首先大家先添加AVFoundation和CoreMedia.framework兩個框架

• 第一種本地視頻獲取縮略圖

NSString *path = @"www.51ios.net/本地路徑"
MPMoviePlayerController *51iosMPMovie = [[MPMoviePlayerController alloc]
initWithContentURL:[NSURL fileURLWithPath:path]];
 UIImage *img = [51iosMPMovie thumbnailImageAtTime:0.0
timeOption:MPMovieTimeOptionNearestKeyFrame];
 
此處的img就是時間在0.0的縮略圖

• 第二種獲取網絡視頻的縮略圖

NSString *videoURL = @"http://www.51ios.net/archives/784"
 
MPMoviePlayerController *51iosMPMovie = [[MPMoviePlayerController alloc]initWithContentURL:videoURL]; 51iosMPMovie.shouldAutoplay = NO;
UIImage *thumbnail = [51iosMPMovie thumbnailImageAtTime:time timeOption:MPMovieTimeOptionNearestKeyFrame];
 
此處的thumbnail就是網絡視頻的縮略圖

• 第三站方法用AVFoundation實現

+(UIImage *)getThumbnailImage:(NSString *)videoURL
 
{
 
 AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL fileURLWithPath:videoURL] options:nil];
 
 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;
}

注：文章轉載自博客