vapoursynth-vszipcl 1.2.0

VapourSynth Zig Image Process — OpenCL

vapoursynth-zipcl

vszipcl is a VapourSynth plugin written in Zig that provides OpenCL-accelerated video filters. Each filter is a faithful port of an established reference, verified bit-exact where the reference allows, and shares one fast architecture (a shared cl_context, a prewarmed per-stream resource pool, and a num_streams knob that actually scales on the GPU).

All filters accept 8/16-bit integer, 16-bit half, and 32-bit float input and are multi-plane (Gray / YUV / RGB, subsampled chroma). Every filter also takes device_id and num_streams.

READ THE DOCS

FILTERS

• Bilateral: OpenCL port of VapourSynth-BilateralGPU — bit-exact on integer input.
• Deband: OpenCL port of placebo.Deband (libplacebo's pl_shader_deband).
• EEDI3: Edge-directed interpolation (EEDI3 vertical, EEDI3H horizontal).
• GaussBlur: Separable Gaussian blur.
• NLMeans: Non-local means denoiser, matching KNLMeansCL.

BENCHMARK

1080p YUV420, filter-bound, RTX 3070 Ti (num_streams=2). vszipcl leads every head-to-head, and integer/half wire formats are often faster still (they move fewer bytes over PCIe). Full per-format tables (u16/f16/f32 × num_streams 1 & 2) with methodology: Benchmarks.

Filter	Reference	vszipcl vs reference
Bilateral	bilateralgpu (CUDA)	2.2× (u16), 1.2× (f32); f16 vszipcl-only
Deband	placebo (libplacebo / Vulkan)	1.35–1.55× (u16/f16/f32)
EEDI3 / EEDI3H	vszip (CPU)	1.35× (f32); u16/f16 vszipcl-only
NLMeans	nlm_cuda / knlm	1.7× / 2.0×; f16 vs knlm only
GaussBlur	none installed	σ=1 ~522, σ=100 ~266, σ=250 ~148 fps (u16)