decode the codec= string in a media mime type
supports
- HEVC (hvc1, hev1)
- AVC (avc1)
- AAC (mp4a)
- AV1 (av01)
- E-AC3 (ec-3) - no processing required
- VP9 - see https://www.webmproject.org/vp9/mp4/
- EVC - refer annex E.9 of ISO/IEC 14496-15:2019 Amd.2
- VVC - refer annex E.6 of ISO/IEC 14496-15:2019 Amd.2
- MPEG-H
- AVS3