如何将录制的视频保存到相机胶卷？

Question

我正在尝试使用 iPhone 相机录制视频并在 blog 之后保存到相机胶卷。然而，使用 AVCaptureSession ，相机被初始化。但是当尝试将视频保存到相机胶卷时，会出现 URL 错误。这是我的代码片段

NSString *outputPath = [[NSString alloc] initWithFormat:@"%@%@", NSTemporaryDirectory(), @"myApp.mov"];

            NSURL *outputURL = [NSURL URLWithString:outputPath];
          //  NSLog(@"Output URL  %@ AND ABSOLUTE STRING %@",outputURL,outputURL.absoluteString);
            NSFileManager *fileManager = [NSFileManager defaultManager];
            if ([fileManager fileExistsAtPath:outputPath])
            {
                NSError *error;
                if ([fileManager removeItemAtPath:outputPath error:&error] == NO)
                {
                    //Error - handle if requried
                }
            }
            //Start recording
            [MovieFileOutput startRecordingToOutputFileURL:outputURL recordingDelegate:self];

它给出以下错误

[AVCaptureMovieFileOutput startRecordingToOutputFileURL:recordingDelegate:] - Cannot record to URL /private/var/mobile/Containers/Data/Application/FEA51E75-B2A6-45DD-991B-AFFBF5794EAC/tmp/myApp.mov because it is not a file URL.

但是，如果我将 URL 更改为 initFileURLWithPath，则会出现另一个错误。

Video /private/var/mobile/Containers/Data/Application/B6876493-4354-4607-B348-63C5262AF2D9/tmp/myApp.mov cannot be saved to the saved photos album: Error Domain=NSURLErrorDomain Code=-1100 "The requested URL was not found on this server." UserInfo={NSErrorFailingURLStringKey=file:///private/var/mobile/Containers/Data/Application/B6876493-4354-4607-B348-63C5262AF2D9/tmp/myApp.mov, NSErrorFailingURLKey=file:///private/var/mobile/Containers/Data/Application/B6876493-4354-4607-B348-63C5262AF2D9/tmp/myApp.mov, NSLocalizedDescription=The requested URL was not found on this server., NSUnderlyingError=0x171ad710 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}, NSURL=file:///private/var/mobile/Containers/Data/Application/B6876493-4354-4607-B348-63C5262AF2D9/tmp/myApp.mov}

我真的不明白错误。谁能帮我解决这个问题？

Answer 1

开发者 Apple 网站有一个很好的示例，说明如何处理来自 iPhone 相机的视频、预处理视频并将其保存到相机胶卷。访问 link RosyWriter example 并单击文章顶部的 "download sample" 按钮。

本教程还展示了如何使用 OpenCV 和 OpenGL 库对视频进行预处理。

Answer 2

你有没有这样试过：

   NSString *outputFilePath = [NSTemporaryDirectory() stringByAppendingPathComponent:[@"myApp" stringByAppendingPathExtension:@"mov"]];

参考：与您正在工作的示例相同，

其他

NSString *rootPath = NSTemporaryDirectory();
NSString  *videoPath = [rootPath stringByAppendingPathComponent:@"myApp.mov"];
NSURL *outputURL = [NSURL fileURLWithPath:videoPath];

以上代码在 copyItemAtURL

中对我有用

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