Speed Gains from Avisynth 2.5

[mixanobios]

System : Athlon 800MHz ,133MHz SDR memory CAS3

Movie : SWEP II : Attack of the clones

Cropping : 0, 72, 3, 70 (dont remember exactly)

Resizing : 640 * 272 Sharp Biqubic

Codec : xvid null setting

Avisynth 2.07 : 22fps

Avisynth 2.5 : 31fps!

Very good!!!

[JohnMK]

Exceptional for your CPU, truly. Now what are your speeds for 2-pass encodes? (i.e., the real deal).

[mixanobios]

I encoded the movie with convolution 3D(preset=moviehq), 640*272 sharp biqubic in 5hours (1st pass) and 3hours (2nd pass) the movie is 205000 frames PAL.thats about 12 and 19 fps

[JohnMK]

Pass adjusted that looks like 6 fps, approximately. (25/4). Yikes. Why convolution3d at that cost? I guess since you're not making a living at encoding, you're free to do whatever you want. ;)

[HarryM]

When you set 'AVI output buffer' (in vdubmod or vdub/nandub) to 64MB (default is only 2MB), you get a 2-5% speed gain too.

[mixanobios]

i dont understand your math. since the movie is 205000 frames (2h 17m) at 25 fps, 8 hour encoding is (2.27/8)*25=7 fps. the dvd is quite blocky (look at amidala at the scene where they kiss for the first time) and i wanted a 2 cd movie with ac3 448 audio(i dont like transcoding the ac3 since it lowers volume and normalizing isn't good. so video size is 950 megz approximately. do you know of any better (and faster) way to get a better result? i tryed many filters, tryed xvid and my final settings were the best.BTW, 8 hours is a very acceptable amount of time to encode a movie if you are sleeping. i will upgrade only when AMD's hammer is available, because it's incredible memory subsystem will give huge framerates at divx encoding.

@ HARRYM thanks for the advice, i will try it out

[JohnMK]

You understand it just fine. :) I just used liberal rounding. Notice we're within 16% of the other's estimate? We're at least within the same order of magnitude.

[mixanobios]

nevermind, what frame rates do you get?it would be nice to have a thread with some fps postings

[JohnMK]

On my P4, I average 50-80.

[Bulletproof]

When using the latest Xvid build (with all new options enabled) along with Decomb and convolution 3d on my athlon 1.7ghz cpu, I only get about 8 to 9 fps using YV12.