我在运行GPUImage时遇到问题。我修改了SimpleVideoFileFilter程序(用chromakeyfilter替换过滤器)并使用我自己的视频。由于以下错误,我的程序正在终止:
[AVAssetWriter startWriting]状态为3时无法调用方法
我已经浏览了论坛,但不确定为什么moviewriter正在关闭,然后有人写信给它。
我正在使用运行iOS 7.0的iPhone4
任何线索都非常感谢。非常感谢!
检查目标文件是否已存在。如果是,请将其删除。
我试图将文件添加到不存在的目录中。示例:/Videos/Video.mov,只留下/Video.mov工作。
好的,我有一些想法给你。
当你说“它只显示一个帧并且从不播放视频”时,我们很好地指出你的整个处理流程从开始到完成只有一次功能,然后停止工作。
这告诉我们你正确地将事物串在一起,但是一些组件的存在时间不超过单个帧缓冲周期,随后整个过程停止。
它看起来像filter
和movieWriter
的范围(我假设它们不是缺少下划线的属性,_filter and _movieWriter
)。所以他们将在这个方法完成后继续生活(如果我错了,请纠正我......)
我认为你遇到麻烦的地方是你的(GPUImageView*)displayView
这可能应该声明为类属性(虽然它可以只作为一个变量)然后通过视图控制器的nib或viewDidLoad方法实例化。
正如你现在所知,这一行:GPUImageView* filterView = (GPUImageView*)displayView;
正在为filterView做一个未使用的赋值(因此不必要)。目前尚不清楚displayView
是否真的是GPUImageView
的一个实例,或者当前方法结束时它是否仍然存在。 (实际上你说它“是我以编程方式创建的UIView”)
displayView必须是GPUImageView的子类才能完成整个工作,并且必须将其作用于类,而不是方法。
声明如下:
@property (strong, nonatomic)GPUImageView* displayView;
然后实例化它并将其添加到viewDidLoad
中的视图层次结构中
movieFile1 = [[GPUImageMovie alloc] initWithURL:movieFileURL1];
movieFile2 = [[GPUImageMovie alloc] initWithURL:movieFileURL2];
movieFile2.runBenchmark = YES;
movieFile2.playAtActualSpeed = NO;
filter = [[GPUImageChromaKeyBlendFilter alloc] init];
[(GPUImageChromaKeyBlendFilter *)filter setColorToReplaceRed:0.0 green:1.0 blue:0.0];
[(GPUImageChromaKeyBlendFilter *)filter setThresholdSensitivity:0.4];
GPUImageView *filterView = (GPUImageView*)displayView;
[filter addTarget:displayView];
[movieFile1 addTarget:filter];
[movieFile2 addTarget:filter];
NSString *pathToMovie = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Movie.m4v"];
unlink([pathToMovie UTF8String]);
NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie];
movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(1920.0, 1280.0)];
[filter addTarget:movieWriter];
movieWriter.shouldPassthroughAudio = YES;
movieFile1.audioEncodingTarget = movieWriter;
[movieFile1 enableSynchronizedEncodingUsingMovieWriter:movieWriter];
[movieWriter startRecording];
[movieFile1 startProcessing];
[movieFile2 startProcessing];
[movieWriter setCompletionBlock:^{
[filter removeTarget:movieWriter];
[movieWriter finishRecording];
}];
if (outputPath) {
finalURL = [[stongObj tempFileURL] copy];
DebugLog(@"Start Filter Processing :%@",finalURL);
DebugLog(@"movieUrl :%@",movieUrl);
// [CSUtils removeChuckFilePaths:@[outputPath]];
//Create Image Movie Object
_movieFile = [[GPUImageMovie alloc] initWithURL:outputPath];
//_movieFile = [[GPUImageMovie alloc] initWithURL:[[NSBundle mainBundle] URLForResource:@"videoviewdemo" withExtension:@"mp4"]];
_movieFile.runBenchmark = NO;
_movieFile.playAtActualSpeed = YES;
_movieFile.delegate = self;
//Movie Writer Object
_movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:finalURL size:CGSizeMake([UIScreen mainScreen].bounds.size.height,[UIScreen mainScreen].bounds.size.height)];
//_movieWriter.delegate = self;
//Create Selecetive GPU Image Filter
[stongObj setGpuOutputFilter:selectedVideoFilterType];
//Create Group Filter
groupFilter = [[GPUImageFilterGroup alloc] init];
[groupFilter addTarget:imageOutputFilter];
// Only Single Filter is implemented.
//Apply Initial and Terminal Filter
[(GPUImageFilterGroup *)groupFilter setInitialFilters:[NSArray arrayWithObject:imageOutputFilter]];
[(GPUImageFilterGroup *)groupFilter setTerminalFilter:imageOutputFilter];
//_movieWriter -> groupFilter ->_movieFile
[_movieFile addTarget:groupFilter];
[groupFilter addTarget:_movieWriter];
_movieWriter.shouldPassthroughAudio = YES;
_movieFile.audioEncodingTarget = _movieWriter;
[_movieFile enableSynchronizedEncodingUsingMovieWriter:_movieWriter];
//Start Recording
[_movieWriter startRecording];
//Start Processing
[_movieFile startProcessing];
__weak typeof(self) weekSelf=self;
[_movieWriter setCompletionBlock:^{
__strong typeof(self) stongSelf=weekSelf;
DebugLog(@"Movie Write Completed");
//Finish Recording.
[stongSelf.movieWriter finishRecording];
//Release all object
// [self releaseAllObject];
//remove movieUrl,audioUrl,outputPath
[CSUtils removeChuckFiles:@[movieUrl,audioUrl,outputPath]];
}];
[_movieFile startProcessing];应用程序在iOS 8上崩溃,但在iOS 7上工作正常
@Seasia Creative,我没有足够的声誉来添加该列表的评论,我创建了一个新列表来回答U.我检查输出URL,控制台日志“/var〜~~~ / tmpmerge.mp4”,所以我意识到那个,我想念一个“/”--->“/ var ~~~~ / tmp / merge.mp4”。如果网址不正确,则项目会遇到相同的错误。希望能有所帮助。