Quad video output problem @ 640x480

When I connect my new Quad to a TV with the DVI to Video adapter there are some glitchy looking artifacts at the very top of the display. Some pixels of random colors but most of them are just black. This only affects the top 30 pixels or so and only on the TV (not on my main screen). The problem only exists when displaying at 640x480 and with overscan on. The problem persists whether using s-vid or composite cable. I have the stock graphics card, the nVideo 6600. I'll post a picture of the glitch to this thread when I can get my hands on a digital camera.
-=turner

Good morning from Croatia..
I have same problem: lines going horizontaly from down to up..same video card...maybe flash bios would help but i'm not shure..still have that problem..

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Acer 1810tz video output problems intel 4500mhd

I cannot get video output on my acer 1810tz via both hdmi and vga - no signal as far as I can tell. According to this ubuntu wiki article there are no known problem with video out:
https://help.ubuntu.com/community/Aspir … with%20VGA
and I have installed the display package as suggested by this wiki article:
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lspci
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I have only used the normal display and hdmi until now, worked without a problem. Xorg with no config.
$ xrandr --output HDMI1 --auto
xrandr output with no device connected.
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Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm
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640x480 59.9
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
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Mac mini video output problems

My mini is one bunch of problems, here is what im dealing with,
On my screen i have 2 systems connected, when i switched bac from my windows pc to my mini, my screen says no signal. I can press the keyboard etc, nothing happens. Same as when the mini goes into sleep mode. It wont wake up . Si i have to reset the mini all the time. What is causing this and how could i solve it. The mini is connected with hdmi.

Hi, JO5B.
I have Dell Monitor that has 3 computers plugged into different inputs.
When switching between different machines I have to select the new input from the monitor's on screen menu. The Dell doesn't auto detect the new input and switch itself over.
Try a manual selection from the OSD, that might solve your problem.
Regards,
Scorpii

Video output problems version 9

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or
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IMac G5 iSight - Resolution problems when using s-video output.

Good afternoon all.
I have an iMac G5 and the only video output it has is a mini VGA socket. I have used this with a mini VGA to S-Video converter cable from Apple and am getting some odd results.
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Thank you again in advance.
Stuart

Hi
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Hello to all: My iMac has developed a video display problem. It displays everything in cartoon like colors - purple, green, blue. Can this be repaired? Is there a way to output to a different monitor? Thanks in advance! isplays

Hello -
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Go to System Preferences > Universal Access > Seeing.
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You can also reset it by pressing Command-Option-Control-8

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Luca,
Please refer to the included documentation. Color does not and will not send external video through firewire to any device, save one, and that is the Aja IO HD and then that device is limited to standard definition video only.
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Video playback problems [6500 Slide]

Video playback at 25, 29.9, 30 fps is jerky, only 12.5, 15 fps videos play correctly... Lowering the bitrate or using a less complex profile/codec doesnt help much. Funny thing is, it can play its own videos which are whooping 640x480 @ 25fps and 2000-3000kbps [for comparison: the videos i encoded were only 320x240, 25fps, 200kbps] without a problem! O.o So, why has it problems playing my less complex to decode videos?
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MPEG4
h.263
XviD (h.263/basic)
320x240
25, 29.9, 30 fps
AAC
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Will this be fixed in the next firmware? Hope so! >.
Cant nokia release some video coding tool with profiles for each phone model, to ensure flawless playback!? -.-
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I found the intel driver doesn't like xv output. In VLC go Settings > Preferences > Video > Output modules and set X11 video output. See if that works. If it does you can do similar things to totem using something in the gnome-media package (can't remember what exactly of hand...)

Bad Video Output -- with example

I've seen several people complain about the poor quality of the video output from FCE and this is something I've experienced myself so I'd like to find a solution. When people make these posts about quality, the usual response is that there must be some sort of user error or bad input. If that's the case, then the "correct" way to convert video remains a mystery to many of us. Let's shine some light on that dark corner...
To wit, here's a sample screen capture showing the original .MOV file from my camera on the left and the output of FCE on the right:
http://www.photo.net/photodb/photo?photo_id=5215575
Clearly something went awry in the conversion process, but it's nothing I've done explicitly. Perhaps you can help me identify what did go wrong, why it went wrong, and how to avoid it in the future.
First some details.
The original input file (on the left) came from a Canon SD700-IS camera and was put through a File|Save As process in Quicktime Pro to make it a proper .MOV file. Viewing the video clip within FCE, it looks just as good as the source version.
But once I've exported the entire sequence to a file, the video looks kinda crappy -- like in the frame on the right. Part of the issue is stretching the source 640x480 to NTSC 720x480, but beyond that it looks like the compression was done very poorly. Things are just a LOT blurrier and there's very little contrast.
The bottom line is -- what are some of us just simply not seeing.
Cheers,
ALF
Powermac Dual G5 2.3Ghz Mac OS X (10.4.4)

Hopefully this helps explain my understanding better...
I'm familiar with MJPG, but the video is not MJPG when I put it into FCE. The picture on the left has already been converted by Quicktime.
While MJPG is a series of JPG images and each individual JPG image is compressed slightly (I don't do lots of compression in the camera), the point I was making is that each of these frames is a key frame. When QT or FCE or anything else converts such a file it has a WEALTH of information to use and therefore image quality shouldn't degrade.
One of the things I don't understand is the insistence that upsampling is occurring. While FCE may indeed be upsampling, it SHOULD NOT BE because I've centered the input video within the 720x480 DV frame. No scaling need occur.
This is akin to making something smaller than 720x480 in After Effects, for example, and importing to FCE as an overlay for something. There should be no quality degradtion because that's not being scaled to 720x480 either -- it's just a small part of the screen.
There also isn't an issue with frame rate because, as I mentioned, the source video is 30fps. Any suggestion otherwise is assuming 15fps for the source video, which is incorrect.
The only thing that leaves as a factor is interlacing -- the source video is most certainly not interlaced. So as I understand things right now, the loss in video quality I've seen is due to artifacts introduced by interlacing and delta-compression. Because I've seen lots of example of delta compression which don't look this bad, I'm hoping there's some way I can tweak the amount of compression or something. Not much I can do about interlacing, though.
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The problem is how FCE treats 640x480 (or anything less than 720x480) video. By default it does indeed upscale to fill the full DV frame. But it also provides the ability to drop smaller video onto part of the frame as well as the ability to scale video within the frame.
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I also don't understand why interlacing would cause so much degradation, but as has been said it could be the combination of that and the (unnecessary) scaling.
ALF

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A wire may have broken inside the mini DVI to S-video adapter. S-video uses one wire for the brightness, and one for the color information. If the color wire breaks you will get a black and white picture. Until Apple replaces the adapter, you could use the composite video output, but the picture will not be as sharp.

Xf86-video-intel problems (resolution, DRI) [SOLVED]

I updated to day the xf86-video-i810 to the new *-intel driver and I encountered 2 problems. I have an old 845G card and an old CRT monitor that I use at 1024x786.
Problem 1: Incorrect resolution
The new native modesettings automatically reads the DCC from your monitor for the different modes and ignores your xorg.conf settings. So I ended up with a 1360x768 resolution and couldn't change it. The solution is to edit your /etc/X11/xorg.conf file adding the following:
Section "Monitor"
Identifier "My Monitor"
HorizSync 30-70
VertRefresh 50-120
Option "DPMS"
Modeline "1024x768" 86.18 1024 1088 1200 1376 768 769 772 803 -HSync +Vsync
Option "PreferredMode" "1024x768"
EndSection
Section "Device"
Identifier "** Intel i810 (generic) [i810]"
Driver "intel"
Option "Monitor-VGA" "My Monitor"
EndSection
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This way I forced the driver to use my settings.
Problem 2: no DRI
I also had no DRI after the upgrade (you can check it with the command "glxinfo | grep rendering"). Looking at /var/log/Xorg.0.log I found that it complained of not having enough memory for enabling it, and in the previous lines it said it was allocating something like 6000 lines for pixmap chache, so I thought that was the problem. I added an Option "CacheLines" "768" to the device section and with that it left enough memory for DRI (note that 768 is my resolution height (1024x768).
Section "Device"
Identifier "** Intel i810 (generic) [i810]"
Driver "intel"
Option "Monitor-VGA" "My Monitor"
Option "CacheLines" "768"
EndSection
Now everything works fine (Xv video, DRI). Performance is even a bit better when using Beryl or GoogleEarth (get a bit more fps in glxgears), and I didn't find any instability so far.
EDIT:
Another thing: Changing resolution crashed the server. This got solved by using the xorg-server-1.3 that supports xrandr. Now all works good, except that the KDE utility to change resolution has no effect. But it can be changed with the command "xrandr -s 1280x1024 -r 60" where -s is the size and -r the refresh rate.
Last edited by Bogart (2007-05-20 20:31:06)

OK - I finally submitted a bug report upstream: https://bugs.freedesktop.org/show_bug.cgi?id=76514
In making the bug report, I realized that I'm using some relevant packages from AUR, one of which was flagged out of date half a year ago: intel-dri-git. I'm going to see what happens when I switch from intel-dri-git and libdrm-git back to simply intel-dri and libdrm.
Last edited by colinkeenan (2014-03-23 16:59:56)

DVI output problem

Hello,
I have a 1.83Ghz Core 2 Duo Mini that will not output any video over DVI.
I have connected the Mini via DVI to three known-good monitors (Apple 20in Cinema Display, Gateway 22in HD LCD, and an Acer 22in LCD) and can't get any video output. I get a startup chime, drive noise and a power light, but no video.
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The Mini will display video using the Apple-supplied DVI-to-VGA adapter when connected to the Acer and Gateway displays.
When I took the Mini to the authorized service center, they said they couldn't replicate the problem. So I'm a bit stumped. Has anyone here had similar problems and/or solutions?
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I once had a similar problem. For testing I did not bother to screw in the retaining screws on the plug into the monitor. Could hve kicked myself when, after screwing them in, it worked fine.

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OBJECTIVE: I need to go from that to an NTSC TV so I can see what my edits look like.
NOT SURE: I have seen the Apple adapter (http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/7200505/wo/0K4TK pkMz7f922WszZYxFQMUy31/1.0.19.1.0.8.25.7.11.2.3) but it says it is for the MAC mini and the G5 only... does that mean it won't work for me?
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the other options are not what you need.
cherios,
∏

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I just found out that the video out (TV) on the new nano supports video playlists so you can create playlists for back-to-back display on the TV. Not even the AppleTV will do that (even though the latter has been a highly requested feature for the AppleTV since day one). In fact, if you can do without the on-TV menus you may find that the nano is a better video output device than is the AppleTV (that is, the menus system on the nano doesn't appear on the TV output).
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Quad video output problem @ 640x480

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