Ok. I think half the problem here is we get a Vsync interrupt per field but no indication of whether it's the odd or even field. I discovered by accident i can get this from the 7127 by reading it's registers so i'll look at that and try and ensure we only do things on a frame vsync rather than on odd field one. In the end i think we can do a field by field interface which cuts down the dma by half per field but that will be later.
John --- [EMAIL PROTECTED] wrote: > xv. Haven't used the decoder for a week or so. > > FWIW, I think using the decoder is almost dead, > unless > you have a really slow system that can't cpu-decode > mpeg2 (mine is 2.4GHz P4). It is much nicer to have > xv-based video. Seeking is smoother, you can use > transcoding in Myth, you can play practically all > other types of videos including dvds without effort, > and things like adjusting the playback speed (like > 0.5x-1.5x) work right. The 350 video output is good > quality, but I think for most people the actual > decoder is not worth the effort. > > > --- John Harvey <[EMAIL PROTECTED]> > wrote: > > > Are you using the 350 mpeg decoder for livetv or > > playing it with the Xv code in myth? > > > > John > > --- [EMAIL PROTECTED] wrote: > > > > > I just noticed that, regarding comment #1, the > > > entire > > > video region seems to be displaced upward a > litle > > > bit, > > > clipping a little at the top. The information > box > > > on > > > the OSD is just slightly getting clipped by the > > top > > > of > > > the TV. > > > > > > --- [EMAIL PROTECTED] wrote: > > > > > > > OK here's my experience. It's similar to > > Lucas's > > > > experience. > > > > > > > > Let me say first, I'm in NTSC-land. And > overall > > > it > > > > looks very nice. Thank you Ian and John for > > your > > > > great work. > > > > > > > > 1) First thing I notice is the black bar on > the > > > > bottom. On my TV it's about 6-7% of the > > vertical > > > > distance of the screen, across the width of > the > > > > screen. > > > > 2) Live TV video is a little blurry. Close > > > > inspection > > > > while paused, or while looking at the OSD > shows > > > that > > > > there is some problems with the scanlinens > (i.e. > > > odd > > > > vs. even). Each frame is made up of two > > > ghost-lets, > > > > vertically displaced by about 2 or so scan > lines > > > > from > > > > each other. It's as if the odd scan line > > > > information > > > > is being fed to the even rasters, and vice > > versa. > > > > It > > > > also has the effect of making some of > on-screen > > > > fonts > > > > look like they are underlined. I don't see > this > > > in > > > > framebuffer graphics like the MythTV menus. > > It's > > > > particularly obvious with the OSD graphics. > > > > 3) The first time I started live TV, the OSD > was > > > > displaced to the right of where it's supposed > to > > > be. > > > > > > > > OSD elements were running off to the right of > > the > > > > screen. However, I exited, played something > in > > > > xine, > > > > and went back to live TV and now the OSD > > elements > > > > are > > > > properly centered. Interesting. > > > > 4) video in xine is shifted to the left by > ~10% > > of > > > > the > > > > screen width, including the OSD elements, > > > resulting > > > > in > > > > a black bar along the right side of the > screen. > > > > Video > > > > aspect ratios do indeed change correctly > (yay!), > > > > though with a horizontal offset. xine is also > > > > showing > > > > the vertical scanline stuff mentioned in #2, > > > causing > > > > somem blurring. > > > > 5) I don't see any tearing (stairing?) > anymore. > > > It > > > > may just be in my mind, but the video looks > > quite > > > a > > > > bit smoother. Scratch that. I just saw a > > > > commercial > > > > that had a lot of flashing in it (black to > > white), > > > > and > > > > half way down the screen you could see where > > the > > > > frames weren't each fully drawn. It's harder > to > > > see > > > > in regular video though. > > > > 6) Again, it may just be in my mind, but when > > > there > > > > is > > > > a lot of action on the screen, there's a > > > ghost-like > > > > effect where it looks like consecutive frames > > are > > > > being mixed or blended. Like previous frames > > > > "linger" > > > > as new frames are drawn. It could be in my > > mind, > > > > though. > > > > 7) Starting live TV and channel changing seems > > to > > > be > > > > occuring a few seconds faster. Definitely a > > > > noticeable improvement. > > > > 8) After messing around with it for ~30 > minutes, > > > > including some rewinding and fastforwarding, > no > > > > crashes yet. > > > > 9) When I start live TV it claims that it is > > only > > > 1s > > > > behind in the framebuffer. It used to be I'd > > > > generally get about 4s. If I skip backward > and > > > > forward, it becomes 3s, pretty solid. > > > > 10) Xorg is showing about 12% CPU usage during > > > video > > > > playback. > > > > > > > > > > > > Relevant portion of /var/log/messages is > > attached. > > > > > > > > > > > > > > > > --- John Harvey <[EMAIL PROTECTED]> > > > > wrote: > > > > > > > > > I'm looking at issues with mythtv now. My > > issues > > > > are > > > > > even worse than this so > > > > > I'll try to understand what is happening. > > > > > John > > > > > > > > > > > -----Original Message----- > > > > > > From: > [EMAIL PROTECTED] > > > > > [mailto:ivtv-devel- > > > > > > [EMAIL PROTECTED] On Behalf Of > > > Lucas > > > > > Meijer > > > > > > Sent: 26 June 2005 11:29 > > > > > > To: [email protected] > > > > > > Subject: Re: [ivtv-devel] [PATCH] YUV > > scaling > > > > > improvements > > > > > > > > > > > > John Harvey wrote: > > > > > > > The attached patch is mostly the work of > > Ian > > > > > Armstrong and improves the > > > > > > > set up of the registers when playing > back > === message truncated === ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! 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