HALOWERK Waveform Image Generator

x402

HALOWERK Waveform Image Generator is a paid API for AI agents from medien.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).

Converts an audio or video file into a waveform PNG image with configurable dimensions, colors, channel splitting, and optional logarithmic scale.

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

Takes an audio or video file (up to 24 MB) and returns its waveform as a PNG image with chosen width, height, wave colour and background colour, mono or one lane per channel, optionally on a logarithmic scale that makes quiet speech visible. Rendered locally with ffmpeg; the image comes back inline as base64 along with duration and size. Nothing leaves this machine. Fixed price per call.

Output

Returns a base64-encoded PNG image of the audio/video waveform rendered inline, along with the duration of the source media and the dimensions/size of the output image. No external data transfer occurs — all processing is done server-side with ffmpeg.

Example use cases

Podcast episode waveform thumbnail

“Generate a waveform image for my podcast episode at https://cdn.mypodcast.com/ep10.mp3 — make it 1200 wide by 200 tall, use #e11d48 for the wave color and a black background (#000000), and turn on logarithmic scale so the speech doesn't disappear in quiet sections.”

Stereo music track channel visualization

“I have a stereo music file at https://audio.myband.com/track01.wav — can you render a waveform PNG showing each channel in its own lane, 1600 pixels wide and 400 tall, green wave (#22c55e) on a dark grey background (#1f2937)?”

Video file audio waveform for editing

“Extract and visualize the audio waveform from this video: https://media.myvideo.com/interview.mp4 — 1200 by 300 pixels, split channels off, default blue wave, white background, no log scale. I want to use the PNG as a timeline reference in my editor.”

Technical details

Endpoint

POSThttps://medien.halowerk.com/v1/waveform-image?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a locally rendered, privacy-preserving waveform PNG from an audio or video file with precise control over dimensions, colors, channel layout, and scale. Prefer it over client-side or third-party waveform services when data privacy matters, when you need logarithmic scaling for speech content, or when you want a fixed low-cost per-call pricing model with no data leaving the server.

Side effects

File exceeds 24 MB limit — request rejected
Invalid hex color format for wave or background color — schema validation error
Source file URL is unreachable or returns non-media content — rendering fails
Audio/video format unsupported by ffmpeg — conversion error
Width or height outside allowed range (100–4000 / 40–1000) — validation error
Both url and content_base64 omitted from source object — missing input error
base64 payload too large (over ~12 MB encoded) — payload size limit hit

Input

Schema · Request body

Field	Type	Description
color	string
width	integer
height	integer
source	object	The recording. Either url or content_base64.
log_scale	boolean
background	string
split_channels	boolean

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