[mythtvnz] Best way to reduce CPU use (by ~10%) during software encoding/decoding

[Jean-Yves Avenard]

Hi


On 23/02/2009, at 8:35 PM, Steve Hodge <stevehodge at gmail.com> wrote:

> On Mon, Feb 23, 2009 at 9:05 PM, Aaron Whitehouse <lists at whitehouse.org.nz 
> > wrote:
> Thank you to Steve for the resolution suggestion - that seems to have
> cut the CPU usage by enough without destroying the quality.
>
> It worked for me so I figured it was worth a go. I read somewhere  
> that the horizontal resolution of SD signals is actually very low -  
> much lower than the 720x576 (or 704x576) that is theoretically  
> possible.
>
>  I am still
> quite disappointed by how much CPU decoding MPEG-2 takes - it is
> significantly more than MPEG-4, which is a much more compressed  
> format.
>
> The mpeg standards are designed with decoding requirements in mind -  
> so mpeg4 requires a lot more horsepower to encode and yet is just as  
> easy to decode (or even easier as you are seeing in your case).
>

Mpeg4 easy to decode?
H264 is part of mpeg4, could very easily argue that it's all but easy  
to decode.

Mpeg2 is the easiest format to decode, so that it requires more power  
than mpeg4 to get it to playback properly doesn't make much sense.

Jean-Yves
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