DJ set teaser: flyer above the booth clip, lineup as captions

To make a DJ set teaser, trim 10 to 15 seconds from a phone clip of the booth, then use timeline compose with the stack operation to put the night's flyer in the top region and the clip underneath (a 40/60 split of a vertical frame), and finally burn the set times as caption cues. Compose is $0.02 flat, trim is $0.02, and captions are $0.20 for a clip up to 60 seconds, so $0.24 in total. The audio you recorded in the room is kept.

Why stack the flyer instead of overlaying it?

Timeline compose has two operations. Overlay floats a plate over the video. Stack tiles two regions of one frame, with the still on top by default and a ratio between 0.1 and 0.9 for the still's share. A flyer is information you want readable the whole time, and a strobe-lit booth clip behind it would fight the text. Stacking keeps both clean: flyer on top, motion below.

The output length always comes from the video layer. The still stays up for the whole clip and cannot make the clip longer, and the ceiling is 300 seconds. Pick a short loop-friendly stretch, such as the drop.

What does the compose request look like?

The field that picks stack or overlay is operation, not mode (mode is the usual async or sync choice). Both URLs must already be media.sume.com files in your workspace, the image must probe as a still and the video as a video. An Idempotency-Key header is required.

{
  "operation": "stack",
  "image": { "url": "https://media.sume.com/artifacts/artf_demo/flyer.png" },
  "video": {
    "url": "https://media.sume.com/artifacts/artf_demo/booth-clip.mp4",
    "source_in": 0,
    "duration": 15
  },
  "layout": { "split": "horizontal", "image_region": "top", "ratio": 0.4 },
  "output": { "width": 720, "height": 1280, "fps": 30 }
}

What does it cost and what about the sound?

Compose uses the audio of the video layer. If the clip is mute you get a warning, not a failure. Whether you may post a venue recording is a rights question for you and the venue; Sume only cuts and composites the file you provide.

How should the lineup cues read?

Keep each cue under about six words: a name and a time, such as Doors 9 PM or Main set 11 PM. Cues carry text, start and end in seconds and skip speech-to-text, so a loud room causes no transcription errors. Burn captions after compose, because they sit on the final frame, and choose a caption placement that avoids the seam where the flyer meets the clip using the anchor_ratio design override.