x265 HEVC Encoder

[Boulder]

Originally Posted by LigH

New upload: x265 3.5+74-1ec26b9f6

[Windows][GCC 12.2.0][32/32XP/64 bit] 8bit+10bit+12bit

News since v3.5+70:

--scenecut-qp-config <file>   File containing scenecut-aware-qp mode, window duration and offsets settings required for the masking. Works only with --pass 2

I guess we need a sample file to know how it works...

Yes, the functionality looks a bit confusing to me. Hopefully someone could provide a simple use case for this.

[LigH]

Unfortunately, readthedocs is not yet up to date.

[jpsdr]

I was using --scenecut-aware-qp 3 in my scripts, and now with the new version i have a FLAW error, "invalid argument", but according the --fullhelp it's stil a valid argument...

Edit :
Has anyone else tested to check if --scenecut-aware-qp 3 is still working after these commits ?
For me this release is broken somewhere, all my encoding scripts are not running anymore.

[benwaggoner]

Originally Posted by LigH

Unfortunately, readthedocs is not yet up to date.

FWIW, there is an "Edit on Bitbucket" button at the top of all those pages. We can submit edits and additions ourselves for things that MCW hasn't documented yet or needs tweaking. I just submitted a commit to edit the weird discontinuity in the options list for --force-flush as a test.

[ShortKatz]

Originally Posted by LigH

New upload: x265 3.5+74-1ec26b9f6

[Windows][GCC 12.2.0][32/32XP/64 bit] 8bit+10bit+12bit

News since v3.5+70:

--scenecut-qp-config <file>   File containing scenecut-aware-qp mode, window duration and offsets settings required for the masking. Works only with --pass 2

I guess we need a sample file to know how it works...

There is now a sample file here: https://bitbucket.org/multicoreware/..._qp_config.txt

Its from https://mailman.videolan.org/piperma...er/013560.html

[benwaggoner]

Originally Posted by ShortKatz

There is now a sample file here: https://bitbucket.org/multicoreware/..._qp_config.txt

Its from https://mailman.videolan.org/piperma...er/013560.html

Huh. It seems odd to use an external file for just a few static parameters. Normally x265 uses external files (multi-pass-opt-analysis, qpfile) for data that can vary per-frame.

Perhaps there will be a way to specify different parameters for different frame ranges?

[Greenhorn]

Looking at the docs for the new file on BitBucket, it can get a lot more complicated that sample, so I can see why they used a file for it even if it's still static values.

(docs/rEST/cli.rst, and you have to click "Open Raw" in the little menu next to the "Edit" button since the fancy markdown version you see by default is ancient. Search for masking-strength.)

[quietvoid]

You can specify the different QP adjustments per window, and there are 6 windows now.
So the file is useful for that, but hardly IMO.

My CLI for example is already 1000 characters, so it wouldn't bother me.

[LigH]

Originally Posted by benwaggoner

We can submit edits ...

... but better do so only when we actually have a clue. I do not, in this case.

But I noticed a mailing list entry so it will happen.

[benwaggoner]

Originally Posted by LigH

... but better do so only when we actually have a clue. I do not, in this case.

But I noticed a mailing list entry so it will happen.

It still goes through the normal commit process, so MCW has a chance to review any edits. I focused on some formatting deficiencies that I'd noticed had been a common source of confusion.

[ghostshadow]

I thought there was an option to activate an automatic filling of this file with different options for each scene but the need to put them by hand from what I understand
ex : --scenecut-aware-qp 3 --masking-strength 500,2,0,200,-1,-1 in the file scenecut_qp_config.txt.
so we have to manually enter all the options per scene?

[jpsdr]

I have, just for testing, replaced :

OPT("scenecut-aware-qp") p->bEnableSceneCutAwareQp = x265_atoi(value, bError);

with

OPT("scenecut-aware-qp") p->bEnableSceneCutAwareQp = atoi(value);

No change, my log file has only one line :

x265 [FLAW]: invalid argument: scenecut-aware-qp = 3

[Boulder]

Do we still need quietvoid's patch (probably a new version of it) to make the functionality work in CRF mode?

[benwaggoner]

Originally Posted by ghostshadow

I thought there was an option to activate an automatic filling of this file with different options for each scene but the need to put them by hand from what I understand
ex : --scenecut-aware-qp 3 --masking-strength 500,2,0,200,-1,-1 in the file scenecut_qp_config.txt.
so we have to manually enter all the options per scene?

While it can be hand-edited, which is very useful for testing and early days evaluations like we are today. Production implementations would automatically generate the file based on preanalysis, like how qpfiles are most commonly used. Perhaps a future x265 will generate the file, which could be analyzed and edited as needed.

[jpsdr]

Ok, i think i understand my mistake.
I thought the new patch offered the possibility of having an external file to configure the scenecut-qp stuff.
But not, it's a necessity !
For just using --scenecut-aware-qp 3 i have to create an external file, acces it with --scenecut-qp-config and put --scenecut-aware-qp 3 inside it...
I will in my mod version restore the possibility of being able to just put --scenecut-aware-qp directly in command inside a script without the necessity to have an external file just for it (and make all my encoding scripts working again...)

[LigH]

That's all? It sounded like there is a zone control.

[jpsdr]

What i ment, it's that now you can't anymore just put --scenecut-aware-qp 3 directly in the command line, you have to put it in an external file. There is probably a lot of others possibilities with this new patch (i didn't dig to see what it's doing because i'm not using these stuff), and having the possibility of using an external file for a lot of zone description is a good thing of course, but for someone like me who was just using --scenecut-aware-qp 3, it breaks all my encode script, and to have to add an extra file just to put one command inside...

[Barough]

x265 v3.5+75
https://www.mediafire.com/file/w8xufft0b475b1t

[ShortKatz]

Originally Posted by jpsdr

Ok, i think i understand my mistake.
I thought the new patch offered the possibility of having an external file to configure the scenecut-qp stuff.
But not, it's a necessity !
For just using --scenecut-aware-qp 3 i have to create an external file, acces it with --scenecut-qp-config and put --scenecut-aware-qp 3 inside it...

Oh, really? That's stupid, who came up with that idea?

[jpsdr]

I've made a new build on my mod version (check my github).
As i have en encode running, i couldn't test it.