Playing and decoding/encoding/saving/timeshifting are different things =)
On Fri, 25 Feb 2005 14:53:29 -0800, Brad Templeton <[EMAIL PROTECTED]> wrote: > On Fri, Feb 25, 2005 at 05:14:11PM -0500, john roberts wrote: > > > > Has anyone gotten the Mini-mac to work as a frontend with ATSC content? > > > > I was reading the threads from last month and there was some question as to > > the CPU having enough to do smooth playback. > > > > Anyone? > > I was speaking with the elgato folks who were demoing their eyetv HDTV PVR > at our reception on Tuesday. > > The "HD" they demo was 960x540p -- ie. 1/4 resolution, effectively. > > They generally feel you need a dual G5 to decode full 1080i. A single > won't do it. No way for an imac mini -- unless some day Apple releases > APIs to control the mpeg decoder inside it. But they have not been > forthcoming. > > An the other hand, it was interesting that they were able to write > a special codec that could play 1080i at 960x540p resolution with the > limited CPU available. It means if somebody wanted to be a busy beaver > they might also be able to write such a codec for linux that could let > people play HDTV files, at this lower res (just fine for EDTVs) on lower > powered CPUs without need for pre-transcode. > > The codec of course has to decode the full stream. They said the main > thing was simply not having to deal with the memory bandwidth required for > full HDTV (which is about 500mb/second for 1080p30fps which is what > you usually get out of a deinterlacer) that made enough of a difference. > > In theory a clever dec (2nd half half of codec) could save a bit of time > knowing it was downscaling to 1/4 as well, but as far as I know nobody > has written one. It was interesting to see this working at least partway > (at least for those interested in receiving HD and playing it on SDTVs > with cheaper CPUs) > > > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > > >
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