Extract settings from video

[salvo00786]

Hi... I have some m720p movies and I like how they are in good quality and low bitrate.
With mediatab, I extracted this line:

Encoding settings : cabac=1 / ref=12 / deblock=1:-2:-2 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=48 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=17 / lookahead_threads=4 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=12 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=2222 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=62500 / vbv_bufsize=78125 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00

Please can you write me the exact line code for ffmpeg, or can you help me to understand this line?

[_Al_]

Selur had some tool available that suppose to do exactly that. So you might google it.

But understand, when encoding a video, you could have some filters involved before entering ffmpeg, even in a subtle way, like denoiser etc., so encoding is less bitrate hungry. That preprocessing is not reflected in that text.

[salvo00786]

Are you talking about Hybrid?

[jagabo]

That's close to the veryslow preset with a few modifications. But just because a particular video looks good at those settings doesn't mean your video will look just as good. Modern clean animation may look good. But shaky, noisey, flickery, handheld camcorder video will look terrible.

Also be aware that those settings will not play properly on many standalone players. For example, Blu-ray doesn't support 12 reference frames, and 12 b-frames.

[poisondeathray]

selur's program is mis2x264 , which generates the commandline for x264 cli

As mentioned above , the encoding settings for low bitrate encoding are only part of the "ingredients" .

[salvo00786]

Thank you very much!!!

[salvo00786]

I have tried the software. At the end i read these lines:

Warning: a modded version of x264 was used to create this file.

The following entries got ignored:
rc=2pass since rc does not hold any useful info
filler=0

Where is this modded version of x264. Are there multiple versions?
It's possible to search for the x264 modded version in mediatab?

[poisondeathray]

Where is this modded version of x264. Are there multiple versions?
It's possible to search for the x264 modded version in mediatab?

There are builds with custom patches

Look in mediainfo for the Writing Library

[salvo00786]

In the same text of mediatab, I can read this line:
Writing library : x264 core 155 r2901 7d0ff22

Is this the exact line?

[poisondeathray]

Yes, that is r2901 . It's not a custom build. It's 5 years old - 18-Jan-2018

You will get similar results if you use one slightly newer or older in terms of the encoder only (not the filtering). Nothing has changed much in the last 10 years in terms of quality for x264, mainly just compatibility fixes, arm instructions etc..

https://download.videolan.org/x264/binaries/win64/
https://download.videolan.org/x264/binaries/win64/x264-r2901-7d0ff22.exe

[salvo00786]

Ok, thanks for the link. I downloaded it.

Now, please can you tell me how can I use the command line in Staxrip? or if i want to use this x264 as a command line?

[kayfam]

Latest versions are here: https://artifacts.videolan.org/x264/release-win64/

[salvo00786]

Ok, In Staxip I selected x264 and tweaked it, like the line from Mis2x264. Now, please can you reccomend me a downsizer from 1080p to 720p. Usually, I use Spline64, but I don't know if this is the best downsizer for movies. Please can you suggest me the best downsizer for movies? thanks.

[jagabo]

There is no best resizer for all situations. Just different resizers for different situations. If your source is very sharp downscaling with a sharp resizer like Spline64 or Lanczos will create oversharpening halos and buzzing details. A less sharp resizer will reduce those problems. If the source isn't so sharp a sharp resizer may help accentuate small details and sharpen edges.

[salvo00786]

Ok, but in my case, I have to downsize some 1080p bluray rip to 720p. I think all the bluray are sharpened enough, and for this reason probably Spline64 is excessive. Is Spline32 a better choice for my case or do you have other suggestions? Let me know

Another question is, how work Hardware Encoder. I can't find answers or documentations about this resizer that is present in Staxrip. The problem is to understand how it work.

How can I obtain constant framerate in Staxrip. Anytime that I convert a video, this goes from constant to variable.

[rrats]

thats just veryslow preset with some minor tweaks.