x264 encoding speed expectation

MCoupeMike · Messages: 424 Registration: 12.17.2002

H.264 _is_ more complex, but still ... i get in no way thosespeed difference sXvid vs x264 - when i use few avs filters (TomsMoComp/undot/aWarpSharp/crop) with full PAL resolution, i get ~4..6fps @ Q21 on my XP 2600+. I quess x264 gets slower with higher quantizers and probably also with Npass encoding when it "moves around bits" tho. Maybe set bitrate constraints it finds very hard to achieve..

SDbboy · Messages: 2,114 Registration: 04.09.2002

x264 --bitrate 700 --ratetol 1 --threads 1 --bframe 3 --b-pyramid --ref 5 --filter -5:-5 --analyse all --8x8dct --weightb --progress -o output.mp4 input.avs gives me 3.8fps on my pentium3 866mhz (but i also did other things while it encoded)

95MMM · Messages: 2,884 Registration: 04.15.2003

Bond, what resolution is the video you are encoding there that netted you 3.8fps?

jaysonx · Messages: 362 Registration: 10.06.2003

Thanks Bond, I was worried that there was something wrong with my A64 setup. Correcting for resolution differences, your numbers fall in with mine....

M3Jokster · Messages: 5,616 Registration: 02.27.2001

I figured out what's slowing me down: the --me esa flag I used. I know the help says that it's slow, I just didn't realize it'd be that slow. Omitting that flag gives me ~5 fps. Still slow, but acceptable.

DSrugis · Messages: 2,539 Registration: 09.17.2003

too slow?

The-Great-328ic · Messages: 15,602 Registration: 06.22.2003

Hi all, I usually encode using xvid, but, yesterday I thought I'll give x264 a try. I am using GKnot as a front end. I used all the default settings of x264. It took 8 and half hours for Gone with the wind first DVD. It usually takes 4-5 hours for xvid. I have attached the GNot log file to this post. Is it the expected time it should take? I wonder if it is worth the time it takes.