Video Recording File Management via Play List Consolidation
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Solution Overview
Problem
BD cameras experience prolonged startup times due to an increase in the number of video files recorded, as each recording adds new files such as mpls, clpi, and m2ts, leading to increased file management and reading times.
Innovation Solution
The method involves recording video in a format that produces one Play Item per segment of video scenes without updating the Play List data each time a scene is recorded, managing these files as a set with the mpls file associated with the Play Item, and storing start and end location information, allowing for efficient file management and reduced file count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If video is recorded in a format that adds new files (mpls, clpi, m2ts) each time a scene is recorded, then video recording functionality is improved, but the number of managed files increases leading to prolonged startup time
Solution Approach 1:
Multiple management files (mpls, clpi, m2ts) that were previously stored as separate files are merged into a single management file structure. The Play List data now contains embedded references to Clip Info and Stream data, reducing the number of separate files that need to be read during startup while maintaining all necessary video recording functionality.
Solution Approach 2:
The management file is segmented into distinct data sections (Play List, Clip Info, Stream) that can be independently accessed. This allows the system to read only necessary portions of the management data during startup rather than reading entire separate files, reducing startup time while preserving detailed video scene information.
2Productivity
If the number of video recordings is increased, then video capture capability is improved, but file reading time is prolonged due to increased number of files
Solution Approach 1:
Multiple management files are consolidated into a single integrated management file, so that even as the number of video recordings increases, the system reads from one consolidated file rather than multiple separate files, preventing proportional increase in file reading time.
Solution Approach 2:
The management file is pre-organized with embedded indexes and references that allow the system to quickly locate and read only the necessary video scene data during playback, rather than reading through all files sequentially. This preliminary structuring of data reduces access time as the number of recordings increases.
Data Source
AI summary
A video recording device including: a format control section defining a video file record to produce a file via a format defined having a BDMV directory and at least directories to record the video signal and to record Play List data further arranged below the BDMV directory, and forms the format so one Play Item is produced in each of segments of video scenes to be acquired and a plurality of Play Items are arranged within one piece of the Play List data; and a recording control section recording the video information on the recording medium according to the format formed by the format control section, wherein when video acquired by the camera is recorded where a first piece of Play List data is produced, Items are produced within the first piece of the Play List data without generating a new piece of Play List data.