How to remove every second frame from an animated gif?

Question

I have a folder full of videos that I want to convert to an animated gifs. ffmpeg/avconv does a bad job of doing it directly, so I instead convert the video to a gif by first outputting each frame as a png and then converting back to gif using imagemagick. The problem is that this results in a large gif in terms of file size. To solve this I want to "drop" every second or nth frame from the gif, either by skipping every image file when converting to a gif or by removing frames from a gif. How can I do this on Ubuntu (13.04) using imagemagick or some other command-line utility?

Answer 1

This can be done in Adobe Photoshop CC. Depending on how long the gif is and the resolution, there is an animation workspace that shows individual frames that can be manipulated or deleted.

You could also re-export the gif from a program like Adobe Premiere pro and just change the Frame Rate.