Chrome and Firefox expect the the Opus codec name to be all lowercase. Is bento4 using the wrong codec name or is this to spec? HLS.JS currently only acknowledges the lowercase "opus" as well.

Edit: It looks like these browsers violate the MP4RA spec.
![image](https://user-images.githubusercontent.com/9325979/199804310-d88748bd-a7a5-4688-ad72-cfa054c0f6a1.png)

Browsers expect Opus codec name to be lowercase.
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : Browsers expect Opus codec name to be lowercase.
Issue date:

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Chrome and Firefox expect the the Opus codec name to be all lowercase. Is bento4 using the wrong codec name or is this to spec? HLS.JS currently only acknowledges the lowercase "opus" as well.

Edit: It looks like these browsers violate the MP4RA spec.
![image](https://user-images.githubusercontent.com/9325979/199804310-d88748bd-a7a5-4688-ad72-cfa054c0f6a1.png)

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