Question

我正在使用AVCaptureSession为iOS 5.0制作电影应用。我正在为用户提供开始 - 暂停 - 开始 - 停止录制电影的能力

我定义的三个按钮是

开始录制
停止录制
暂停录制

我能够成功启动＆amp;停止录音。我无法做的是暂停录制然后再次恢复。我在堆栈溢出时查看了这个问题/答案，但我不知道他们如何暂停和恢复视频？我确实在这里找到了一些其他帖子，但没有一个我可以用来试用它的示例代码。如果AVAssetWrtier是如何使用它如何与AVCaptureSession一起使用？

ios - Pause video recording

Pause & resume video capture for same file with AVFoundation in iOS

这是我的三个按钮的代码

        -(IBAction) makeMovieNow
        {
            NSLog(@"makeMovieNow ...");

[session startRunning];
            [movieFileOutput startRecordingToOutputFileURL:movieURL recordingDelegate:self];

        }

    -(IBAction) makeMovieStop
    {
        NSLog(@"makeMovieStop ...");

        //stop recording
        [session stopRunning];
    }

    -(IBAction) makeMoviePause
    {
        NSLog(@"makeMoviePause ...");

        //pause video??? How?

    }

//********** DID FINISH RECORDING TO OUTPUT FILE AT URL **********
- (void)captureOutput:(AVCaptureFileOutput *)captureOutput
didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
      fromConnections:(NSArray *)connections
                error:(NSError *)error
{

    NSLog(@"didFinishRecordingToOutputFileAtURL - enter");

    BOOL RecordedSuccessfully = YES;
    if ([error code] != noErr)
    {
        NSLog(@"ERROR RECODING MOVIE!!! - enter");

        // A problem occurred: Find out if the recording was successful.
        id value = [[error userInfo] objectForKey:AVErrorRecordingSuccessfullyFinishedKey];
        if (value)
        {
            RecordedSuccessfully = [value boolValue];
        }
    }
    if (RecordedSuccessfully)
    {
        //----- RECORDED SUCESSFULLY -----
        NSLog(@"didFinishRecordingToOutputFileAtURL - success");

        UISaveVideoAtPathToSavedPhotosAlbum(videoPath2, self, nil, nil);    

    }
}

Answer 1

http://www.gdcl.co.uk/2013/02/20/iPhone-Pause.html上有一个示例iPhone就是这样做的。它使用数据输出而不是电影文件输出，以便将数据传递给应用程序。然后，如果启用了录制，应用程序会将示例传递给AVAssetWriter，暂停/恢复后，会调整时间戳以消除暂停。

Answer 2

我最终创建了两个文件并将它们合并在一起。以下是示例代码和教程

http://www.raywenderlich.com/13418/how-to-play-record-edit-videos-in-ios

AVCaptureSession暂停和恢复录制

2 个答案: