i want to set every frame from camera of phone as texture and map it to camera's screen. The size of frame i got is 264*198, so i change it to 256*128. And then i convert this image to RGBA in order to use glTexImage or glTexSubImage function. But the real time performance are more or less. One is 6.7fps by using glTexImage and another is 6.8fps by using glTexSubImage. The phone i use is Nokia 6120c with 13 fps by camera. Rendering full screen costs almost half of system time. It is so slow. Is there any faster solution?
Looking for fast replying.

Thank you.