Extensions of inter prediction with geometric partitioning

A video processing apparatus comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:

• make a determination that a conversion between a video block of a video region of a video and a bitstream of the video uses a geometry partition mode in which the video block is partitioned into multiple prediction partitions including at least a first prediction partition;
• derive N motion information candidates using one or more sub-block merge candidates associated with the video block and adding the N motion information candidates to a motion candidate list for the video block , where N is a positive integer;
• derive, from the motion candidate list, motion candidates for the multiple prediction partitions;
• and
• perform the conversion based on the motion candidates for the multiple prediction partitions.

A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:

• making a determination that a conversion between a video block of a video region of a video and a bitstream of the video uses a geometry partition mode in which the video block is partitioned into multiple prediction partitions including at least a first prediction partition;
• deriving N motion information candidates using one or more sub-block merge candidates associated with the video block and adding the N motion information candidates to a motion candidate list for the video block , where N is a positive integer;
• deriving, from the motion candidate list, motion candidates for the multiple prediction partitions
• generating the bitstream based on the motion candidates for the multiple prediction partitions.