Question

我正在尝试创建一个可以将视频录制到文件中的应用。我使用此文档文件作为指南：Apple documentation。当视频持续时间达到其允许的最大持续时间时，会出现此问题。这是我设置最长持续时间的方式：

    self.avOutput = [[AVCaptureMovieFileOutput alloc] init];
    self.avOutput.maxRecordedDuration = CMTimeMake(5 * 20, 20);

然后调用此方法并开始出现问题：

- (void)captureOutput:(AVCaptureFileOutput *)captureOutput
    didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
    fromConnections:(NSArray *)connections
    error:(NSError *)error 
{
    BOOL recordedSuccessfully = YES;
    if ([error code] != noErr) {
        // A problem occurred: Find out if the recording was successful.
        id value = [[error userInfo] objectForKey:AVErrorRecordingSuccessfullyFinishedKey];
        if (value) {
            recordedSuccessfully = [value boolValue];
        }
    }

    // some code...

}

因此，此方法调用：[[error userInfo] objectForKey:AVErrorRecordingSuccessfullyFinishedKey]返回nil作为结果，我无法检查录制是否定期完成。

这很奇怪，因为我没有找到涵盖这个特定案例的文档的任何部分。这是打印错误日志时得到的结果：

(lldb) po error
Error Domain=AVFoundationErrorDomain Code=-11810 "Recording Stopped" UserInfo=0x146443c0 {AVErrorTimeKey=CMTime: {100/20 = 5.000}, NSLocalizedFailureReason=The recording reached the maximum allowable length., NSLocalizedDescription=Recording Stopped, NSUnderlyingError=0x1463edb0 "The operation couldn’t be completed. (OSStatus error -16132.)"}

(lldb) po error.userInfo
{
    AVErrorTimeKey = "CMTime: {100/20 = 5.000}";
    NSLocalizedDescription = "Recording Stopped";
    NSLocalizedFailureReason = "The recording reached the maximum allowable length.";
    NSUnderlyingError = "Error Domain=NSOSStatusErrorDomain Code=-16132 \"The operation couldn\U2019t be completed. (OSStatus error -16132.)\"";
}

有人可以帮我解决这个问题吗？

谢谢！

Answer 1

嘿，我不确定您是否找到了解决此问题的方法，但我通过检查录制视频的大小来解决此问题，使用

    @property(nonatomic, strong) NSData *getVideo;

如下：

    //At the end of the method above add:

    getVideo = [NSData dataWithContentsOfURL:outputFileURL];
    NSLog(@" size of getVideo %lu in bytes", (unsigned long)getVideo.length);

这将检查录制视频的大小。我希望这可以帮到你。你有没有找到更好的方法来解决这个问题？谢谢！

maxRecordedDuration过期后无法检查录制是否成功

1 个答案: