Vidu Q3 Pro Start End To Video (Official Edition)

The Official edition of Vidu Q3 Pro's first-last-frame node is what you graduate to when the Channel version gets too limited. It's the same quality model, but now you get seed control, a recommendation-prompt feature, and a couple of warnings you should actually read before queueing.

What this node does

BizyTRD_Vidu_Q3_Pro_Official_FLF2V_API animates between a first and last frame: give it image (the start), last_frame_image (the end), and a prompt, and Q3 Pro invents the motion in between. The tooltip for the end frame carries one detail that matters: the aspect ratio of first to last should land between 0.8 and 1.25. Push past that and you're asking the model to also do a crop/composition jump, which usually ends in a weird bridge shot.

Cloud execution like the rest of the pack - flip BizyAirPlus ON, and Q3 Pro runs on BizyAir's servers; ComfyUI uploads your frames and streams back the clip.

The inputs that matter

• image / last_frame_image - the bookends. Keep their aspect ratios within that 0.8–1.25 band.
• prompt - up to 5000 characters describing the motion.
• resolution - defaults to 720P.
• duration - 1–16 seconds.
• seed - 0 by default; -1 means "random". Set a fixed seed to reproduce a take. This is the big upgrade over the Channel edition, which has no seed at all.
• audio - on by default: Q3 syncs dialogue and SFX.
• aspect_ratio - 16:9 default, inherits from the image when unset.
• is_rec - the recommendation-prompt feature, and it's a wallet trap: the tooltip says enabling it auto-generates recommended prompts at an extra 320 gold coins per task. That's a lot for a convenience feature - check it's off unless you explicitly want the model to rewrite your prompt for you.

Plus the shared api_config (endpoint/key override) and skip_error (placeholder instead of abort).

Outputs

• video - the finished clip, ready for preview/save.
• request_id - cloud task ID.
• urls - hosted result URLs.

How to install

cd /path/to/ComfyUI/custom_nodes
git clone https://github.com/siliconflow/BizyAirPlus.git
cd BizyAirPlus
python -m pip install -r requirements.txt

Restart ComfyUI (or install "BizyAirPlus" via ComfyUI Manager). Deps: bizyair-cloudberry and bizytrd; no model files. First run: account at bizyair.ai → API key → enter when the ON button prompts (or Settings > BizyAirPlus > API Key; key at ~/.BizyAirPlus/apikey.ini).

Where people get burned

Three real ones here. The 320-coin is_rec cost is the one people hit by accident - it's a checkbox that quietly adds a hefty fee per task. The aspect-ratio mismatch between frames is the quality trap - keep the anchors in that 0.8–1.25 band. And the seed: 0 is a fixed seed, not random, so if you're getting identical-ish outputs across runs and want variety, set -1. That trips up people fresh from the Channel edition.

Pack note: BizyAir's malware reputation is leftover from a 2025 ComfyUI Manager auto-install bug - legitimate SiliconFlow pack; remove it with pip uninstall bizyair-cloudberry bizytrd, not folder deletion.