ios - 相册选择视频 截取第一针当缩略图

Question

相册选择视频 截取第一针当缩略图,并且上传

Answer 1

This is the method I use to get screenshots:

+(UIImage *)thumbnailOfAVAsset:(AVURLAsset *)asset {
    AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
    generator.appliesPreferredTrackTransform = YES;
    NSError *err = NULL;
    CMTime time = CMTimeMake(0, 2);
    CGImageRef oneRef = [generator copyCGImageAtTime:time actualTime:NULL error:&err];
    UIImage *one = [UIImage imageWithCGImage:oneRef];// [[UIImage alloc] initWithCGImage:oneRef];
    
    return one;
}

This method of obtaining screenshots is best not to be executed in the main thread.

NSURL *url = [NSURL fileURLWithPath:path];//视频地址
AVURLAsset *asset = [AVURLAsset assetWithURL:url];

UIImage *thumbnailImage = [Class thumbnailOfAVAsset:asset];