gistfile1.txt

dispatch_async(_renderQueue, ^{
	[exportSession exportAsynchronouslyWithCompletionHandler:^{
		LOG_DEBUG( @"exported to %@", [exportSession.outputURL path] );
	}];
});

TEST_WAIT_UNTIL_TRUE( (exportSession.status == AVAssetExportSessionStatusCancelled ||
					   exportSession.status == AVAssetExportSessionStatusFailed    ||
					   exportSession.status == AVAssetExportSessionStatusCompleted) );

STAssertTrue( exportSession.status == AVAssetExportSessionStatusCompleted, @"export failed" );