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The existing code attempts to clear the frame by painting in OVER mode with transparent black - which is a no-op. As a result if you have many input frames (e.g. you're using a sequence of svg files), you'll start to see new frames drawn over old frames as memory gets re-used. Switch the code to paint using the CLEAR compositing operator, which fills every channel with 0 values (setting a source colour is not required).
4.4 KiB
4.4 KiB