我正在尝试完成一个简单的任务,例如将 UIImage
转换为 NSData
,当我选择一个时返回给我的 AVPlayerItem
来自 PHImageManager
的视频。什么可能等效于 UIImagePNGRepresentation
将视频转换为数据:
PHVideoRequestOptions *videoRequestOptions = [[PHVideoRequestOptions alloc] init];
videoRequestOptions.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;
videoRequestOptions.version = PHVideoRequestOptionsVersionOriginal;
[[PHImageManager defaultManager] requestPlayerItemForVideo:asset options:videoRequestOptions resultHandler:^(AVPlayerItem *item, NSDictionary *info)
{
//?
}];
而 UIImage
是这样的:
[[PHImageManager defaultManager] requestImageForAsset:asset targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeAspectFit options:imageRequestOptions resultHandler:^(UIImage *result, NSDictionary *info)
{
NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(result)]; //<==THIS
}
最佳答案
解决方案是从 AVPlayerItem Assets 获取 URL,然后从该 URL 创建 NSData:
PHAsset *asset = ...
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
[[PHImageManager defaultManager] requestPlayerItemForVideo:asset options:options resultHandler:^(AVPlayerItem * _Nullable playerItem, NSDictionary * _Nullable info) {
NSURL *fileURL = [(AVURLAsset *)playerItem.asset URL];
NSData *videoData = [NSData dataWithContentsOfURL:fileURL];
NSLog(@"tmpData Size: %lu",tmpData.length);
}];
另一种方法是使用“requestAVAssetForVideo:asset”....
PHFetchOptions *fetchOption = [[PHFetchOptions alloc]init];
if ([fetchOption respondsToSelector:@selector(setFetchLimit:)]) {
[fetchOption setFetchLimit:1];
}
PHAsset *asset = [PHAsset fetchAssetsWithLocalIdentifiers:@[@"<Video-localIdentifier>"] options:fetchOption].firstObject;
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc]init];
options.version = PHVideoRequestOptionsVersionOriginal;
options.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;
[[PHImageManager defaultManager] requestAVAssetForVideo:asset
options:options
resultHandler:
^(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info) {
AVURLAsset *urlAsset = (AVURLAsset *)asset;
NSData *videoData = [NSData dataWithContentsOfURL:urlAsset.URL];
if (videoData) {
NSLog(@"videoData Size: %lu", videoData.length);
}
}];
关于ios - 将 AVPlayerItem 转换为 NSData,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37985652/