Patent ID: 11930193
Assignee: BYTEDANCE INC.
Field: nan (nan)
Classification: CPC nan | IPC H

Claim 0:
1. A method of processing video data, comprising:
performing a conversion between a video including one or more layers and a bitstream of the video according to a rule,
wherein the rule specifies, in a process of sub-bitstream extraction to output an output sub-bitstream, whether to generate non-scalable-nested supplementary enhancement information (SEI) messages by extracting scalable-nested SEI messages from a scalable nesting SEI message is based on a first flag indicating whether the scalable nesting SEI message applies to specific output layer sets (OLSs) and a second flag indicating whether the scalable nesting SEI message applies to all subpictures or only to specific subpictures,
wherein the scalable nesting SEI message is contained in a first SEI network abstraction layer (NAL) unit contained in the output sub-bitstream, and
wherein in a case that the non-scalable-nested SEI messages are generated, a second SEI NAL unit is generated, and the scalable-nested SEI messages are extracted from the scalable nesting SEI message and are included in the second SEI NAL unit as the non-scalable-nested SEI messages.