CRF with MeGUI Advice

[Gamestar]

I recently started backing up my blu-ray and encoding it to put on my Network Drive to watch on my PC/TV easily and got into CRF encoding. I love the outcome and encoding time.

I use CRF 21 with a Medium Preset. I was wondering if the medium preset is good enough or if I should switch to slow. I was also wondering when encoding with CRF, which rate gives you the best results? I goggled and found that 18 is perfect so what kinda result will 21 give?

I've been encoding stuff like comedy movies which doesn't have a lot of CGI or require a lot of bit rate so if I were to encode something like Iron Man, would I need to drop the CRF rate down to like 20 or 18 for that?

Thanks a lot. I hope that you can offer some assistance or feedback.

[RunningSkittle]

Use your eyes! Slower preset will be slower but quality may be better :) Lower CRF will be higher quality at the sacrifice of bitrate, but again use your eyes to judge what is acceptable for your source.

[Gamestar]

I did test and I can't really see the difference between 20 and 21. I did 2 tests and they both look the same and the 20 came up to be like 10MB bigger. I was a little confused. LOL. I guess i'll stick to 21 even for sifi stuff.

I also did Undot() minimal noise and the size was 3MB smaller with the file that didn't have the undot minimal noise. That's not a big issue though. I find that the noise preserve details and helps moving scenes.

[Usedocne]

Did you check fades, though?

[Gamestar]

Did you check fades, though?

What do u mean by fades?

[Selur]

he means that fade-in, fade-out and cross-fades might not look too good when using higher crf values,..

[Gamestar]

Ooh. I'll check those right now. I was also wondering what's the best resize filter to use. Here's an example of my current script. Also, do I really need to do minimal noise, is it recommended?

# Set DAR in encoder to 194 : 81. The following line is for automatic signalling
global MeGUI_darx = 194
global MeGUI_dary = 81
LoadPlugin("\tools\dgavcindex\DGAVCDecode.dll")
AVCSource("\Desktop\00001.dga")
#deinterlace
crop( 0, 140, -4, -140)

LanczosResize(1920,800) # Lanczos (Sharp)
#denoise

[Selur]

http://svn.int64.org/viewvc/int64/resamplehq/doc/kernels.html might help with the resizer question,...

[Gamestar]

http://svn.int64.org/viewvc/int64/resamplehq/doc/kernels.html might help with the resizer question,...


Thanks for that. From reading and the charts, i'll probably move to Spline36.

[kypec]

Thanks for that. From reading and the charts, i'll probably move to Spline36.
Good choice. I've picked Spline36 as well long time ago when no such graphs existed. I've compared few Avisynth resizers and chose the one that pleased my eyes most :p

[Gamestar]

Good choice. I've picked Spline36 as well long time ago when no such graphs existed. I've compared few Avisynth resizers and chose the one that pleased my eyes most :p

Cool. that makes me feel better about my decision. :thanks:

I was also wondering if it's a good idea to do Undot() # Minimal Noise. Does it remove any of the details. I don't really see a difference with it only a little grain is removed when I use it.

EDIT: Never mind, I found the answer here (http://forum.doom9.org/showthread.php?t=51836). This topic can now be closed. ^_^ Thanks a lot for your inputs everyone.