获取视频缩略图

FirstFrameOfVideo.m

 /// 方法一：MPMoviePlayerController
 NSString *videoURL = @"http:// or /private(local video)"
 NSURL *URL = [NSURL URLWithString: videoURL];
 // NSURL *URL = [NSURL fileURLWithPath:videoURL]
 MPMoviePlayerController *iosMPMovie = [[MPMoviePlayerController   alloc]initWithContentURL:URL]; iosMPMovie.shouldAutoplay = NO;
 UIImage *thumbnail = [iosMPMovie thumbnailImageAtTime:time   timeOption:MPMovieTimeOptionNearestKeyFrame];

 /// 方法二：AVAssetImageGenerator

+ (UIImage *)getThumbnailImage:(NSString *)videoURL {
 // 本地视频
 AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL fileURLWithPath:videoURL] options:nil];
 // 网络视频
 // AVURLAsset *asset = [AVURLAsset assetWithURL:[NSURL URLWithString: videoURL]];
 AVAssetImageGenerator *gen = [[AVAssetImageGenerator alloc] initWithAsset:asset];
 
gen.appliesPreferredTrackTransform = YES;
 
 CMTime time = CMTimeMakeWithSeconds(0.0, 600);
 
 NSError *error = nil;
 
 CMTime actualTime;
 
 CGImageRef image = [gen copyCGImageAtTime:time actualTime:&actualTime error:&error];
 
 UIImage *thumb = [[UIImage alloc] initWithCGImage:image];
 
 CGImageRelease(image);
 
 return thumb;
}