[x264-devel] Re: Another CPU related question

[Loren Merritt]

On Wed, 3 May 2006, Jelle wrote:
> Loren Merritt wrote:
>> On Wed, 3 May 2006, Pedro Tumusok wrote:
>> 
>>> There has been some articles about it being able to decode 48 mpeg2 
>>> streams at once or something like that, so then to my question, do you 
>>> belive it would be able to show similar kind of performance in encoding?
>> 
>> 48 mpeg2 streams? You don't need a Cell for that, unless they're 1080p or 
>> something. A dvd takes 2% cpu on my Athlon64 3400, so the only thing 
>> preventing me from displaying 48 of them is bandwidth to the harddrive and 
>> video card.
>
> That 2% is achieved by offloading a lot of the work to the videocard (which 
> does the idct and the mc). Unless you have 48 video cards in your system, it 
> will not be able to decode 48 mpeg streams.

No, I don't know whether my videocard supports xvmc, but I certainly 
haven't enabled it in ffmpeg. This is cpu-time as measured by
`time mplayer -benchmark -vo null -nosound -vc ffmpeg2`.

--Loren Merritt

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