IPTC compositeSynthetic vs compositeWithTrainedAlgorithmicMedia

IPTC defines compositeSynthetic as a composite in which at least one element is generative AI, and compositeWithTrainedAlgorithmicMedia as media edited using generative AI. When a Timeline holds one AI-generated clip and one real clip, either could describe it, so choose by whether you edited a real file with AI or assembled new AI content with real parts. Sume's docs do not write either term into the output.

The terms next to a Timeline

Wording is from the IPTC page. The fourth column is how I would apply it to a Timeline, which is a judgement and not an IPTC rule.

How a mixed Timeline arises

Timeline places clips from Sume-hosted URLs on a single output. The Video Router can supply a generated clip. Mixing them yields a composite in the IPTC sense.

A rule of thumb in code

A small decision function, which you should adapt to your own policy before relying on it.

import asyncio

def source_type(clip_kinds):
    # clip_kinds: list of "real" or "ai" for each timeline clip
    ai = clip_kinds.count("ai")
    if ai == 0:
        return "humanEdits"
    if ai == len(clip_kinds):
        return "trainedAlgorithmicMedia"
    return "compositeWithTrainedAlgorithmicMedia"

async def main():
    print(source_type(["real", "real"]))
    print(source_type(["real", "ai"]))
    print(source_type(["ai", "ai"]))

asyncio.run(main())

Keep a record

• Store which clip came from which route in your job notes.
• Use the job metadata object for that note, since Sume keeps it on the job.
• Pick the term at export, because Sume does not embed it.