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Version: 11.8.0

How to programmatically detect video track qualities on iOS

This article describes how you can use the VideoTrack API, a sub-API of the MediaTrack API, to detect video track qualities. Implementing this functionality is a common use-case for developers who want to build their own UI to visualize the available video track qualities.

Usage​

The qualities of a video track are available as soon as the track is added to player.videoTracks.

player.videoTracks.addEventListener(type: VideoTrackListEventTypes.ADD_TRACK, listener: { addTrackEvent in
    guard let videoTrack = addTrackEvent.track as? VideoTrack else { return }
    for i in 0..<videoTrack.qualities.count {
        let quality = videoTrack.qualities[i]
        var msg = "Quality added: bandwidth = \(quality.bandwidth)"
        if let videoQuality = quality as? VideoQuality {
            msg.append(", width = \(videoQuality.width), height = \(videoQuality.height)")
        }
        print(msg)
    }
})