ios - How to "render" a Box2D scene on iPhone -

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i'm using box2d cocos2d on iphone. have quite complex scene set up, , want end user able record video part of app. have implemented recorder using avassetwriter etc. , have managed recording frames grabbed opengl pixel data.

however, video recording seems a) slow down app bit, more importantly b) record few frames per second @ best.

this led me idea of rendering box2d scene, manually firing ticks , grabbing image every tick. however, dt issue here.

just wondering if has done this, or if has better ideas?

a solution guess use screen recorder solution screenflow or similar...


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