What does extracting audio from a video cost by API?

Audio detach is $0.01 per job on Sume's public rate. The docs give it as a per-job price, run on worker ffmpeg with no provider inference; confirm the live value in GET /v1/catalog. Timeline audio (concat or split) is also $0.01 flat per job.

What does a batch cost?

Multiply jobs by one cent. This is arithmetic on the per-job rate in the Audio detach docs, not a separate price list.

Does the format or range change the price?

The docs list one rate: $0.01 per job. format (wav or mp3 at 128 kbps), range, channels and sample_rate are options on that job, and the docs attach no extra charge to them.

What about the video render?

A Timeline 1.0 render is priced separately: $0.10 per ceil(output minute) in the Timeline docs, with an unbilled /plan preflight that reports estimated_cost_usd_micros.

Where do I confirm a price?

Sume's docs name GET /v1/catalog as the live check for both audio jobs.

curl https://api.sume.com/v1/catalog \
  -H "Authorization: Bearer $SUME_API_KEY"

How does the job run?

Audio detach defaults to mode: "async". Pass mode: "sync" to wait up to 30 seconds for a 200 finished job, or you get 202 and poll GET /v1/jobs/:id/status and GET /v1/jobs/:id/result. There is no GET /v1/audio-detach/:id. Idempotency-Key is required. The result is kind: audio_detach with audio_url, duration_seconds, format, channels and sample_rate; sample_rate is null when you omitted it and the source rate was inherited. The docs give the fee per job.

Detach is not clip inspection. For probing, stills or transcripts use video inspect; for a new MP4 cut use video trim, described in the Audio detach docs.