Intra prediction with multiple reference lines

A method for video encoding, comprising:

• determining a reference line selected from multiple reference lines and an intra prediction mode selected from a set of potential intra prediction modes that is associated with the reference line;
• and
• encoding at least one sample of a current block based on the intra prediction mode and at least one reference sample in the reference line in a bitstream;
• and
• encoding prediction information in the bitstream, the prediction information being indicative of the reference line selected from the multiple reference lines and the intra prediction mode selected from the set of potential intra prediction modes that is associated with the reference line, wherein
• when the reference line is a non-zero reference line, a first set of potential intra prediction modes associated with the non-zero reference line includes a smaller number of potential intra prediction modes compared to a second set of potential intra prediction modes associated with a zero reference line, and
• the first set of potential intra prediction modes only includes most probable modes.

A method of processing visual media data, the method comprising:

• performing a conversion between a visual media file and a bitstream of visual media data according to a format rule, wherein
• the bitstream includes prediction information that is indicative of a reference line selected from multiple reference lines and an intra prediction mode selected from a set of potential intra prediction modes that is associated with the reference line;
• and
• the format rule specifies that
• at least one sample of a current block is reconstructed based on the intra prediction mode and at least one reference sample in the reference line,
• when the reference line is a non-zero reference line, a first set of potential intra prediction modes associated with the non-zero reference line includes a smaller number of potential intra prediction modes compared to a second set of potential intra prediction modes associated with a zero reference line, and
• the first set of potential intra prediction modes only includes most probable modes.