iOS 获取本地视频的缩略图

+(UIImage *)getImage:(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;

}

需要添加AVFoundation和CoreMedia.framework

另外一种那个方法

MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc]initWithContentURL:videoURL]; moviePlayer.shouldAutoplay = NO; 

UIImage *thumbnail = [moviePlayer thumbnailImageAtTime:time timeOption:MPMovieTimeOptionNearestKeyFrame];

//这个也一样

+(UIImage *)fFirstVideoFrame:(NSString *)path 
{ 
    MPMoviePlayerController *mp = [[MPMoviePlayerController alloc] 
                                   initWithContentURL:[NSURL fileURLWithPath:path]]; 
    UIImage *img = [mp thumbnailImageAtTime:0.0 
                                 timeOption:MPMovieTimeOptionNearestKeyFrame]; 
    [mp stop]; 
    [mp release]; 
    return img; 
}

转：http://blog.sina.com.cn/s/blog_6d01cce301019xym.html