Different colour output after compression

perthskies · Post by **perthskies** » Sun Jul 17, 2005 2:33 am

I think it has to do with the decoder, but maybe someone can give me a better explanation.

Why is it, that when you optimise the colour, brightness, contrast etc. nicely through AVISynth/VirtualDubMod, it just doesn't look the same when you play the compressed file (e.g. XviD) in a player? It just seems... not as bright, and less saturated in terms of colour.

Yet when I open that in AviSynth/VirtualDubMod the colour and brightness is the same as if it were uncompressed, but not played in a player.

OK, maybe I complicated myself. To rephrase, why does a HuffyYUV AVI file look different (in terms of colour and brightness) to a XviD AVI file (no matter what bitrate). Any help would greatly be appreciated. ^^;

Zero1 · Post by **Zero1** » Sun Jul 17, 2005 7:42 am

I know exactly what you mean, it's the fault of the video overlay.

Since my monitor has a lot of red in it, I calibrated it via the Radeon control panel, but it doesn't seem to apply it to the video overlay, so my videos look nasty and red.

Not a lot you can do other than using VMR9

Zarxrax · Post by **Zarxrax** » Sun Jul 17, 2005 11:53 am

Even using VMR9, the overlay screws up colors on my pc. Only surefire way I have found to disable the overlay is to completely disable any decoders from decoding xvid videos, forcing the VFW decoder to decode them.