Bytedance Seedream V4 Edit Sequential

Editing is usually a one-in, one-out affair. Seedream V4 Edit Sequential flips that: you feed it up to 10 reference images and one edit instruction, and it returns a consistent batch of 1 to 15 edited images at $0.027 each. Think "give every shot in this set the same treatment" - a uniform color pass, a consistent background swap, the same character re-styled across a contact sheet - in a single billed call.

It's part of the ERPK Collection, the community pack wrapping the WaveSpeed AI API. Cloud-computed, no local model.

How it works

You provide an edit prompt, a max_images count, and optionally up to 10 image_urls. The node auto-appends the image count to your prompt (same quirk as the rest of the Sequential family), sends the batch job to WaveSpeed, and returns an images IMAGE tensor - a batch of edited frames for a batch-aware save or preview node.

The interesting asymmetry: the input is a comma-separated URL list (or an array), while the output is a proper tensor batch. So you'll usually be sourcing references from web-accessible URLs, and consuming the result through ComfyUI's native image plumbing.

The inputs that matter

• prompt - the modification applied to the set. Keep it one coherent instruction ("change the sky to dusk, keep everything else") so the batch stays consistent.
• max_images - 1–15, default 4. Auto-appended to the prompt; don't write the number yourself.
• image_url - reference images to edit. Optional - a single URL or a comma-separated array, up to 10. If you leave it empty, the node edits from the prompt alone.
• size_preset / width / height - presets or Custom (320–4096, default 1408). The edit output canvas.
• seed - cache control, randomizes by default.

Install

cd ComfyUI/custom_nodes
git clone https://github.com/eRepublik-Labs/comfyui-nodes-erpk.git erpk
cd erpk
pip install -r requirements.txt

Or ComfyUI Manager → search erpk → ERPK Custom Nodes. WaveSpeed key with credits via right-click canvas > ERPK Settings (Settings > ERPK > API Keys).

Common issues

• References not applying - the URLs must be reachable by WaveSpeed's servers. A local path from your machine won't resolve.
• Edited set lost consistency - one instruction across many images is a lot to hold. The more uniform your source images, the more uniform the result.
• Saving the batch - again, the images output is multi-frame; use a batch-aware saver or split first.
• "Why is my fixed-seed batch identical?" - cache control. Randomize for a fresh billed run.

Where this shines is retouching a series - product line shots, a storyboard, a set of design mockups - with one uniform edit. Single-image edits are cheaper and simpler on the plain Seedream V4 Edit node; this is the batch-mindset version.