[mythtv] Critical Win32 patch

Andrei Tanas andrei at tanas.ca
Mon Feb 18 20:05:16 UTC 2008

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On Mon, 18 Feb 2008 13:46:26 -0600, "Robert Johnston" <anaerin at gmail.com>
> On Feb 18, 2008 1:34 PM, Kevin Kuphal <kkuphal at gmail.com> wrote:
>> Stable or usable?  I'm very curious once the playback gets implemented

Stable and usable.

> what
>> happens on a Windows frontend if you have the nVidia PureVideo (read:
> $$)
>> drivers installed.  If that ends up providing maximum acceleration from
>> video card hardware, that could be very interesting indeed.
> As the nVidia PureVideo drivers use DirectShow Codecs/Filters to know
> what/where/when to accelerate, and Myth isn't using DShow, Myth would
> see no benefit whatsoever from PureVideo (Or AVIVO for you ATI fans
> out there).

> I believe it would take a major architecture change (Which would also
> break Myth on every other platform) to implement DShow in
> MythFrontend.

I don't believe it would either require a major architecture change to use
DShow decoders and video rendering, but it is a major task.

Currently CPU usage is about at the same level as Linux version with
xv-blit renderer, NTSC content (720x480, 6MBps) causes less than 10% CPU
utilization 720p playback uses 70% of a single core of my Core2 Duo.

Several things are still missing: I have not tried to figure out whether
it's possible to access the same video folders that Linux frontends use
after "storage groups" have been implemented.

Some features definitely don't work: DVD playback (although DVD ISO images
play perfectly), CDDA in mythmusic, multichannel audio (though it should be
fairly easy to implement), to name some.

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