Comment information generating apparatus and comment information generating method

A comment information generating apparatus comprising:

• a video obtaining unit configured to receive a video;
• a comment input receiving unit configured to receive inputs of position information of an object in the video received by the video obtaining unit and a comment that is displayed with the object and is caused to track the object starting from a predetermined timing;
• a target time determining unit configured to determine a target time during which the comment is displayed, based on the comment received by the comment input receiving unit, the target time being a target value indicating a time length;
• an object motion determining unit configured to determine, for the object shown by the position information, a motion trajectory having a time length that is substantially equal to the target time and along which the comment is displayed with the object and is caused to track the object;
• a comment information generating unit configured to generate comment information to be output including the comment and the motion trajectory of the object determined by the object motion determining unit;
• and
• an output unit configured to output the comment information generated by the comment information generating unit.