GPUImage無法播放錄像機

我正在使用GPUImage庫將視頻錄製到文件系統上的文件。我把它保存爲m4v文件。這是我正在使用的代碼：GPUImage無法播放錄像機

NSString *pathToMovie = [NSHomeDirectory() stringByAppendingPathComponent:recordingDestination]; 
    unlink([pathToMovie UTF8String]); 
    NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie]; 

    movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(1280.0, 720.0)]; 
    [videoCameraFilter addTarget:movieWriter]; 

    movieWriter.shouldPassthroughAudio = YES; 
    movieFile.audioEncodingTarget = movieWriter; 
    [movieFile enableSynchronizedEncodingUsingMovieWriter:movieWriter]; 

    [movieWriter startRecording]; 
    [movieFile startProcessing]; 

    [movieWriter setCompletionBlock:^{ 
     [videoCameraFilter removeTarget:movieWriter]; 
     [movieWriter finishRecording]; 
    }];

這會記錄m4v視頻。然後我嘗試用MPMoviePlayerController發揮它：

NSString *videoPath = [NSString stringWithFormat:@"%@/%@", [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"], [libraryFiles objectAtIndex:selectedCell]]; 
    NSLog(videoPath); 
    NSURL *url=[[NSURL alloc] initWithString:videoPath]; 
    MPMoviePlayerController *moviePlayer=[[MPMoviePlayerController alloc] initWithContentURL:url]; 

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDonePressed) name:MPMoviePlayerDidExitFullscreenNotification object:moviePlayer]; 

    moviePlayer.controlStyle=MPMovieControlStyleDefault; 
    [moviePlayer play]; 
    [self.view addSubview:moviePlayer.view]; 
    [moviePlayer setFullscreen:YES animated:YES];

然而，玩家只要開始緩衝，沒有任何反應。視頻不開始播放。玩家只是永遠緩衝。該應用程序不會崩潰，並且控制檯中沒有警告，所以我不知道是什麼問題。

來源

2013-04-14 Richard Knop

你檢查視頻是否有在保存的目的地是哪裏？下載並在電腦上播放以確保視頻沒有損壞 – Ushan87

我看到了一些看起來不正確的東西。

首先，您直接寫入NSHomeDirectory，它返回的是不可寫入的應用程序目錄（請參閱reference）。請改爲寫入Documents文件夾或Library/Caches文件夾。

其次我不明白videoCameraFilter是如何定義的。您需要確保將其添加爲movieFile

GPUImageMovie *movieFile = [[GPUImageMovie alloc] initWithURL:sampleURL]; 

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *pathToMovie = [documentsDirectory stringByAppendingPathComponent:@"filtered-movie.m4v"]; 
unlink([pathToMovie UTF8String]); 
NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie]; 

GPUImageMovieWriter *movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(1920.0, 1080.0)]; 
GPUImageBoxBlurFilter * videoCameraFilter = [[GPUImageBoxBlurFilter alloc] init]; // just a random filter... 
videoCameraFilter.blurSize = 2.0; 
[movieFile addTarget:videoCameraFilter]; 
[videoCameraFilter addTarget:movieWriter]; 

movieWriter.shouldPassthroughAudio = YES; 
movieFile.audioEncodingTarget = movieWriter; 
[movieFile enableSynchronizedEncodingUsingMovieWriter:movieWriter]; 

[movieWriter startRecording]; 
[movieFile startProcessing]; 

__weak GPUImageMovieWriter *weakMoviewWriter = movieWriter; 
[movieWriter setCompletionBlock:^{ 
    [movieFile removeTarget:weakMoviewWriter]; 
    [weakMoviewWriter finishRecording]; 
}];

目標*編輯：

你嘗試喲做moviePlayer屬性/伊娃作爲@SAMIR RATHOD建議？電影播放器停留在那裏無休止的事實最可能是因爲它沒有被保留而造成的。

屬性添加到您的viewController的接口：

@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;

和實例化MPMoviewPlayerController：

self.moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];

來源

2013-04-22 12:46:19

不，我正在寫文檔目錄。然後，我在錄製後嘗試播放視頻。我知道這個視頻是正確的，因爲如果我只是從相機膠捲上打開它，它就可以工作。 –

看我的編輯.... –

試試這個：

首先檢查將videoPath它顯示正確的路徑或不？

.h文件中

MPMoviePlayerController*  player

.M @synthesize播放器;

-(void) viewWillAppear:(BOOL)animated { 
      [super viewWillAppear:animated]; 

      player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:videoPath]]; 
      player.scalingMode = MPMovieScalingModeFill; 
      player.movieSourceType = MPMovieSourceTypeFile; 
      player.view.frame = CGRectMake(0, 45, 320, 400); 
      player.shouldAutoplay = YES; 
      [player prepareToPlay]; 
      [self.view addSubview:player.view]; 
      [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:player]; 

      [player play]; 
    } 

    #pragma mark MoviPlayer Method 

    - (void) movieFinishedCallback:(NSNotification*) aNotification { 
      MPMoviePlayerController *player1 = [aNotification object]; 
      [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:player1]; 
      [player stop]; 
      [player1.view removeFromSuperview]; 

      player1 = nil; 
      [self.navigationController popViewControllerAnimated:YES]; 
    } 

    -(void) dealloc { 
      [player release]; 
      [super dealloc]; 
    }

來源

2013-04-22 11:35:22

GPUImage無法播放錄像機

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