Pixel formats, CVPixelBufferRefs and glReadPixels

Question

I\'m using glReadPixels to read data into a CVPixelBufferRef. I use the CVPixelBufferRef as the input into an AVAssetWriter

Answer 1

glReadPixels(0, 0, w*s, h*s, GL_BGRA, GL_UNSIGNED_BYTE, buffer);

Use GL_BGRA in glReadPixels. It works, just tried it myself.