Capture: frame drop

Scenario: capturing is running in the background, and keep making captured buffers available to applications. The application gets one frame, display it, and get another frame, display it…


theory: 60fps capture + 60fps display

in practice: display rate is slightly slower than capture rate.

If the application asks for a captured buffer, only after the previous one being displayed. the frame dropping occurs inside capture part;

if the application doesn’t wait the previous frame being displayed, the frame dropping will occur on the display side.

Screen shot 2015-06-02 at 10.14.57 AM

VSYNC interval is 17.183ms

Screen shot 2015-06-02 at 10.28.11 AM

Capture interval is 16.652ms

Screen shot 2015-06-02 at 10.29.56 AM


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