ISXD not recognized

[mikekrause35pm]

Photon does not appear to recognize ISXD as a viable track file.

ERROR-Unsupported sequence type or schema Tag: rdd:ISXDSequence URI: http://www.dolby.com/schemas/RDD-47/2018 [Photon version: 4.8.0]

We'd like to see this supported for both mastering and distribution use cases.

[walter-arrighetti]

ISXD tracks are an essential part an IMP, where "living" (running) metadata may be stored, so it is really paramount that photon supports it. Examples of per-frame, running metadata, for either production, distribution, playback and archival/preservation usecases, are:

• tracking and other geometry changes;
• camera parameters (reel name, ISO, color temp, shooting parameters);
• scanning metadata (KeyKode, emulsion, film defects, scanner calibration);
• editorial notes;
• list of speaking characters' names (and corresponding actors' names) and their faces' positions;
• colorimetry info (LUTs, ODT/IDT/LMT, CDLs, HDR/QT/Dolby Vision parameters);
• bitrate constrains;
• any other other metadata useful for the finishing, CG, VFX, versioning/localization and mastering departments;

For a visual guide to such usecases and further technical details, see my deck for @imfug's 2019 Workshop on preserving movies with IMF at The Eye (Amsterdam, slides 8–15), where I initially proposed such broad usage of ISXD back in 2019 – as well as using SCM for "static" (composition-wide) metadata.