Custom preset won't save "preset=slower"

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

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

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

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.

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…

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

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