Network video recorder and method for recording video data in the network video recorder

A network video recorder (NVR), comprising:

• at least one processor;
• a storage system;
• and
• one or more modules that are stored in the storage system and executed by the at least one processor, the one or more modules comprising:
• a setting module that sets a starting location and an end location of video data in a file, one frame of video data is recorded in one element of a storage buffer corresponding to the file and the element has an index, and sets a starting location and an end location which coincides with the index of a frame of video data in the storage buffer;
• a receiving module that receives a frame of the video data transmitted over a port of the NVR, the frame is captured by a video capturing device that is electronically connected to the NVR;
• a position update module that adjusts the starting location of the storage buffer by one element, and adjusts the starting location of the file to the starting location of the frame recorded in the storage buffer, upon the condition that the storage buffer corresponding to the file does not have enough space for storing the frame of video data;
• and
• a recording module that records the frame in the file upon the condition that the storage buffer corresponding to the file has enough space to store the frame of video data;
• and
• the position update module that adjusts the end location of the file by one frame, and adjusts the end location of the storage buffer by one element, upon the condition that the storage buffer corresponding to the file has enough space to store the frame of video data and the frame of video data is the Intra-frame.

A non-transitory storage medium having stored thereon instructions that, when executed by a processor of a network video recorder (NVR), causes the NVR to:

• set a starting location and an end location of video data in a file, one frame of video data is recorded in one element of a storage buffer corresponding to the file and the element has an index;
• set a starting location and an end location of the video data that coincides with the index of a frame of video data in the storage buffer;
• receive a frame of the video data transmitted over a port of the NVR, the frame captured by a video capturing device that is electronically connected to the NVR;
• upon the condition that the storage buffer corresponding to the file does not have enough space for storing the frame, adjust the starting location of the storage buffer by one element, and adjust the starting location of the file to the starting location of the frame recorded in the storage buffer;
• and
• upon the condition that the storage buffer corresponding to the file has enough space to record the frame of video data, and the frame of video data is the Intra-frame, record the frame in the file, adjusting the end location of the file by one frame, and adjust the end location of the storage buffer by one element.