Clipping of updated MV or derived MV

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

• determine original motion information for a current block;
• update original motion vectors of the original motion information based on a decoder-side motion vector refinement (DMVR) method;
• clip the updated motion vectors to be within a first range;
• and
• perform a conversion between the current block and a bitstream representation of a video including the current block, based on the clipped updated motion vectors,
• wherein the performing a conversion comprises:
• decoding the current block from the bitstream representation or encoding the current block into the bitstream representation,
• wherein the updating original motion vectors and the clipping the updated motion vectors are performed for each sub-block of the current block, and
• wherein in case that a width and/or a height of the video block, to which the sub-block belongs, is larger than a fourth threshold, the current block is split into multiple sub-blocks.

A non-transitory computer-readable storage medium storing instructions that cause a processor to:

• determine original motion information for a current block;
• update original motion vectors of the original motion information based on a decoder-side motion vector refinement (DMVR) method;
• clip the updated motion vectors to be within a first range;
• and
• perform a conversion between the current block and a bitstream representation of a video including the current block, based on the clipped updated motion vectors,
• wherein the performing a conversion comprises:
• decoding the current block from the bitstream representation or encoding the current block into the bitstream representation,
• wherein the updating original motion vectors and the clipping the updated motion vectors are performed for each sub-block of the current block, and
• wherein in case that a width and/or a height of the video block, to which the sub-block belongs, is larger than a fourth threshold, the current block is split into multiple sub-blocks.

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

• determining original motion information for a current block;
• updating original motion vectors of the original motion information based on a decoder-side motion vector refinement (DMVR) method;
• clipping the updated motion vectors to be within a first range;
• and
• encoding the current block into the bitstream representation of a video including the current block, based on the clipped updated motion vectors,
• wherein the performing a conversion comprises:
• decoding the current block from the bitstream representation or encoding the current block into the bitstream representation,
• wherein the updating original motion vectors and the clipping the updated motion vectors are performed for each sub-block of the current block, and
• wherein in case that a width and/or a height of the video block, to which the sub-block belongs, is larger than a fourth threshold, the current block is split into multiple sub-blocks.