MPMoviePlayerController无法播放新保存的视频文件 [英] MPMoviePlayerController doesn't play newly saved video file

问题描述

我正在使用imagePickerController录制视频.在imagePickerController:didFinishPickingMediaWithInfo:函数中，我试图将视频设置为先前定义的MPMoviePlayerController:

I'm using an imagePickerController to record video. In the imagePickerController:didFinishPickingMediaWithInfo: function I'm trying to set the video to a previously defined MPMoviePlayerController:

if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]){
    NSURL *movieUrl = [info objectForKey:UIImagePickerControllerMediaURL];
    [self.moviePlayer setContentURL:movieUrl]];
}

这工作正常，并且确实在播放视频. 但是我想保存文件以备后用.当我这样做并将保存的文件用于moviePlayer时，什么也没发生:

This is working fine and the video is indeed playing. But I want to save the file for later use. When I do this and use the saved file for the moviePlayer, nothing happens:

• 我已经尝试过(将数据保存到新文件中)

• I've tried this (saving the data to a new file)

NSString *directory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *newPath = [directory stringByAppendingPathComponent:@"myMovie.mov"];
NSData *videoData = [NSData dataWithContentsOfURL:movieUrl];
[videoData writeToFile:newPath atomically:NO];
[self.moviePlayer setContentURL:[NSURL URLWithString:newPath]];

或此操作(将临时视频文件复制到我的文档文件夹中)

or this (copying the temp video file to my document folder)

NSString *directory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *newPath = [directory stringByAppendingPathComponent:@"myMovie.mov"];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error = nil;
[fileManager copyItemAtPath:[videoUrl path] toPath:newPath error:&error];
[self.moviePlayer setContentURL:[NSURL URLWithString:newPath]];

即使newPath上的文件确实存在，也没有成功...我在做什么错了?

Without any success, even though the file at newPath does exist... What am I doing wrong?

推荐答案

好，我终于找到了问题.问题实际上并非与MPMoviePlayerController有关，而与以下内容有关:

Ok I finally found the issue. The problem was not in fact with the MPMoviePlayerController but with the line:

[self.moviePlayer setContentURL:[NSURL URLWithString:newPath]];

我通过将行替换为:

[self.moviePlayer setContentURL:[NSURL fileURLWithPath:newPath isDirectory:NO]];

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