Spline

This is the demo app that accompanied my AVFoundation talk at the Toronto Area Cocoa & Web Objects Developers Group on May 14, 2013. It showcases capture, composition, a custom player and scrubber interface, synchronized CAAnimations, and real-time VFX. I hope you find it useful. Spline is a funny word.

Requirements

Universal app. iOS 6 only.

RGMRecordingViewController

This is a very simple implementation of the popular video app Vine. Tap the camera button to start a capture session. The gimmick: it only writes samples while your finger is on the screen. Tap the stop button to render the composition to disk.

RGMPlayerViewController

Tap a video to view it in a custom player. This demonstrates use of <AVAsynchronousKeyValueLoading> to load track info, thumbnail generation, transport controls, periodic observation and looping. Hit the "Add Magic" button and drag your finger around the screen to record a CAKeyframeAnimation in synchrony with the current player item. Scrub the timeline to seek through the animation.

RGMGLPlayerViewController

Tap the disclosure buttons (…) to open a GLKView-based player. This uses the new AVPlayerItemVideoDataOutput class to collect and process sample buffers from a video file during playback on the GPU. Use the slider to change the intensity of a CIColorMonochrome filter in real-time!

Additional Resources

• WWDC 2012 Session 517: Real-time media effects and processing during playback
• AVBasicVideoOutput
• AVSimpleEditoriOS
• AVLoupe
• RosyWriter
• Brad Larson -- GPUImage
• Bob McCune -- AVFoundationEditor
• Bill Dudney -- AVCoreImageIntegration

Contact

Ryder Mackay Twitter: @rydermackay ADN: @ryder http://analogkid.ca