Rat 7M Videos Subject 1 - Day 1

All videos for Subject 1, Day 1 of Rat 7M. The video naming scheme is s{subject_id}-d{recording_day}-camera{camera_id}-{starting_frame_idx}.mp4. Subject ID, recording day, and camera ID match videos to the data in the motion capture and camera calibration parameter .mat files. Videos are provided in 3500 frame chunks, with the index of the starting frame in each file denoted by the {starting_frame_idx} portion of the filename. Using the 'frames' field in the 'cameras' struct inside 'mocap.mat', the corresponding video file and frame index can be calculated by used frame_idx // 3500 to get the {starting_frame_idx} and frame_idx % 3500 to get the frame in that file.

大鼠7M（Rat 7M）的受试者1第1天的全部视频。视频命名规则为：s{受试者ID（subject_id）}-d{录制天数（recording_day）}-camera{相机ID（camera_id）}-{起始帧索引（starting_frame_idx）}.mp4。受试者ID、录制天数与相机ID可用于将视频与动作捕捉（Motion Capture）及相机标定参数（camera calibration parameter）.mat文件中的数据进行匹配。视频以3500帧为单位进行分块存储，每个分块的起始帧索引由文件名中的{starting_frame_idx}字段标识。可通过读取'mocap.mat'中'cameras'结构体的'frames'字段，利用如下方式计算得到对应的视频文件及该分块内的帧索引：将总帧索引frame_idx与3500做整除运算得到{starting_frame_idx}，将frame_idx对3500取余即可得到该分块内的具体帧位置。