Error converting ASWF sample Picchu to AAF about otio-aaf-adapter HOT 6 OPEN

Digging a little into this, all the rate changes on audio clips. The AAF exported from Resolve uses no effect to deal with the changes in edit_rate between SourceClip references. Maye the validation check of the media_reference's rate compared to the sourclip's rate is over zealous.

This AAF imports into Media Composer, but has some errors. Exception: PMM_INSUFFICIENT_MEDIA which normally mean a clip is short on media.

aws-picchu-edit_resolve.otio.aaf.zip

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Here are some test files from Avid, each file has an AAF and OTIO file to test frame rates. Each file was linked into the 24FPS project and transcoded to the original framerate of the clip.
Archive.zip
Specs Below:

Avid Project: 24 FPS
Clip 1: Cosmos 24 FPS
Clip 2: Chimera 23.98 FPS
Clip 3: Chimera 59.94 FPS

Let me know if you need anymore files, I'm happy to help out.

from otio-aaf-adapter.

There are 2 main issues here.

The first is issue is transitions currently require additional AAF metadata to output correctly. This shouldn't be necessary. Sensible defaults for a transitions should be chosen if metadata is not supplied. Transitions are done differently in AAF compared to OTIO, its get really confusing quickly :p

The second issue is difference in frame rates between a clip and media_reference. This is a little more tricky to deal with. Will need to investigate what media composer does for this. I believe it adds some kind of retime operation to keep the correct playback speed.

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Thanks @markreidvfx - I understand about the former, the latter seems more pertinent to tackle.

Would it be helpful if I can find a round-about way of getting a viable AAF (perhaps OTIO -> Resolve -> AAF?)

I was curious if in cases with mixed frame rates / time bases if AAF requires a 'conform' retiming effect added vs it just working.

I also have some contacts at Avid I can ask. I'll send them this thread.

Thank you!

from otio-aaf-adapter.

It should be a matter of creating some timelines with mixed framerate footage in Media Composer. Export AAF files of a few isolated cases and identify the structure. The audio frame rate differences is a little strange, I'm not entirely sure whats going on there.

I've only played around briefly with this project for the first time this weekend. The source media is missing things like embed timecode, so it took me a fair bit of time to relink everything with the free version of Resolve.

We could definitely look at the AAF Resolve generates for reference. I did think of doing that but haven't really dug into it.

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Attached is a cleaned up version of the Picchu Timeline
Picchu_Clean_Timeline.zip

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