Extract thumbnail from video url

Question

I have to extract a thumbnail from a video (from url) and I use this code:

NSString *stringUrl = video.stringurl;
NSURL *url = [NSURL URLWithString:stringUrl         


        

Answer 1

If you are using MPMoviePlayerController then you can use this code to generate thumbnail from video URL.

NSString *stringUrl = video.stringurl;
NSURL *url = [NSURL URLWithString:stringUrl];
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:url];
UIImage *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame];

But, using this code, player will start autoplaying audio. So, you have to stop the player with this code :

//Player autoplays audio on init
[player stop];

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Update :

Error save image Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed"(OSStatus error -12792.)", NSLocalizedFailureReason=An unknown error occurred (-12792)}

The Error is probably due to use of URLWithString. I think you should use -fileURLWithPath instead of URLWithString.

Sample Code :

NSString *stringUrl = video.stringurl;
NSURL *vidURL = [NSURL fileURLWithPath:stringUrl];

AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:vidURL options:nil];
AVAssetImageGenerator *generate = [[AVAssetImageGenerator alloc] initWithAsset:asset];

NSError *err = NULL;
CMTime time = CMTimeMake(1, 60);

CGImageRef imgRef = [generate copyCGImageAtTime:time actualTime:NULL error:&err];
UIImage *thumbnail = [UIImage imageWithCGImage:imgRef];