Annotation lines for iphone videos

I am working on an iPhone application where i be creating an video where i can annotate the video with lines . I have gone through the library but could not find anything that could help 开发者_JS百科me till now .

I would really appreciate it if anyone could show some light on this matter at the earliest.

Thanking You,

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If you want to add yourown graphics or text or lines to the video have a look at AVFoundation, should be able to do what you wAnt