Standard way to reference audio channels

[mrlimbic]

At the moment each NLE is adding it's own custom metadata to reference audio channels for a clip.

Something like audio channel info seems so basic to me that it should be part of the standard, rather than everyone do it differently.

Resolve method:

                        "OTIO_SCHEMA": "Clip.2",
                        "metadata": {
                            "Resolve_OTIO": {
                                "Channels": [
                                    {
                                        "Source Channel ID": 0, // <!-- Channel index within stream
                                        "Source Track ID": 0 // <-- stream index within media
                                    }
                                ]
                            }
                        },

Premiere method:

                                        "OTIO_SCHEMA": "Clip.2",
                                        "metadata": {
                                            "PremierePro_OTIO": {
                                                "AudioChannels": {
                                                    "ChannelType": "Stereo",
                                                    "SecondaryAssignments": [
                                                        {
                                                            "SecondaryChannelIndex": 0
                                                        },
                                                        {
                                                            "SecondaryChannelIndex": 1
                                                        }
                                                    ]
                                                },
                                                "OriginalChannelGroupIndex": 0, // <-- unsure what this means - audio stream index?
                                                "SourceClipIndex": 0 // <-- unsure what this means - audio stream index?
                                            }
                                        },

[jminor]

There is discussion & a proposal for adding audio channel mapping to OTIO here: AcademySoftwareFoundation/OpenTimelineIO#1962

[mrlimbic]

OK. Those look like good suggestions. I added some more suggestions for situations not covered in that (such as mapping for multicam selected audio angles and selected video angle).

..and apologies that I was opening issues on raven rather than opentimelineio.