iOS 获取本地视频的缩略图

相册中视频  获取视频地址和截图

- (void)imagePickerController:(UIImagePickerController *)picker   didFinishPickingMediaWithInfo:(NSDictionary *)info 

{   

    [picker dismissModalViewControllerAnimated:YES];

    

    NSString *mediaType = [infoobjectForKey:UIImagePickerControllerMediaType];

    if([mediaType isEqualToString:@"public.movie"])

    {

        NSURL *videoURL = [infoobjectForKey:UIImagePickerControllerMediaURL];

        NSLog(@"found a video");

        //获取视频的thumbnail     

        MPMoviePlayerController *player = [[[MPMoviePlayerControlleralloc]initWithContentURL:videoURL] autorelease];

        UIImage  *thumbnail = [playerthumbnailImageAtTime:1.0timeOption:MPMovieTimeOptionNearestKeyFrame];

player = nil;

        }

} 

########################

+(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:MPMovieTimeOptionNearest[object Object]KeyFrame];  return img; }