First frame of a video using AVFoundation

Question

I\'m trying to get the first frame of a video using the classes in AVFoundation. But it appears to not be getting an image at all.

My code currently looks like this

Answer 1

Doing this in Swift 4.0:

            // Assumes you have a local `fileURL`

            var avAsset = AVURLAsset(url: fileURL, options: nil)
            var imageGenerator = AVAssetImageGenerator(asset: avAsset)
            imageGenerator.appliesPreferredTrackTransform = true
            var thumbnail: UIImage?

            do {
                thumbnail = try UIImage(cgImage: imageGenerator.copyCGImage(at: CMTime(seconds: 0, preferredTimescale: 1), actualTime: nil))
            } catch let e as NSError {
                print("Error: \(e.localizedDescription)")
            }

Answer 2

I solved it. Apparently using [NSURL fileURLWithPath:videoPath] instead of [NSURL URLWithString:videoPath] makes all the difference.

Answer 3

I used null0pointer solution but in some videos I recieved the first frame rotated. To resolve this issue I set to TRUE the appliesPreferredTrackTransform property of AVAssetImageGenerator. And this code looks like this:

AVURLAsset* asset = [AVURLAsset URLAssetWithURL:fileURL options:nil];
AVAssetImageGenerator* imageGenerator = [AVAssetImageGenerator assetImageGeneratorWithAsset:asset];
[imageGenerator setAppliesPreferredTrackTransform:TRUE];
UIImage* image = [UIImage imageWithCGImage:[imageGenerator copyCGImageAtTime:CMTimeMake(0, 1) actualTime:nil error:nil]];
[self.imageView setImage:image];