[Asterisk-Users] faster transcoding possible

[Andrew Kohlsmith]

On Wednesday 02 November 2005 14:11, trixter aka Bret McDanel wrote:
> According to http://www.extremetech.com/article2/0,1697,1880749,00.asp
> ATI is delivering a GPU enabled transcoding method that cuts video
> transcoding down to 1/5 the time it would take the cpu.  This might also
> be applied to audio codecs in theory (I havent looked into it enough).

This has come up several times over the years.  YES a GPU might be able to 
take some CPU load off but you now add latency because you're shipping data 
to and from main memory to the GPU and back.   It's also been stated that AGP 
transfers are optimized for memory to the video card and not the other way 
around, so you may add more latency than you expect.

Using the GPU for video codec work makes sense because once it's off on the 
video card it ain't coming back.  This is most certainly not the case with 
audio.  :-)

Nobody can really truly say until there are some benchmarks run, and nobody's 
stopping anyone from exerting the effort.  It just takes someone curious 
enough to acutally go do it.

-A.