I'm not very impressed with hi motion scenes either. Or the rediculasly hi cpu usage compared to SBC for the poor quality improvements.
I'm hoping Xvids next major version will be a good improvement.

[Laryllan]

And so I continued testing:

Even the max. quatizer has no visible effect on high motion scenes. I tried values between 4 and 10...

Seems like NO Rate Control value has ANY effect in 2-pass encoding.

[ProfDrMorph]

And so I continued testing:

Even the max. quatizer has no visible effect on high motion scenes. I tried values between 4 and 10...

Seems like NO Rate Control value has ANY effect in 2-pass encoding.

You're right. That's why these options where called "1-pass encoding options" in DivX4. I wonder why they changed the label for DivX5.

[ppera2]

I encoded 3 movies until now with DivX 5 pro.
Use GMC and bidirectional encoding checked. Quarter pixel not.

First was Any Given Sunday - 2.5 hrs, I encoded it with 570 kbps, 704x304 and result was amazing good. And this movie has lot of fast motion scene.

Dead Calm - 105 min, I don't see any improvement here.

Purple Rain - encoded first with 704x416, and result is lot of bugs in motion, short freezes, skips etc. Then encoded in 640x384 and it is OK.

So, I get best result with fast movement filled movie.

[zulu]

(...) 2.5 hrs, I encoded it with 570 kbps, 704x304 and result was amazing good


such a high res in combination with such a very low bitrate? amazing good? are u sure? :eek:

[ppera2]

Yeah, I was surprised... By watching it on TV it was very good.
By watching it on monitor, only less detail was noticable.

[Laryllan]

All the problems are gone since v5.02.
The codec is now far superior to the SBC DivX3 method. Even if I should warn you NOT to encode comics/animes/animated movies in DivX5. Use DivX3/SBC instead.

[Acaila]

Even the max. quatizer has no visible effect on high motion scenes. I tried values between 4 and 10...

That's becaue 80% of the time DivX5 uses (almost) only quants 2-4, especially if you use B-frames (B-frames override the max quant though). Restricting it from 10 to 4 isn't going to change anything.

Watch the log for the quant distribution and you'll see that you can safely restrict max quant to 5 for 99% of the movies.