PS5 limitation causing playable variants to be dropped

[littlespex]

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

What version of Shaka Player are you using?
4.2.x

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?
Custom app

If custom app, can you reproduce the issue using our demo app?
No, the issue is device specific

What browser and OS are you using?

• Device: PS5
• OS: Prospero
• UA: Mozilla/5.0 (PlayStation; PlayStation 5/4.00) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15

What are the manifest and license server URIs?

Available upon request

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

Default

What did you do?

Load a DRM protected stream that produces 20+ variants in the period flattening process.

What did you expect to happen?
All playable variants are available via player.getVariantTracks().

What actually happened?

Playable variants are dropped.

[littlespex]

One potential fix that we have tried is to cache the results of requestMediaKeySystemAccess in the decodingInfo polyfill because there are many codec/drm combinations that repeat.

Can anyone think of any potential drawbacks to this approach?

[joeyparrish]

😭

[littlespex]

This issue is addressed by a previous fix: #4708