GPUImage work with other OpenGL Context failed

Question

In my projiect , I get a opaque filter framework which based on GPUImage. I wanna create an app can have a video call just like FaceTime,so I use this filter framework provided OpenGL ViewA to render camera image,Using my own openGL viewB to render remote video stream. now I get a problem .the viewA was irregularly show the viewB's content. particularly when the viewA's frame changed. like this: the remote Video pixel format is I420 and the local video pixel format is NV12. so technically the viewA must can't render viewB 's content. Like you can see:the viewA show the gray image of viewB. I assume viewA get the the Y planar data of viewB somehow. when viewA show gray image,it's frame rate slow down greatly. because the viewA belong to a opaque framework,I can only control own OpenGL rendering part viewB.I don't know how to resolve this bug. It most likely the two EAGLContext is conflict,or viewA and viewB shared the render/texture buffer somehow? Anyone,please help me.I am struggling this several days.

Answer 1

It's turn out that the OpenGL context confused management lead to this problem.