IP Camera Video Recording Timestamp Synchronization
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Solution Overview
Problem
Video recording in Internet Protocol cameras is unstable due to frame loss and uneven frame rates caused by time-consuming image analysis, leading to poor video playback smoothness.
Innovation Solution
A method that compares the relative timestamp of images uploaded by an image sensor with the recording timestamp of video frames, determining the appropriate image to record based on the comparison result to ensure synchronization and stability, thereby maintaining a consistent frame rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If video recording is performed directly according to images reported by the image sensor, then recording simplicity is maintained, but frame rate stability deteriorates due to uneven image reporting time
Solution Approach 1:
The system pre-generates recording timestamps according to a preset frame rate before actual recording occurs. This preliminary timestamp generation establishes a stable time baseline that guides subsequent image selection and recording operations, ensuring frame rate stability without complicating the recording process
Solution Approach 2:
Recording timestamps serve as an intermediary mechanism between the image sensor's uneven image reporting and the video recording process. By comparing image timestamps against these intermediary recording timestamps, the system selects appropriate images for recording, thereby stabilizing frame rate while maintaining operational simplicity
2Adaptability or versatility
If image analysis is performed for complex functions, then functional capability is improved, but image reporting time increases causing frame loss
Solution Approach 1:
The system pre-generates recording timestamps according to a preset frame rate before actual recording occurs. This preliminary timestamp generation establishes a stable time baseline that guides subsequent image selection and recording operations, ensuring frame rate stability without complicating the recording process
Solution Approach 2:
The system performs selective image recording based on timestamp comparison rather than recording every image. By recording only those images that meet the timestamp criteria, the system reduces the overall recording burden and processing time while maintaining video quality, effectively mitigating the time loss caused by image analysis
3Productivity
If images are recorded without timestamp comparison, then recording speed is maintained, but video playback smoothness deteriorates due to frame loss
Solution Approach 1:
The system implements a feedback mechanism by comparing image timestamps against pre-generated recording timestamps. This comparison provides real-time feedback on whether an image should be recorded, allowing the system to maintain high recording speed while ensuring that only appropriate images are selected, thereby guaranteeing video playback smoothness
Solution Approach 2:
The system pre-generates recording timestamps according to a preset frame rate before actual recording occurs. This preliminary timestamp generation establishes a stable time baseline that guides subsequent image selection and recording operations, ensuring frame rate stability without complicating the recording process
Data Source
AI summary
Disclosed are a video recording method, a video recording device, an Internet Protocol camera and a storage medium. In this disclosure, a relative timestamp of a current image uploaded by an image sensor is compared with a recording timestamp of a current recording frame, then an image to be recorded corresponding to the current recording frame is determined according to a comparison result, and finally video recording is performed according to the image to be recorded.