>>8818407
Place the animation frames in the same folder as FFMPEG, much like in step 1.

Afterwards, open a terminal again and type in the following command:

ffmpeg -framerate <framerate> -i image%d.png <output filename>.webm

This will combine the images into the an animated webm, like so:
>https://files.catbox.moe/16ek20.webm

A couple of things to note:
1. Since most animes run at around 24 FPS, framerates around 12-14 usually look the best. If you REALLY wanna match the source as closely as possible, you'll have to duplicate each repeating animation frame in the loop and set the final framerate to 24.
2. Even widths and heights are your friends. If your final video resolution has an odd value, I suggest cropping every frame down a pixel to make it even. That will make it easier to scale the video down to fit 4chan's size limits.
3. Practice makes perfect. Sometimes your stitches will look crappy, and that's okay. In my experience, all the GIMP-related steps are the biggest sources of mistakes and/or problems. Keep at it and you'll improve like I did.

To shrink the WEBM above to fit 4chan's size limits, alter the command above to the following:

ffmpeg -framerate <framerate> -i image%d.png -vf "scale=<new width>:<new height>" <output filename>.webm

For my example, I did the following:

ffmpeg -framerate 12 -i image%d.png -vf "scale=1224:540" output_small.webm

And that's the webm you see on this post!

Thanks to anyone who read my giant-ass spiel. Happy stitching!

/h/ - Hentai

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