slow encoding speed with xvid rc2

[clauv]

Hello,

I speak again my pleasure and pain: xvid 1.0 rc2.

Doing a 2 pass encoding, I notice that the second pass is much longer than the first.

For example: yesterday I was encoding The Thing ( which is nearly 90 minutes long) using vdubmod with an Avysinth script.

As parameter I have used the standard parameters of xvid rc2, I've changed only the packed bitstream option (that I have unselected in order to see the film correctly even with mplayer) and I selected the option Discard first pass (anyway I don't think that the problem is due to this option since on another encoding I've deselected it and I've had the sam behaviour).

Well the first pass takes (anyway vdubmod says that) nearly 100 minutes going at 30 fps, the second pass went at 8 fps (taking more than 5 hour to complete).

With the old version of Xvid I never noticed this behaviour (even if , since normally I encode the films in the night time, I'm not quite sure how many times it takes, anyway in the morning normally I found my pc off with the encoding done).

Can anybody tell me if there is a way to speed up also the second pass?

Thank you very much...

:D

[bond]

:search: before posting

new xvid speeds up the first pass a lot with leaving out everything which is not needed for a 2pass encode

edit: its important to note that this new behaviour doesnt hurt the quality!

[sysKin]

Originally posted by clauv
Doing a 2 pass encoding, I notice that the second pass is much longer than the first.You should rather see it as the first being much faster than the second. Second pass uses full encoder's capabilities, first is as fast as possible.
If you want the first pass to be as slow as the second (why..?) go to first pass' options and select "full quality first pass" checkbox.
Can anybody tell me if there is a way to speed up also the second pass?Motion precision 3, Turbo, disable chroma motion, disable qpel and gmc, and set VHQ to 0. There is one more option which you can't disable from gui but it doesn't have big effect.

Radek

[Didée]

Originally posted by sysKin
... set VHQ to 0. There is one more option which you can't disable from gui but it doesn't have big effect.

Yes? Go on, I am all ears!

- Didée