Daily Archives: September 19, 2025

I’m using FFmpeg to apply a GLSL .frag shader to a video. I do it with this command docker run --rm --gpus all --device /dev/dri -v $(pwd):/config lscr.io/linuxserver/ffmpeg -init_hw_device vulkan=vk:0 -v verbose -i /config/input.mp4 -vf "libplacebo=custom_shader_path=/config/shader.frag" -c:v h264_nvenc /config/output.mp4 2>&1 | less -F but the extremely low speed made me […]