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, ) == 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]; }