The logic of generating codec string for AV1 had a bug. It is giving same Codec String for all the generated manifests
![image](https://github.com/axiomatic-systems/Bento4/assets/34328635/5ccd79d2-6d6a-4c91-b4b7-40d1f1421174)

On further debugging found that the incorrect value is being returned from mp4info

https://github.com/axiomatic-systems/Bento4/blob/1529b83f89d52958b811469fc3ac5206639a3d0f/Source/C%2B%2B/Core/Ap4SampleDescription.cpp#L836



Incorrect Codec String for AV1 Streams from mp4info
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : Incorrect Codec String for AV1 Streams from mp4info
Issue date:

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The logic of generating codec string for AV1 had a bug. It is giving same Codec String for all the generated manifests
![image](https://github.com/axiomatic-systems/Bento4/assets/34328635/5ccd79d2-6d6a-4c91-b4b7-40d1f1421174)

On further debugging found that the incorrect value is being returned from mp4info

https://github.com/axiomatic-systems/Bento4/blob/1529b83f89d52958b811469fc3ac5206639a3d0f/Source/C%2B%2B/Core/Ap4SampleDescription.cpp#L836



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