Custom preset won't save "preset=slower"

[Neo]

Hello all,

I’m using Shotcut 20.04.12.

I’m creating a custom preset starting with these basic settings:

format: mp4
codec: hevc_nvenc
rate control: Quality-based VBR
quality: 65%

On the “other” tab there is:
default:
movflags=+faststart

I added:
rc=vbr_hq
cq=18
preset=slower

When I click to add the preset the confirm dialog box lists these:
movflags=+faststart
rc=vbr_hq
cq=18
preset=slower
f=mp4
acodec=aac
channels=2
ar=48000
ab=384k
vcodec=hevc_nvenc
vglobal_quality=18
vq=18
g=125
bf=0
top_field_first=2
deinterlace_method=yadif
rescale=bilinear
threads=7

The issue is that when I reload the custom preset the line:
preset=slower

is no longer listed.

I’m confused how to set that option and have it saved in a custom preset… Any help would be appreciated, thank you!

Peace

Nicholas

[Austin]

It’s because slower is not a supported option.

ffmpeg -h encoder=hevc_nvenc

Encoder hevc_nvenc [NVIDIA NVENC hevc encoder]:
General capabilities: delay hardware
Threading capabilities: none
Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 rgb0 cuda d3d11
hevc_nvenc AVOptions:
-preset E…V… Set the encoding preset (from 0 to 11) (default medium)
default 0 E…V…
slow 1 E…V… hq 2 passes
medium 2 E…V… hq 1 pass
fast 3 E…V… hp 1 pass
hp 4 E…V…
hq 5 E…V…
bd 6 E…V…
ll 7 E…V… low latency
llhq 8 E…V… low latency hq
llhp 9 E…V… low latency hp
lossless 10 E…V… lossless
losslesshp 11 E…V… lossless hp

[shotcut]

It works for me, but if you do something after choosing the preset like toggle the hardware encoder it might get changed.

[Neo]

Thank you for your reply, and I was reading the wrong reference when I chose “slower”. I tried again using “preset=slow” which does look supported and the same thing happened… the preset line vanishes.

[Neo]

Thank you for your reply. All I do is save it, click on another preset, then click on the custom one I just saved and the preset line is gone…

[shotcut]

I reproduce it now and fixed it for the next version 20.06

[Neo]

Thank you very much, and for all your hard work on the software.