Method, device, and medium for video processing

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 perform a method comprising:

• determining, during a conversion between a target block of a video and a bitstream of the video, a first prediction and a second prediction associated with the target block, the target block being applied with a multiple hypothesis prediction coding mode;
• applying a process associated with a template of the target block to the target block by blending the first and second predictions;
• and
• performing the conversion according to the process associated with the template,
• wherein the first prediction of the template is blended with the second prediction of the template, if one of the followings is calculated:
• a template matching cost of the target block,
• a template matching distortion of the target block, or
• a template matching error of the target block.

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

• determining, during a conversion between a target block of a video and a bitstream of the video, a first prediction and a second prediction associated with the target block, the target block being applied with a multiple hypothesis prediction coding mode;
• applying a process associated with a template of the target block to the target block by blending the first and second predictions;
• and
• performing the conversion according to the process associated with the template,
• wherein the first prediction of the template is blended with the second prediction of the template, if one of the followings is calculated:
• a template matching cost of the target block,
• a template matching distortion of the target block, or
• a template matching error of the target block.