hello
when i snap the framebuffer using [pix_snap], i get a cpu usage of over 80% @ 20fps with dimension 320x240. is that what one would expect? the same, but using [pix_snap2tex] doesn't cause any cpu peak at all. of course, i'll use [pix_snap2tex] whenever possible, but i'd like to record opengl-stuff into a video file. or is there another/more optimized method to record gem's output into a videofile?
roman
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pix_snap takes up CPU time waiting for the GPU to finish all rendering operations and then bring the data from the card to main memory. This is one of the least efficient OpenGL operations. 80% CPU at such a small size seems like a lot though.
On 5/8/07, Roman Haefeli reduzierer@yahoo.de wrote:
hello
when i snap the framebuffer using [pix_snap], i get a cpu usage of over 80% @ 20fps with dimension 320x240. is that what one would expect? the same, but using [pix_snap2tex] doesn't cause any cpu peak at all. of course, i'll use [pix_snap2tex] whenever possible, but i'd like to record opengl-stuff into a video file. or is there another/more optimized method to record gem's output into a videofile?
roman
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Roman Haefeli