[BUG] SVT-AV1 not working with vapoursynth inputs (Arch Linux)

[Selur]

Hybrid uses:

"/usr/bin/vspipe" "/tmp/2025-02-25@15_50_50_1010/encodingTempSynthSkript_2025-02-25@15_50_50_1010_0.vpy" - -c y4m | "/usr/bin/ffmpeg" -y -loglevel fatal -noautorotate -nostdin -threads 8 -f yuv4mpegpipe -i - -an -sn -pix_fmt yuv420p10le -strict -1 -fps_mode passthrough -f yuv4mpegpipe - | "/usr/bin/SvtAv1EncApp" --input stdin --width 720 --height 480 --fps-num 60000 --fps-denom 1001 --input-depth 10 --profile 0 --tile-rows 0 --tile-columns 0 --progress 2 --rc 0 --crf 20 --mbr 5000 --aq-mode 2 --preset 6 --matrix-coefficients 5 --color-range 0 --output "/tmp/2025-02-25@15_50_50_1010/2025-02-25@15_50_50_1010_03.av1"

Not sure why ffmpeg is used here at all. (don't really see a reason for it atm. => did a quick test, this is also done on Windows and works - might still be unnecessary)

Does the Vapoursynth Preview work?
There is no error and SvtAV1 report it is finished with the encoding. (exit code 0)
Are you sure your SvtAV1 version works properly?
Does calling:

"/usr/bin/vspipe" "/tmp/2025-02-25@15_50_50_1010/encodingTempSynthSkript_2025-02-25@15_50_50_1010_0.vpy" - -c y4m | "/usr/bin/SvtAv1EncApp" --input stdin --width 720 --height 480 --fps-num 60000 --fps-denom 1001 --input-depth 10 --profile 0 --tile-rows 0 --tile-columns 0 --progress 2 --rc 0 --crf 20 --mbr 5000 --aq-mode 2 --preset 6 --matrix-coefficients 5 --color-range 0 --output "/tmp/2025-02-25@15_50_50_1010/2025-02-25@15_50_50_1010_03.av1"

work ?
Might be some change in SvtAv1 3.x that is causing the problem.

Cu Selur

Ps.: Will look at it tomorrow. (too groggy today)