DXGI Screen Capture Frame Drop Prevention
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Solution Overview
Problem
Frame dropping occurs when playing Microsoft Office PowerPoint presentations in DXGI screen capturing mode due to the module's inefficiency in capturing unchanged screen data, leading to delayed image acquisition.
Innovation Solution
Monitoring screen data changes and modifying it when the duration exceeds a preset threshold to trigger immediate data capture by the DXGI screen capturing module, ensuring no frame dropping by actively adjusting the cursor position or pixel brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DXGI screen capturing mode is used for full-screen PPT capture, then screen capture efficiency is improved, but frame dropping occurs when PPT is played
Solution Approach 1:
The system performs preliminary actions by modifying screen data before DXGI captures it. When the screen is unchanged for more than a threshold time, the system proactively modifies pixel data (such as adjusting cursor position or pixel brightness) to ensure DXGI will capture the next frame, preventing frame dropping while maintaining efficient capture of actual content changes.
2Loss of energy
If DXGI captures only changed image data, then data transmission efficiency is improved, but frame dropping occurs during PPT playback
Solution Approach 1:
The system implements a feedback mechanism by monitoring screen data change duration and using this information to control capture timing. When unchanged screen data exceeds a threshold duration, the system triggers a modification to ensure capture, creating a closed-loop control that balances data transmission efficiency with frame capture timing requirements.
Data Source
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AI summary
A method and system for handling frame dropping during playing PPT. The method comprises: running the DXGI screen capturing module , acquiring a prepositioned frame in a graphics card cache (S100); acquiring screen data according to the prepositioned frame (S200); monitoring the screen data and timing a duration in which the screen data does not change (S300); and modifying the screen data when the duration exceeds a preset threshold (S400); performing screen capturing by the DXGI screen capturing module when the screen data changes (S500). During the whole process, when the duration in which the screen data does not change exceeds the preset threshold, the screen data is actively modified, so that the frame dropping of DXGI screen capturing module may be avoided when there is no change in the screen data, thereby enabling effective handling of the frame dropping during playing PPT.