I use VLC media player to capture smaller clips with the recording function, then I import those clips to Photoshop with "import video file as layers". (Finding where VLC puts them can be a challenge!) Photoshop has a setting for getting the interface set up so you can see your individual frames at the bottom.
The most important thing I learned is that a frame rate of 0.07 seconds is what looks most natural. Then you can use adjustment layers to play around with brightness, contrast and other values for the entire set of frames (you just need to make sure your adjustment layer is on top).
Finally in Photoshop you export your gif through the "export for web (legacy)" option. It's where you can see how big it's going to be and what it will look like in action! (It's very easy to make huge gifs. Tumblr has a 3mb limit, but I if you have a good place to host them you could go bigger? The easiest way of making them smaller is through limiting the dimensions, number of frames and colors. Using fewer colors will make it look less nice though!)
There's lots of good tutorials out there, so if you want to have a go I hope you can find something useful!
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The most important thing I learned is that a frame rate of 0.07 seconds is what looks most natural. Then you can use adjustment layers to play around with brightness, contrast and other values for the entire set of frames (you just need to make sure your adjustment layer is on top).
Finally in Photoshop you export your gif through the "export for web (legacy)" option. It's where you can see how big it's going to be and what it will look like in action! (It's very easy to make huge gifs. Tumblr has a 3mb limit, but I if you have a good place to host them you could go bigger? The easiest way of making them smaller is through limiting the dimensions, number of frames and colors. Using fewer colors will make it look less nice though!)
There's lots of good tutorials out there, so if you want to have a go I hope you can find something useful!