AI video HDR and EXR export: what Sume's outputs are

Luma's Ray3.2 announcement, dated June 9, 2026, lists native HDR with 16-bit EXR export. Sume's docs describe no HDR or EXR output: its media tools return MP4 files, and exact trim re-encodes with libx264 and yuv420p. If your grade or composite needs EXR frames, do that step outside Sume.

What does Luma say about HDR and EXR?

Luma's announcement, read 2026-09-29, names native HDR and 16-bit EXR export as Ray3.2 features. The text saved for this page gives no color space, container detail or price for them, so none are stated here.

Does Sume export EXR or HDR video?

Not in the docs read. The catalog fields a video model advertises are its id, resolutions, aspect ratios, sizes, durations, frame images, input references, audio flag, seed, pricing and passthrough parameters. None describes bit depth, color space or an image-sequence export.

What do Sume's own tools hand back?

Each media tool in the docs returns an MP4, so a clip that passes through one is a delivery file, not a master.

How do I protect quality if I grade elsewhere?

Download the generated file before any Sume post step and keep it as the original. Use precision: "keyframe" on a trim only when a stream copy is acceptable, because a copy skips the re-encode; the cut may start a GOP early, so re-base against actual_start_seconds. Do color work and any EXR conversion in your own tools, on the original, and only then make the delivery MP4 you plan to publish.

See the trim docs for the cut fields and the video filter docs for what a pixel pass can change.

What is a safe handoff to a grading tool?

Keep the original as the master and treat anything Sume post-processes as a delivery copy. In practice that comes down to four habits.

• Download each generated file from GET /v1/videos/{jobId}/content and store it untouched.
• Note the frame rate of each clip. A Timeline render that omits output.fps follows the sources; a different rate repeats or drops frames.
• Run POST /v1/video-filter/check before any pixel pass; it is free and creates no job.
• Treat Timeline output as the delivery version, and rebuild it from the originals if the grade changes.