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BytePlusBytePlusBytePlus ModelArk for ComfyUI

Video and Audio Assets

Template
Video and Audio Assets, in the ComfyUI template browser under BytePlus
Workflow file
Video and Audio Assets.json
BytePlus nodes
Seedance 2.5 Text to Video, Seed Audio 1.0, Create Video Asset, Create Audio Asset, Asset Library, Seedance 2.5 Reference to Video
Keys needed
ModelArk API key, Seed Speech API key, IAM access key and secret key
Also uses
Extract Text, MarkdownNote, Preview as Text, Save Video (built into ComfyUI)

What it makes

Section titled “What it makes”

One 4 second video made from two assets that live in your library. The template first creates a sample clip and a sample voice line so it runs as it is, registers both as assets, then asks Seedance 2.5 Reference to Video to continue the scene of the video while the sound follows the audio. You can swap the samples for your own media.

The workflow

Section titled “The workflow”
Four groups: Media, Register as assets, Library and Use the assets in Seedance, with a how-to note at the top left
Four groups, from the sample media to the saved video.
  1. Seedance 2.5 Text to Video (Seedance 2.0 Mini, 480p, 16:9, 4 seconds) makes the sample video from “A calm slow pan across a quiet mountain lake at sunrise, mist over the water.” A Extract Text node pulls the video link out of its response.
  2. Seed Audio 1.0 speaks “A calm narrator says: Welcome to the quiet mountain lake at sunrise.” in the preset voice Tim (Male, American English) and outputs a url for the clip.
  3. Create Video Asset and Create Audio Asset register the two links in the group “ComfyUI assets”, as “ComfyUI video” and “ComfyUI audio”. Each outputs an asset_uri and an info shown in a preview.
  4. Asset Library lists up to 10 active AIGC assets, filtered by the name “ComfyUI”, and shows their URIs.
  5. Seedance 2.5 Reference to Video takes the video asset as asset_1 and the audio asset as asset_2, with the model Seedance 2.5 Draft at 480p.
  6. Save the video keeps the result under BytePlus/Video/asset_reference.

Run it

Section titled “Run it”
  1. Add your ModelArk API key, your Seed Speech API key and the IAM access key and secret key in Settings → BytePlus if you have not yet (API keys). The template needs all three. The IAM keys need asset-library permission, and your account also needs Dreamina Seedance Advanced Creation Rights.
  2. Open the template browser and choose Video and Audio Assets under BytePlus.
  3. Press Run. The sample media is made first, then registered, then used in Seedance. The shipped template passes links from node to node, so it needs no Comfy.org login.
  4. To use your own media, paste public https links into video_url and audio_url of the two Create nodes, or connect Load Video and Load Audio to their video and audio sockets. Local uploads need a Comfy.org login: log in to your Comfy.org account in ComfyUI first.

Settings worth changing

Section titled “Settings worth changing”
  • Prompt of the final node: refer to the assets as Video 1 and Audio 1, as the template does.
  • model of the final node: Seedance 2.5 Draft renders a quick 480p preview. Pick a full Seedance 2.5 option for the final quality.
  • group_name and asset_name: choose where the assets go and what they are called. Use the same name filter in Asset Library to find them.
  • audio_url and video_url: an advanced input on each Create node that skips the Comfy.org upload when you have a public link.
  • duration and resolution: shorten or lengthen the final clip.

Example result

Section titled “Example result”
The result panel: four asset URIs from the library list, three frames of a misty mountain lake at sunrise, and the video and audio asset records as JSON with the IDs hidden
Example result: the library list, the saved video and the two asset records.
The video from this example.

Time and cost

Section titled “Time and cost”

The workflow bills one Seedance 2.0 Mini sample video, one Seed Audio clip and one Seedance 2.5 Draft video. The Asset Library node is not connected to the two Create nodes, so on the first run it can list the library as it was before the new assets existed. To see them, change an Asset Library setting (for example max_results) and run again, because ComfyUI reuses the cached list of an unchanged node. The seed controls are set to randomize, so every run makes new media and bills again. Set a control to fixed and ComfyUI reuses the cached result of an unchanged node without billing. Only use media you are authorized to use.

Section titled “Related”