在视频播放中经常会用到截取第一帧图片来当做默认背景图的功能, 下面是代码
#pragma mark ---- 获取图片第一帧
- (UIImage *)firstFrameWithVideoURL:(NSURL *)url size:(CGSize)size
{
// 获取视频第一帧
NSDictionary *opts = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO] forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:url options:opts];
AVAssetImageGenerator *generator = [AVAssetImageGenerator assetImageGeneratorWithAsset:urlAsset];
generator.appliesPreferredTrackTransform = YES;
generator.maximumSize = CGSizeMake(size.width, size.height);
NSError *error = nil;
CGImageRef img = [generator copyCGImageAtTime:CMTimeMake(0, 10) actualTime:NULL error:&error];
{
return [UIImage imageWithCGImage:img];
}
return nil;
}
注: CGImageRef 创建的对象需release
