GPUImage视频滤镜设置亮度不起作用 [英] GPUImage video filter set brightness not working
本文介绍了GPUImage视频滤镜设置亮度不起作用的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
//整个代码看起来很好,但是movieWriter - setCompletionBlock行没有被编译。不知道它有什么问题。
//The whole code is looking fine, but movieWriter - setCompletionBlock lines are not getting compiled. Doesn't know what is the problem in it.
我过去3天试图解决这个问题,但我没有成功解决问题。
I tried to solve out since last 3 days but am not getting it successfully working.
-(IBAction)setBrightness:(id)sender
{
sleep(1);
NSURL *sampleURL = [NSURL URLWithString:_videoURLPath];
movieFile = [[GPUImageMovie alloc] initWithURL:sampleURL];
movieFile.runBenchmark = YES;
movieFile.playAtActualSpeed = NO;
filterView = (GPUImageView *)gpuView;
filter=[[GPUImageBrightnessFilter alloc]init];
[movieFile addTarget:filter];
[filter addTarget:filterView];
[(GPUImageBrightnessFilter *)filter setBrightness:brightValue];
unlink([pathToMovie UTF8String]); // If a file already exists, AVAssetWriter won't let you record new frames, so delete the old movie
NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie];enter code here
movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(320.0, 320.0)];
[filter addTarget:movieWriter];
movieWriter.shouldPassthroughAudio = NO;
movieFile.audioEncodingTarget = movieWriter;
[movieFile enableSynchronizedEncodingUsingMovieWriter:movieWriter];
[movieWriter startRecording];
[movieFile startProcessing];
[movieWriter setCompletionBlock:^{
[filter removeTarget:movieWriter];
[movieWriter finishRecording];
dispatch_async(dispatch_get_main_queue(), ^{
[_toolDelegate stringPathOfFilteredVideoFromTool:pathToMovie];
[self.navigationController popViewControllerAnimated:YES];
});
}];
}
推荐答案
这对我有用。
[movieWriter setCompletionBlock:^{
[filter removeTarget:movieWriter];
[movieWriter finishRecording];
}];
只需将以上内容替换为以下一项。
dispatch_async(dispatch_get_main_queue(), ^{
[filter removeTarget:movieWriter];
[movieWriter finishRecording];
NSLog(@"aa2233453546565");
});
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