HuffYUV problem

[Mr C]

Hello,

Since yesterday I've been trying to encode a sample video with Huffyuv. For the sample video I used a simple AviSynth script to paste 3 raw video yuv file together.

Software versions: AviSynth 2.53, VirtualDub 1.6.9, ffdshow-20050803

I enabled Huffyuv encoder + decoder in ffdshow, also in VfW configuration. I loaded the avs script in VirtualDub, then chose Video - Compression en picked the ffdshow Video Codec - Configure and made sure the HuffYUV codec was selected. Then I saved the project in VirtualDub as an avi file. It started processing.

So far so good, ... But when I try to play the file with Media Player, the image looks very dark. When I load it in VirtualDub, there's no problem.

Could this be a problem with Media Player? Or am I doing something wrong here?

Grtz

[Leak]

So far so good, ... But when I try to play the file with Media Player, the image looks very dark. When I load it in VirtualDub, there's no problem.
I'd guess that's more a problem with the overlay settings of your graphic card. VirtualDub probably doesn't use the overlay, while Media Player most certainly will.

np: Jonas Bering - Diabolo (Sketches For The Next Season)

[Mr C]

:sly: Wtf? Seems like I have the same problem with XviD, DivX, 3ivX,... encoded video's. They all play well in VirtualDub, but they all look dark in Media Player. I didn't change any configuration in MP and they allready played in good quality in Media Player though. Any suggestions?


Edit: Ok, fixed the problem. Seems you were right Leak. :) Appartently some setting in Media Player. Don't know why it changed suddenly...

This is what I did:
Tools -> Options -> Performance
Video Acceleration -> Advanced
Uncheck 'Use Overlays'

Now the video isn't dark anymore. One (basic) question, what's overlay?

[Leak]

Now the video isn't dark anymore. One (basic) question, what's overlay?
<lecture-mode>
It's a way of accelerating the display of videos and kinda works like the picture-in-picture function tvs have - you hand the video as-is to the graphics card, let the graphics card take care of color space conversions, image adjustments and scaling and after that it "overlays" (thus the name) the video over part of the screen, normally by replacing a specific color with the video.

Also, you can tell graphics drivers to just take the overlay's content and display it full screen on the second monitor or via tv out.

Disabling it should thus only be a last resort; if you're using ffdshow anyway there's an "overlay" page where you can adjust the overlays brightness, contrast, hue, saturation, sharpness and gamma, or at least as much as your graphics card supports.

Also, all nVidia and ATI drivers that I've used until now also have their own configuration pages for the overlay, so poke around a bit.

Moreover, there seems to be a recent trend in graphics drivers to set up the overlay settings far from neutral when you install a new version, which might be the cause of your problems... :(
</lecture-mode> :D

np: Galoppierende Zuversicht - LIVE @ [KONTROL] San Francisco - June 18 2005

[Mr C]

THX Leak , :goodpost:

now that's an explanation!
Disabling it should thus only be a last resort; if you're using ffdshow anyway there's an "overlay" page where you can adjust the overlays brightness, contrast, hue, saturation, sharpness and gamma, or at least as much as your graphics card supports.
Ok, so I enabled it again. Guess what... it worked, no dark pictures. :sly:
I use ffdshow, tried to adjust the overlay settings, but they were all disabled, so I guess my on board graphic driver doesn't support it.

Anyway, thanks for the great answers...