crf19 giving 35GB file

[Carpo]

I'm not entirely sure it should be that high, i know CRF gives you a rather large file but that is more than the size of the original bluray.

I checked on it this morning before i left for work at the file was at 15GB, came home and its 35GB.

What crf would people advise when backing up to 1920x1080 resolution? I have done some tests and i have found crf18/19 is great for Anime, i have also done tests on smaller clips for other movies, and i though crf19 was it, but alas.......

[CruNcher]

hehe more compression power seems it was done with a good encoder (bring your cpu to burn) or go the other route and use vbv to restrict it :) and if you don't want to fiddle around that long no nerves or time then do a 2 pass with a final bitrate target. I guess Blu-Rays Encoder improved a lot in the beginning it was easy to beat them these days it seems harder (also compressionists got better), sad that MSU does no Blu-Ray test, also Encoding houses change fast to the best solutions available, big time all the Internet sites helped that rate Blu-Ray quality that showed fairly fast which Blu-Ray was mastered in excelence (remembers the Pirates of the Caribbean Disney result that showed how powerful CC-HDE is) :D

[Carpo]

going to try with

program --level 4.1 --preset slow --tune film --crf 19 --vbv-bufsize 50000 --vbv-maxrate 50000 --output "output" "input"

somehow it was changed to

program --level 4.1 --preset slow --tune film --crf 19 --subme 7 --output "output" "input"

cant remember changing it, but meds have had me spaced for a few days, so who knows, if its still big, I'll try 21, if no luck there will try 23 :)

[mp3dom]

You should consider to use a 2pass vbr encoding to have a predicted final size, or at least use an even slower preset to target a similar quality with less bitrate.

[Carpo]

all the films already have been done as 2 pass, trying crf to see what it can do, i have done tests with slow slower and very slow, couldn't tell the difference on picture quality, only that it took longer, did ghost in the shell using the default dxva-high def on crf 18 and that went fine, using program --level 4.1 --preset slow --tune film --crf 19 --vbv-bufsize 50000 --vbv-maxrate 50000 --output "output" "input" although anime does compress very well

Will see what happens with program --level 4.1 --preset slow --tune film --crf 19 --vbv-bufsize 50000 --vbv-maxrate 50000 --output "output" "input" i'm guessing it was because it was changed

[yetanotherid]

Personally, I think a 720p encode at CRF 19 generally looks a little better than a 1080p encode at CRF 21 or higher and the file sizes are still likely to be a fair bit smaller.

If you've got the time, once you've done your 1080p encode at a CRF high enough to keep the file size reasonable, try a 720p encode at CRF 19 and compare the two. I'd be interested to see if you agree with me.

[Carpo]

will take about 20 hours to do the 1080p one, will try what you suggest after :)

[Biggiesized]

(remembers the Pirates of the Caribbean Disney result that showed how powerful CC-HDE is) :D
I'm pretty sure that Panasonic Hollywood Laboratory authored and encoded the entire trilogy. It was a very impressive encode at the time (~20 Mbps).

[Carpo]

well after doing the rips (set them both and was going to leave them but both were done overnight!!!!) 1080p creeps it, did both as crf19 (might do them as crf21, not too sure yet) and in windowed mode yes both looked the same, in full screen i did notice one or two issues, which only showed up on the 720p version, mainly dark areas, where as in the 1080p one they were not there.

So guessing it was because the profile was changed, but i still cant remember doing it, note to self and all, if your doctor changes your medication, don't do any backups :p

[Carpo]

Seems it wasn't the settings being changed it seems its just the film Aliens that is giving me issues, i am trying with --crf23, i thought one --crf was good for near everything

[kypec]

Seems it wasn't the settings being changed it seems its just the film Aliens that is giving me issues, i am trying with --crf23, i thought one --crf was good for near everything
Yep, I've experienced the same when i recently encoded whole quadrilogy -> Aliens (1986) is extremely grainy with lots of fast motion scenes therein compared to other 3 movies which came out with much lower bitrate for identical CRF.

[Carpo]

What --crf did you go with?

[multimediaman]

Well try to compress Godfather trilogy (blu-ray) with crf... :p

Just go with two pass method (possibly with vbv restrictions) if your source is very grainy and further compression is needed.

CRF is easy to use most of the time but when source is extremely grainy...

[nm]

CRF is easy to use most of the time but when source is extremely grainy...

Then compensate by using a higher CRF value. Easier than estimating a suitable bitrate.

Or degrain if the encode doesn't need to be transparent.

[multimediaman]

For example Godfather I source quality is pretty unstable. Pretty hard to estimate crf.

--slow-firstpass with crf might be better then.

[Carpo]

will do some tests on a 5 min clip see what i can work out, degraining it was on the list of things to do

[CruNcher]

simple denosing might even give a very nice reduction without destroying to much try for example --nr 900 or if you like some of the ultra placebo quality x264 fukushima edition freaks, mctemporaldenoise very slow nothing bellow with full power (burn CPU burn) :D :)