Do i need to use --direct with Megui x264?

[ben45]

Hello
I encode videos with low bitrates (980). I normally get 300fps when --direct is 'spatial' but when i change it to 'auto' in some videos it uses 'temporal' mod and slow downs to 250fps.
What is difference between spatial and temporal mod?
Does it have a BIG part on quality?


p.s: sorry for my bad English

[redwudz]

What program and format or codec are you using to encode the videos? Megui? More information would be helpful.

Someone here should know something about Spatial VS Temporal 'mod'.

[ben45]

I use Megui x264
x264 settings

program --level 4.1 --pass 2 --bitrate 950 --stats ".stats" --threads 16 --deblock -1:-1 --keyint 240 --ref 5 --qpmin 10 --qpmax 51 --vbv-bufsize 25000 --vbv-maxrate 20000 --me umh --direct auto --trellis 2 --psy-rd 1.0:0.15 --output "output" "input"

[redwudz]

I'll change your title to 'Do I need to use direct with Megui x264' and that should give you more answers.

[hello_hello]

I'm not sure if a 50fps slowdown is unexpected. "Spatial" means it's searching in the same frame. "Temporal" means it's searching adjoining frames. "Auto" means it'll do what's working best.

I tried a quick test. Only 2000 frames and a standard definition source (and my PC is slow) with the rest of x264 setting the defaults.

Spatial: 246 fps
Temporal: 235 fps
Audio: 233 fps

Not a huge difference but it'd probably increase a bit at higher resolutions, if there's a lot of motion (my test sample didn't have a lot) and when using --me umh (compared to --me hex).