Surveillance Video Playback Speed Control via Object Trajectory Metadata
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Solution Overview
Problem
In surveillance systems, users face inefficiencies when searching for specific objects in videos due to the need for manual playback control, often resulting in incorrect timing and repeated rewinding, as human response times do not align with video playback, leading to frustration and inefficiency.
Innovation Solution
A video playback method that utilizes metadata to record and analyze object trajectories, allowing for sections of the video to be played at different speeds, enabling automatic slow-motion playback when an object of interest appears, thereby enhancing user experience by reducing the need for manual control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual playback control is used to search for target objects, then users can control video playback, but human response time causes incorrect timing and repeated rewinding
Solution Approach 1:
The system automatically detects target objects and adjusts playback speed without requiring manual user intervention. The playback control system serves itself by autonomously identifying when to slow down or speed up based on detected object positions, eliminating the need for human operators to manually control playback timing.
Solution Approach 2:
The system continuously monitors object positions in the video feed and uses this feedback to dynamically adjust playback speed. When objects are detected in critical positions, the system automatically slows down playback; when objects are not present or in non-critical positions, it speeds up playback, creating a closed-loop control system that optimizes search efficiency.
2Speed
If fast forward playback is used to quickly locate target objects, then playback speed increases, but users miss detailed observation opportunities
Solution Approach 1:
The playback speed is dynamically adjusted based on real-time object detection results. The system automatically transitions between different playback speeds (fast forward, normal, slow motion) depending on whether target objects are detected in critical positions, allowing both rapid scanning and detailed observation without manual intervention.
Solution Approach 2:
The system performs preliminary object detection and analysis during fast forward playback to identify potential target objects before they become the focus of detailed observation. This allows the system to prepare for upcoming critical moments by pre-detecting objects and planning appropriate playback speed adjustments.
3Measurement precision
If repeated rewinding and searching is performed, then users can find clear views of target objects, but search efficiency decreases
Solution Approach 1:
The system automatically performs the repetitive task of rewinding and re-searching by detecting object positions and controlling playback accordingly. Instead of requiring users to manually rewind and search multiple times, the system autonomously identifies target objects and adjusts playback to ensure clear observation, eliminating the need for repeated manual search cycles.
Solution Approach 2:
The manual mechanical operation of rewinding and searching is replaced by an automated computer-controlled playback system with object detection capabilities. The system uses software-based object recognition and automated playback control to substitute for the manual mechanical search process, significantly improving efficiency while maintaining detection accuracy.
Data Source
AI summary
A surveillance system and method are provided. The surveillance system includes a video capturing device and a processing device. The video capturing device obtains a video and generates metadata associated therewith. The metadata records a trajectory of an object appearing in the video. The processing device executes the video playback method, namely to obtain the metadata, define a section on the trajectory based on information of the trajectory, command a player to play the video by a first speed when the object appears on the section, and selectively command the player to play the video by a second speed when the object appears on the trajectory except the section.