iOS 获取本地视频的缩略图

需要添加AVFoundation和CoreMedia.framework

 +(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;


}

这个方法也可以

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;
}