I'm creating an app using CodenameOne and have to use an ios native
interface to generate some video thumbnails.
I can't see the iOS logs as I don't have a Mac but as far as anyone has
said the iOS code is correct so I feel that it's something to do with
either the passing of file paths from CodenameOne to a native interface or
the returning of NSData into a byte[] in Codename One.
Here is the code I am using in iOS:
-(NSData*)createThumbnailFromMp4:(NSString*)param{
NSURL *mediaURL = [NSURL fileURLWithPath:param];
AVAsset *asset = [AVAsset assetWithURL:mediaURL];
CMTime duration = [asset duration];
CMTime snapshot = CMTimeMake(duration.value / 2, duration.timescale);
AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc]
initWithAsset:asset];
CGImageRef imageRef = [imageGenerator copyCGImageAtTime:snapshot
actualTime:nil error:nil];
UIImage *thumbnail = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
return UIImagePNGRepresentation(thumbnail);}
The param passed in is the full path to the video, but all I get back when
I call this is a 0 length byte[]. Here is the code from CodenameOne:
byte[] thumbnailImage =
tg.createThumbnailFromMp4(FileSystemStorage.getInstance().getAppHomePath() +
movePath);
Where movePath is just the file name of the locally stored video.
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