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获取视频的第一帧图片
有时候我们拍摄完视频后，希望获取一张图片当作这个视频的介绍，这个图片thumbnailImage可以从视频的第一帧获取到。
我们的思路是先获取视频的URL，然后初始化一个MPMoviePlayerController做工具，利用MPMoviePlayerController来拿图片，看具体代码如下：
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType]; if (CFStringCompare ((__bridge CFStringRef) mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo) { NSURL *videoUrl=(NSURL*)[info objectForKey:UIImagePickerControllerMediaURL]; NSString *moviePath = [videoUrl path]; 这里利用MPMoviePlayerController来获取 MPMoviePlayerController *player = [[MPMoviePlayerController alloc]initWithContentURL:videoUrl] ; UIImage *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame]; imageV.image = thumbnail; player = nil;//释放player NSString *videoCacheDir = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches/UploadPhoto/"]; if (![[NSFileManager defaultManager] fileExistsAtPath:videoCacheDir]) { [[NSFileManager defaultManager] createDirectoryAtPath:videoCacheDir withIntermediateDirectories:YES attributes:nil error:nil]; } } [self dismissViewControllerAnimated:YES completion:nil]; }
第五十二篇、 OC获取视频的第一帧图片thumbnailImage
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原文地址：http://www.cnblogs.com/HJQ2016/p/5962799.html
