有没有办法使用MPMoviePlayerController以双倍速度播放视频?
myMPMoviePlayerController.currentPlaybackRate = 2.f
不会改变任何事情。
答案 0 :(得分:12)
先播放电影,然后设置播放速率。
答案 1 :(得分:4)
您必须使用setCurrentPlaybackRate方法,如下所示:
[myMPMoviePlayerController setCurrentPlaybackRate:2.f];
答案 2 :(得分:0)
现在即使它有点老问题,但如果有人遇到同样问题,我想分享一下。
以下是我正在使用的代码示例以及与我合作
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
[self dismissViewControllerAnimated:YES completion:^{
if (CFStringCompare ((__bridge_retained CFStringRef)mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo) {
MPMoviePlayerViewController *theMovie = [[MPMoviePlayerViewController alloc]
initWithContentURL:[info objectForKey:UIImagePickerControllerMediaURL]];
[theMovie.moviePlayer play];
theMovie.moviePlayer.currentPlaybackRate = 2.00f;//here we can set speed
theMovie.moviePlayer.fullscreen = YES;
[self presentMoviePlayerViewControllerAnimated:theMovie];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(myMovieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification object:theMovie];
}
}];
}
希望这会对某人有所帮助。