Add example files for all MPEG extensions

[aaronfranke]

Currently, this repo defines the specs and schemas, but it does not give any example files. Without example files, it is very hard for an implementer to verify that their implementation is correct. Example files should be provided for all extensions, sufficient to provide test coverage for all of the supported edge cases.

I asked about adding example files for MPEG_audio_spatial in an MSF meeting, but I wanted to open an issue to track this work and to ensure it is not forgotten about.

• Example files for MPEG_accessor_timed
• Example files for MPEG_animation_timing
• Example files for MPEG_audio_spatial
• Example files for MPEG_buffer_circular
• Example files for MPEG_media
• Example files for MPEG_mesh_linking
• Example files for MPEG_scene_dynamic
• Example files for MPEG_texture_video
• Example files for MPEG_viewport_recommended

[ibouazizi]

Thank you for open the issue. This will be addressed at next week's MPEG meeting and the examples should be available by end of next week.

[haudiobe]

@ibouazizi offers to create some example files by the end of the week. @gurdep will help

[aaronfranke]

@ibouazizi Has there been any progress on example files? I'm not in any particular rush, but I would like to implement a few MPEG extensions over the next few months and the lack of example files is a blocker.

[nlsdvl]

One place to find and contribute some reference content implementing MPEG extensions would be 5G-MAG's rt-xr-content repository

The content is meant to be used in 5G-MAG's [rt-xr-unity-player(https://github.com/5G-MAG/rt-xr-unity-player)