veizik WAN (CUDA) v1.2.8 — Wan 2.1 & Wan 2.2 video — cuda-wan-1.2.8

Text-to-video and image-to-video with Wan2.1-T2V-1.3B, Wan2.1-T2V-14B, Wan2.2-T2V-A14B and Wan2.2-I2V-A14B on your own NVIDIA GPU. Veizik runs the models through its own native engine: no Python, no CUDA toolkit. You supply the weights; the frames are written as PNG files to the folder you name.. It also runs a resident render server with a host-loop (bin/veizik-resident) that keeps one process and one GPU context across requests, and mid-render preemption — an urgent request interrupts a running render, is served, then the first render resumes.

This page records the state as of 2026-10-28 and is not updated as the catalogue moves. For what runs now, see models.

What this build does

• veizik run <model key> "prompt" --out DIR renders a video and writes its frames as PNG files to DIR/frames/; nothing is written inside the package.
• Serve: veizik serve <model> runs a resident render server that renders request after request in one process and one GPU context, with results bit-identical to veizik run.
• Four modes: quality (the reference path and the default), balanced, fast and ultrafast.
• An interrupted render continues from its last step with --resume, and the result is identical to a render that never stopped.
• Every file of the package is checked against its sealed manifest before each run.
• GPU code for sm_80, sm_86, sm_89, sm_90a, sm_100a and sm_120a.
• Every frame it writes carries the provenance mark described in the Terms: an in-pixel watermark plus XMP DigitalSourceType trainedAlgorithmicMedia.
• Serve: veizik serve wan22_t2v_a14b --port 8000 is a render API on 127.0.0.1 (POST /v1/videos/generations with a prompt and seed returns the folder of PNG frames).
• veizik serve runs a resident render server (bin/veizik-resident) — the model loads once and is reused across requests with no reload.
• mid-render preemption — POST /v1/videos/generations with "priority": "urgent" interrupts a running render at a step boundary, is served, then the first render resumes from its checkpoint.

Models in this release

Platform

Linux on x86-64

Verification

`veizik install` checks the download against SHA-256 3fbe53c3bedb9158b00b0e1ab9a605af58a9ed5d201cefd2c0bad717ebc3d047 and refuses any other file. The release is reproducible: SHA256SUMS on the release, a single-file .vzpack with a signed .vzindex. To check veizik-wan-1.2.8-linux-x86_64.vzpack by hand, compare it with sha256sum.

File

veizik-wan-1.2.8-linux-x86_64.vzpack

Size

6,851,149 bytes

SHA-256

3fbe53c3bedb9158b00b0e1ab9a605af58a9ed5d201cefd2c0bad717ebc3d047

GPU architectures

sm_80, sm_86, sm_89, sm_90a, sm_100a, sm_120a

Run end to end on

GeForce RTX 3090 (sm_86); GeForce RTX 3090 (sm_86); GeForce RTX 3090 (sm_86)

Release

v1.2.8

Get, install, activate

# the veizik command for Linux x86-64
$ curl -fsSL https://veizik.com/install.sh | sh
# if the installer asks you to put ~/.local/bin on your PATH
$ export PATH="$HOME/.local/bin:$PATH"
# accepted names: wan, wan21, wan22 or a full model key (wan21_t2v_1_3b, wan21_t2v_14b, wan22_t2v_a14b, wan22_i2v_a14b); any case; '.' and '-' work too (wan2.2)
$ veizik install wan22
$ veizik activate

Run `veizik activate` once per device after `veizik install`. Then `veizik pull wan` fetches the Wan weights and prepares the video decoder for you — no manual VAE setup or support request. Activation itself does not need the weights; rendering does. veizik install refuses a download whose SHA-256 differs from this release. The other packages are on the download page.

Fixed issues

• Resident and long renders now resume from their saved checkpoint and continue the interrupted render — byte-identical to a render that never stopped — instead of restarting it (the resident host-loop forwards --resume).
• Checkpoints saved by a long or resident render now use a consistent render.vzckpt filename. Renders and output frames are byte-identical to 1.2.5 (engine and GPU code unchanged).
• Maintenance re-cut: the same four models and byte-identical renders as 1.2.3, with the 1.2.4 install-reliability improvements (clean archive, version-stable unpack directory, CUDA 13.x lease provisioning) carried forward.
• Online device activation works again.
• The package no longer includes macOS AppleDouble (._*) files.
• An internal verification step no longer stops a run on a benign mismatch.

Known issues in cuda-wan-1.2.8

• Model weights are not included. veizik pull wan downloads the Wan2.1/2.2 weights (Apache-2.0) and prepares the video decoder automatically — no manual VAE setup; veizik pull --prep-local DIR prepares weights you already have.
• Speed figures for this package were measured on an NVIDIA RTX 3090 (sm_86) only.
• The image-to-video model takes its input image as raw RGB bytes, one byte per channel, at exactly the render size (width × height × 3 bytes).
• balanced, fast and ultrafast are not bit-identical to quality; without --det-vae yes decoded frames may differ slightly from run to run.