I make all my videos using Photoshops CS3.
When I download all my Adventure Time episodes they’re normally always in a format that isn’t supported by Photoshop. So I downloaded this video converter so that the videos would be converted into a format that would work.
So after I’ve done that I drag the video into Photoshop. The first thing I do after that is change the size of the image (Image>Image Size) so that Tumblr will let me upload it.
I usually make mine 500px
After that open up the animation window (Window>Animation)
Then find the part of the video you want to make a gif and adjust the little tab things at either end so that only the scene you want will play.
After you have the scene you want go to save it.
Don’t click Save or Save As, though. Go to Save For Web And Device.
Make sure this little thing is set to GIF
Then, go down to where it says Looping Options.
Click that and select “Forever”. This way the gif wont stop after one loop.
Then in the bottom left corner check the size of your gif. It wont upload properly if it’s more than 500K
Mine is a little too big. If this happens either go back and select less of the video using the tab things, make the size of the video smaller or play around with some of the setting to the right hand side (like Colours, Dither and Lossy) when in Save For Web And Devices. I find it easier to select a smaller section of viedo but whatever works, I guess.
When you’re happy with the gif and it’s less than 500K save it and you’re done :D
You have (hopefully) made yourself a gif.
I’m sorry if this isn’t really clear and my explanation is crap but that is how I make my gifs :)
If you have any questions don’t be afraid to ask.