Implement SEI messages and frontend config to inject Alpha metadata in the stream #1
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Based on: * H.274-202309 - 8.23 * T-REC-H.266-202309 - Annex D
Based on: * H.274-202309 - 8.19 * T-REC-H.266-202309 - Annex D
* vvencFFapp: add SEI options for sdi and aci * SEIEncoder: write leading SEI sdi and aci messages on the slices
ylatuya
reviewed
Jul 21, 2025
| MaxLayers : 2 | ||
| MaxSublayers : 7 | ||
| AllIndependentLayersFlag : 1 | ||
| #======== Alpha ================ |
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When adding an alpha channel layer, you would always want to send the SDI and ACI SEI messages, I don't think this should be configurable by the user. A better configuration interface would be the ability to define what layer is the alpha channel one:
#======== Layer-0 ===============
LayerId0 : 0
#======== Layer-1 ===============
LayerId1 : 1
#======== Alpha layer ================
LayerAlpha : 1
AlphaLayedId0
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Implements Alpha related SEI messages to be injected into the stream
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