Video Encoding I Frame Insertion for Static Scene Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video encoding methods degrade encoding quality by consecutively encoding excessive P frames during static scenes, leading to inefficient data transmission.
Innovation Solution
A method that determines whether a video is in a static scene for a long time by using a sliding window to analyze motion amplitude differences, updating a static variable, and encoding an I frame when the static variable exceeds a preset threshold, thereby avoiding excessive P frames and improving encoding quality and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If P frames are used for encoding in static scenes, then encoding efficiency is improved, but encoding quality degrades
Solution Approach 1:
The patent applies dynamics by making the frame type selection adaptive rather than static. The encoder dynamically switches between P frames and I frames based on real-time detection of scene switching using motion amplitude analysis. This allows the system to optimize for efficiency (P frames) during static scenes while maintaining quality (I frames) during scene transitions, resolving the contradiction between encoding efficiency and quality
Solution Approach 2:
The patent changes the parameter of frame type selection based on detected motion characteristics. By analyzing motion amplitude differences between consecutive frames and comparing them against thresholds, the system adjusts the encoding mode (P or I frame) according to the scene's activity level. This parameter change strategy enables the system to achieve high efficiency during static periods while ensuring quality during dynamic transitions
2Manufacturing precision
If I frames are encoded during scene switching, then encoding quality is maintained, but data transmission volume increases
Solution Approach 1:
The patent applies local quality by applying different encoding strategies to different temporal regions of the video stream. I frames are selectively used only at specific locations (scene switching points) rather than uniformly throughout the video. This localized application of high-quality encoding maintains quality where needed while minimizing overall data volume, as P frames are used for the majority of static scenes
3Productivity
If excessive P frames are encoded consecutively, then encoding efficiency is improved, but encoding quality degrades significantly
Solution Approach 1:
The patent implements feedback by continuously monitoring motion amplitude between frames and using this information to control frame type selection. The system calculates motion amplitude, compares it against thresholds, and adjusts encoding mode accordingly. This feedback mechanism prevents excessive consecutive P frames by detecting scene transitions and inserting I frames when motion exceeds the threshold, thereby maintaining quality while preserving efficiency
Data Source
Figure 1~2
Figure 3~4A
Figure 4B
AI summary
This application discloses a video encoding method, apparatus, and device, and a storage medium, and belongs to the field of multimedia technologies. The method includes: determining N image frames in an image frame sequence of a video according to a sliding window; obtaining a motion amplitude difference of each image frame in the sliding window; updating a static variable according to the motion amplitude difference of each image frame in the sliding window, the static variable being used to indicate a quantity of determined consecutive static image frames; and encoding the to-be-encoded image frame as an I frame when an updated static variable is not less than a first preset threshold. This application provides a manner for determining whether a video is in a static scene for a long time, where an I frame is encoded when it is determined that the video is in a static scene for a long time, to avoid interposition of excessive P frames, so that both encoding quality and encoding efficiency are improved.