Videos Darkening Upon Resize

[phazer11]

Hello, I'm currently working on a video for a class project and I've run into an issue I've never seen before (even as a fansub encoder) whenever I resize the video at all either inside the video editor or after exporting a lossless copy and importing that using AviSynth the video darkens horribly I've tried everything I can think of. Changing the colorspace, changing codec, changing resize filter, etc. I have no idea what is causing the issue. If I export the video at the native resolution as either lossless or in a lossy codec such as H264 it looks fine. If I import that fine looking exported video and resize it, it darkens again.

[newpball]

You are leaving out some important details: CODEC and color space going in, the name of the video editor, CODEC and color space going out.

[LMotlow]

Yep, agreed. We need more information. Start with the original source. You can use MediaInfoXP to copy the full text ("Text View") of the video data and paste it here. Better, a short sample of your unprocessed original can be submitted. When you say "resize", it could mean a lot of things. More info, please.