Re: Re: Xvideo extension artifacts

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> bttv 0.8.x tries to do zerocopy reads, i.e. you can pass the shm segment
> pointer to read() syscall.
>
>   Gerd

So would it perhaps be faster to get your shared memory segments from X, and 
the do reads and display that memory?  I have driver version num..0.8.31.  

Is there a way to know if the memory segment is dma-able?  

On my nvideo card, I can use the v4l2 YUV420 pixel format along with the NV10 
overlay port with format 0x30323449, fourcc code I420.  No colorspace 
conversion necessary.  

It is pretty sweet, only uses <10% processor as reported by top.  

Chris





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