about AVCompositionDebugVieweriOS
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// APLCompositionDebugViewcompositionDebugView =[[APLCompositionDebugView alloc] initWithFrame:CGRectMake(0, 40, 320, 500)];![compositionDebugView setBackgroundColor:[UIColor clearColor]];[compositionDebugView synchronizeToComposition:appDelegate.videoComposition.mixCompositionvideoComposition:appDelegate.videoComposition.videoCompaudioMix:appDelegate.videoComposition.assetExportSession.audioMix]; WPJETZODISPOJ[F5P$PNQPTJUJPO "7$PNQPTJUJPODPNQPTJUJPOWJEFP$PNQPTJUJPO "77JEFP$PNQPTJUJPOWJEFP$PNQPTJUJPOBVEJP.JY "7"VEJP.JYBVEJP.JY#import "APLCompositionDebugView.h"
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