Get number of frames in a video via AVFoundation

Question

I'm trying to find the number of frames in a video I've just opened, without decoding all the frames.

I open with AVAsset and then get an AVAssetTrack for the video. What next ?

Answer 1

You could do this:

float durationInSeconds = CMTimeGetSeconds(asset.duration);
float framesPerSecond = assetTrack.nominalFrameRate;
float numberOfFrames = durationInSeconds * framesPerSecond;