Hint the GC to run at the completion of each frame. This forces concurrent garbage collection which means that the likelyhood of a long GC pause while other threads are running is lower.

src/com/limelight/nvstream/av/video/CpuDecoderRenderer.java

@@ -137,6 +137,7 @@ public class CpuDecoderRenderer implements DecoderRenderer {
 					
 					nextFrameTime = computePresentationTimeMs(frameRateTarget);
 					AvcDecoder.redraw(renderTarget);
+					System.gc();
 				}
 			}
 		};