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Effective way to update texture in OpenGL

I wanted to make some video streams using OpenGL. I am currently using the glTexImage2D provided by JOGL and rendering in a Swing window. To update the texture contents for each video clip, I call glTexImage2D. I want to know if there is a faster way to update the texture without calling glTexImage2D for each frame.

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You will always use it glTexImage2D, but with the difference that the data comes from the buffer object ( what is this? ), And not from the pointer.

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