I'm trying to upload an AVI file to make a GIF, but whenever I go to File-Import-Video Frames to Layers all of my layers are blank. When I tried to play the click in QuickTime it told me to download an extension or something. I downloaded Xvid, but still it's not working.
Have you tried something cheesy like Windows Movie Maker to load the avi, then save a frame to image? Do you have any video editing software? Even the simplest of software should let you export frame to image.
Yes, PS (or most Adobe apps for that matter) are picky about CoDecs and formats. As suggested, convert it externally. There's gigazillions of free tools like Virtual Dub or ffmpeg derivatives that can do it...
Branched discussion to new thread.
"I have Windows Live Movie Maker but I still couldn't get it to work there. I'd really rather be able to do it in Photoshop anyway I just can't figure out why all of my layers are showing up blank."
You may also try playing the video, pause it, print screen. If you are using Windows Media Player, you may have to go into your settings to adjust (I can't think of the setting right now) in order to actually capture the video stream (instead of just the interface). I think VLC Player might work for you. Why does it matter what program you use to get a frame grab? You can always use Photoshop to edit that frame grab, but don't limit yourself to using any ONE program to try and do soemthing if you are having issues.