Aurora v1 Fast

Aurora v1 Fast is the cheaper, quicker sibling of Aurora v1. Same audio-driven image-to-video trick - still in, soundtrack in, MP4 out - but the "Fast" in the name is the whole point: Runware routes it to a leaner checkpoint (creatify:aurora@fast) that trades a little final polish for speed and a smaller bill. If you're iterating on timing, lip-sync takes, or shot variations, this is the node to burn through your first ten attempts on.

The honest framing: Fast is for iteration, the full model is for the deliverable. Anyone who's done paid video work knows that rhythm - cheap passes until the take is right, then one expensive clean render. This node is the cheap pass, and it shares every socket with its full sibling, so you can swap them in and out of the same workflow without rewiring anything.

What you set

• image (required) - the starting frame as an IMAGE. Same input as the non-Fast node.
• audio (required) - the track, as a UUID or URL. Hosted URL is the low-friction path.
• positivePrompt - optional guidance for what the motion shows. This is an audio-driven model; the prompt is seasoning, not the recipe.
• CFGScale - defaults to 1. It's low-guidance by design.
• safety.mode - none / fast / full content check, off unless you need it.
• outputFormat / outputQuality - MP4 / WEBM / MOV, and 20–99 compression.

Output is a video (VIDEO) that drops straight into Preview Video or Save Video. Up to 4 results per run via numberResults.

How it works

Mechanically it's identical to every Runware node: build a request with the model AIR and taskType: videoInference, send it over REST through the SDK, pull the rendered file back as a native VIDEO. The only difference from Aurora v1 is which checkpoint Runware spins up on the other end. The title bar shows the per-run cost, which is the real way to feel the "Fast" difference - Fast runs should print meaningfully lower numbers.

Installing

ComfyUI Manager → search Runware → install → restart. Manual:

cd ComfyUI/custom_nodes
git clone https://github.com/Runware/ComfyUI-Runware
pip install -r ComfyUI-Runware/requirements.txt

No model downloads; the pack needs runware-sdk, pillow, and soundfile. API key via Settings → Runware API key, RUNWARE_API_KEY, or runware auth login.

Troubleshooting

Key-not-set errors dominate, same as the rest of the pack. If Fast's output is noticeably rougher than the full model, that's the trade you signed up for - it's the same input contract, so the fix is to render the final take on Aurora v1 proper. Audio not playing through? Check the URL/UUID is live, and that you didn't raise CFGScale and fight the model's natural behavior.