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

[Steve Hodge]

On Mon, Feb 23, 2009 at 10:44 PM, Jean-Yves Avenard <jyavenard at gmail.com>wrote:

> 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>
> 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.
>

Good point, I forgot that h264 was part of mpeg4.

Cheers,
Steve
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