Hi all
Ive been having some trouble with a new computer not displaying video properly. When playing video in realplayer or windows media player 11 the picture goes very dark (and isnt helped by tweaking video properties inside the software). I have tried playing DVD with "DVD X" and mp4 through quicktime and these two work fine.
Is this a problem with a codec or something?
Many thanks
Theholygod
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If all files are doing it, you need to adjust your display card overlay settings.
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not all files are doing it. I said dvd's are playing fine and quicktime is playing mp4's fine.
If the changing overlay settings still applies here, how would i go about doing it? -
Quicktime doesn't use video overlay so the fact that it plays fine doesn't eliminate an overlay problem. Don't know about DVD X.
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Morning everyone.
I think I may have found a clue and the answer to everyone's trouble
with Dark vs. Bright videos.
Its like this..
A Non-Overlay mode, RGB [R/G/B:0-255] color range..
Those who have "first" started out viewing video on their computer and
their video's were playing Dark, has been doing so in non-overlay mode.
When you view video in this manor, the video is usually Dark'er. This is
normal because your software player is playing in an RGB mode and is using
the 0-255 color range, all color components.
Likewise,
A Overlay mode, YUV [Y:16-235, U/V:16-240] color range..
Those who have "first" started out viewing video on their computer and
their video's were playing Bright, has been doing so in an Overlay mode.
When you view video in this manor, the video is usually Brighter**. This is
normal because your software player is playing in an YUV color space mode and
the color components, [Y:16-235; U:16-240; and V:16-240] are set to this color
range.
** Video source based on DVD / MPEG share the same color space attributes of
the YUV color space model. Brightness range is usually within the standard
[Y:16-235, U/V:16-240] values, which will play "brighter" in your player vs.
Darker when other software player is not using Overlay mode, will instead use
the RGB and 0-255 color range, which will play "darker".
And now, for the answer to the clue..
The point of all this is that, those who started out viewing video, and it was
Dark'er looking, and when they one day get a video who is playing Brighter,
they think that their video is bad, and needs adjustment.
or,
..those who started out viewing video, and it was Brighter looking, and when
they one day get a video who is playing Darker, they think that their video
is bad, and they feel it needs adjustment.
But, the answer is a simple one. Understanding each other.
The viewer of those videos only need to know a few simple things:
SOURCE: DVD/MPEG = Brighter -- YUV color space model -- [Y:16-235, U/V:16-240]
SOURCE: AVI/divX/XviD = Darker -- RGB color space model -- [0-255]
However, its only fair to note here..
When the source is an avi, etc., it will usually play in RGB range, but there
are *those* software that can also play even these video sources in the YUV
color space model and range noted above. Confusing, I know. But this his
how things are today, confusing.
oh, yeah.. let me give you an example of confusion.
A user D/L's an XviD video. He know's (from past experience) that he can
open this (avi) video inside virtualDUB, and play with it, or frameserve
it into an MPEG encoder. When he views this in vdub, he knows that the
video is normal or correct.. or, darker. So, he's happy as usual.
But, he decides that he want to play it using Windows Media Player. So,
he launches the player, and opens this same XviD video. Guess what ??
it is Brighter
Is it borked ?
No. Its, understanding. You see, recall from above, when your AVI video
source was playing in a familiar player/editor, (in this case, vdub) the
video player/editor was using the RGB 0-255 color space, hence dark.
But, when you switched player's, the player was using YUV instead, hence
brighter.
-vhelp 4144 -
It doesnt seem dark in comparison to other formats, its dark in comparison to how it plays on annother computer.
The video files i have are playing so dark they're not worth watching, it doesnt seem a minor preferance tweak or anything. Something is definately wrong and its either the software or the hardware.
If you read my first post, you see that im not trying these files through different types of software, im running the different video files through different programs.
Quicktime - plays fine, exactly as it plays on my other pc
DVD X - exactly the same as above, and plays same as on tv
Realplayer - DARK (worked fine on other pc)
WMP 11 - same as above
I actually imported a small clip into windows movie maker and suddenly the brightness was fine. Now i assume this means the software is to blame. -
It probably means your overlay settings are screwed up.
Since only one program at a time can use overlay, try starting 2 instances of mplayer2.exe (found in the WMP folder) and play the same video each instance. If one looks good and one looks bad you have an overlay settings problem. -
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Look, i KNOW the video isnt displaying properly. What im asking for is the solution to the problem.
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Control Panel -> Display -> Settings -> Advanced... from there it differs depending on video card and drivers. Look through the tabs for Overlay settings. They may not be labeled Overlay. Maybe Video or Theater settings.
Often turning overlay off then back on fixes problems (especially after video card or driver upgrade). If there aren't explicit overlay settings go to the Troubleshoot tab and turn Hardware Acceleration down, Apply, then turn it back up. Or you may just need to adjust Contrast, Brightness, Hue, or Color sliders. -
Originally Posted by theholygod
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Got it sorted, many thanks to jagabo for helping.
It was an overlay problem in the end edDV, just as i thought.
Again, thanks everyone, this really helps.
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