On Thursday 27 January 2005 14:45, Jeremiah Morris wrote: > On 27 Jan 2005, at 1:30 PM, Joseph A. Caputo wrote: > > > (1) Is building for non-altivec (i.e., G3) working? At one point I > > thought I was able to build on my G3 iBook by modifying config.h and > > config.mak, but I can't seem to with CVS as of last week. > > I did make a bunch of Altivec changes last Friday, so I may have either > fixed it or broken it unintentionally. Run "./configure > --disable-altivec", and manually change settings.pro to read > "TARGET_ALTIVEC=no" on line 120. If it's still failing, send me the > error log (either on- or off-list) and we can work through it.
Thanks, I'll give it a try. > > I know you > > and Nigel have been working on incorporating all this into qmake, so > > I'll try tonight with your script and latest CVS... > > The script doesn't yet have a non-Altivec option, so you'll have to do > some tweaking if you use that. (Basically you have to get it to change > settings.pro.) For now, if you're already set with the dependencies, it > might be easier to just build it normally, like you have in the past. > I'll try to get this fixed soon. Right; for my purposes that's just fine. > > (2) What is the likelihood that the frontend code will ever be tweaked > > to the point of being able to watch video via the frontend on a G3? > > Not very likely, in my opinion. With mpeg2dec, I can just barely watch > a 640x480 stream on my G4 450, but it still chokes on OSD blending > (which is not Altivec optimized yet). From what I've been reading about > video performance through VLC, MPlayer, etc. it's not just a Myth > problem, it's just CPU-intensive work. > > At this point, you might ask how a G3 can watch video from a DVD. > Apple's DVD player accesses the motion-compensation and IDCT functions > on the video card (the same thing that XvMC does), but there's no > user-level API for this, so Myth can't use the same tricks that Apple > uses. If Apple adds this API in 10.4 or something, it may be possible > to speed things up, but it's equally likely that they wouldn't bother > supporting the video cards from the G3 era. I thought as much, but how about MPEG-4 decoding? Isn't that less CPU-intensive? Has anyone tested performance for non-MPEG2 mythfrontend playback? -JAC _______________________________________________ mythtv-dev mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
