DASH_DUPLICATE_REPRESENTATION_ID error when using supplemental codec with dynamic manifest

[seanbecker15]

Have you read the FAQ and checked for duplicate open issues?
Yes

If the problem is related to FairPlay, have you read the tutorial?

N/A

What version of Shaka Player are you using?

4.13.0

Can you reproduce the issue with our latest release version?
Yes

Can you reproduce the issue with the latest code from main?
Yes

Are you using the demo app or your own custom app?
Demo

If custom app, can you reproduce the issue using our demo app?
N/A

What browser and OS are you using?
Chrome macOS 14.5

For embedded devices (smart TVs, etc.), what model and firmware version are you using?
N/A

What are the manifest and license server URIs?

Will send to shaka maintainer group if necessary

What configuration are you using? What is the output of player.getNonDefaultConfiguration()?

Will include if necessary

What did you do?

Play dash with supplemental codec and <MPD type="dynamic">

What did you expect to happen?
This isn't exactly relevant, but since my laptop doesn't seem to support the supplemental codec provided by the manifest (checked using canPlayType on video element) I'd expect the video to play using the codec attribute on the representation.

The supplemental codec doesn't seem relevant to this issue since I believe it's the combination of the existence of a supplemental codec in at least one representation and type="dynamic" that results in the error (below).

What actually happened?

Error thrown DASH_DUPLICATE_REPRESENTATION_ID

Are you planning to send a PR to fix it?
If desired, sure. Based on #7720 and the tests that exist for this file it seems like there isn't coverage for type="dynamic" and supplemental codecs. Since there aren't tests for this path and I couldn't find support matrix it's unclear to me whether supplemental codecs are intended to be supported for dynamic manifests -- if support is intended then I'd be happy to contribute / figure out a fix.

[seanbecker15]

@joeyparrish @avelad

To clarify, this is really a question and bug report:

Question

Is it expected that shaka player currently supports supplemental codecs for dynamic manifests?

Bug Report

If support is intended, I think there's a defect in the dynamic manifest duplicate id check after copying the representations for supplemental codecs.