[bug] CQ nvenc does not work in h265 encoding. about shutter-encoder HOT 6 CLOSED

I'm guessing in VideoEncoders.java,

` if (caseAccel.isSelected() && comboAccel.getSelectedItem().equals("Nvidia NVENC"))
{

					if (comboFonctions.getSelectedItem().toString().equals("H.264"))
					{	
						gpu = " -qp " + debitVideo.getSelectedItem().toString();
					}
					else
						gpu = " -cq " + debitVideo.getSelectedItem().toString();
				}

`

the -cq should be -qp?
( from https://x265.readthedocs.io/en/master/cli.html#cmdoption-qp )

from shutter-encoder.

That's strange, I've tested the H.265 encoding with an Nvidia GPU using CQ before uploading the new version and it was working well.

I check that monday on my company and keep you informed,
Paul.

PS: x265 is not the same as hevc_nenc encoder parameters.

from shutter-encoder.

I've done a bit of testing with various of the advanced features, and CQ does work if and only if force profile is set to main 5.0 or 5.1.
It does not work with 4.2 or lower (because I'm testing with 4k video), or with 5.2 or higher.
Profile 5.2 and 6.0 generate the exact same 347MB file (to the bit) as having force profile not set at all.
Profile 6.1 generates the same 494MB file (to the bit) no matter the CQ setting.
Profile 6.2 generates the same 499MB file (again, to the bit) no matter the CQ setting.

from shutter-encoder.

More testing:

CQ works if the video is rescaled down to 1080p.

Since the original file is HDR, I set colorimetry to HDR -> SDR and Rec.2020 -> Rec.709 - CQ did not work.

from shutter-encoder.

Testing other files, same issues (almost).
Original file was h265 10bit HDR (3840x1920 24fps)
Second file h264 8bit SDR (3840x1748) - same CQ issue
Third file - 1920x818 upscaled to 3840x2160 (letterboxed) - same CQ issue
Fourth file - 1440x1080 upscaled to 3840x2160 (pillarboxed) - CQ works.

from shutter-encoder.

Thanks for all this tests, I've run a couple of encoding and I get some differences with your results be it's true most of the time.

Long story short, I will switch to -qp for the next release as for H.264

For info I was using -cq because of this FFmpeg output:
-cq Set target quality level (0 to 51, 0 means automatic) for constant quality mode in VBR rate control (from 0 to 51) (default 0)

from shutter-encoder.