From: Billy B. <ve...@du...> - 2002-08-23 19:38:57
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gta...@pi... (gta...@pi...): > I've read everything I can find, in the Marvel project's docs, in > Matrox's XFree86 driver docs, and in mplayer and the kernel, and what > few documents say anything say that TV output on the g450etv isn't > supported. > > Is this true? Does it even slightly work in any way at all, or is it > just radically different from the g[24]00 cards? Is anybody actively > working on the g450? Are the necessary docs published? (I see that > there are some 200/400 docs from Matrox and Samsung, but the README > doesn't mention the 450 at all). The TV output chip (aka maven, the matrox video encoder) is found on the G200, G400, and I _think_ on the G450. While there is very little information about TV output under linux, all sources seem to indicate that nobody has reliably got the maven code to work on the G450/G550. That said, it doesn't work very well on the G200 or G400s either. While the G400 and G200 specs are easily findable with some google'ing, the maven docs were never released to anyone in the Linux scene, and have been reverse engineered. Not very well though: getting an RGB framebuffer on your TV works, but it's crap, and you can't get a Y'CbCr framebuffer or an interlaced framebuffer. It also completely sucks for quality, and there is very little information about NTSC modelines for it. Compare this to windows: using DirectShow you can convince the 'DVDMax' feature to give you an interlaced framebuffer, but you can't get the VBI interrupt needed to actually get interlaced content to display properly. While we could get that interrupt and use it in linux, we're screwed because we can't talk to the chip. Result? high quality TV output is not available on either platform, but it's one hell of alot better for video under Windows, and more reliable. Sorry, I don't know anything about the eTV's capture stuff, except that I've heard alot of reports that it's slow slow slow: full resolution interlaced recording at 720x486 eats up too much resources to be practical. I have not confirmed this myself: I only have a G400. -- Billy Biggs ve...@du... |