Depending on its type, an OBU can carry configuration information, metadata, or coded video data. OBUs are made of a 1 or 2 bytes header, identifying in particular the type of OBU, followed by an optional length field and by an optional payload, whose presence and content depend on the OBU type. Bitstream features overviewĪn AV1 bitstream is composed of a sequence of OBUs, grouped into Temporal Units. 4.1 General Subsample Encryption constraints.2.7 AV1 Switch Frame sample group entry.2.5 AV1 Forward Key Frame sample group entry.
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