Objective-c，有沒有什麼辦法從URL取代視頻縮略圖，而不是使用MPMoviePlayerController和AVAssetImageGenerator？

Question

我想從URL中獲取視頻縮略圖，而不是使用MPMoviePlayerController和AVAssetImageGenerator。因爲這些有一些問題。問題我已經問，

1個是：AVAssetImageGenerator not working properly, I am unable to fetch thumbnail of video from URL

和第二點是：https://stackoverflow.com/questions/32431311/mpmovieplayercontroller-not-fetching-thumbnail-of-video-from-url-properly

我不知道該怎麼做。任何建議都會很棒。預先感謝 ！！！

Answer 1

試試這個。

AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL URLWithString:@"[video URL]"] options:nil]; 
AVAssetImageGenerator *generateImg = [[AVAssetImageGenerator alloc] initWithAsset:asset]; 
NSError *error = NULL; 
CMTime time = CMTimeMake(1, 65); 
CGImageRef refImg = [generateImg copyCGImageAtTime:time actualTime:NULL error:&error]; 
NSLog(@"error==%@, Refimage==%@", error, refImg); 

UIImage *FrameImage= [[UIImage alloc] initWithCGImage:refImg]; 

Answer 2

所有你需要的是把你的網址下方self.imageView.image = FrameImage;

評論反正。

NSString *str=@"https://scontent.cdninstagram.com/hphotos-xfa1/t50.2886-16/11719145_918467924880620_816495633_n.mp4"; 
NSURL *url=[[NSURL alloc]initWithString:str]; 

AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:url options:nil]; 
AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset]; 
    generator.appliesPreferredTrackTransform=TRUE; 
NSError *error = NULL; 
CMTime thumbTime = CMTimeMakeWithSeconds(0,30); 

CGImageRef refImg = [generator copyCGImageAtTime:thumbTime actualTime:NULL error:&error]; 
if(error) { 
    NSLog(@"%@", [error localizedDescription]); 
} 
UIImage *FrameImage= [[UIImage alloc] initWithCGImage:refImg]; 
[self.imageView setImage:FrameImage];