MoreMcmeta

In reply to amogus9000:

 This is only possible if you manually specify the order of the frames:

{
    "animation": {
        "frames": [0, 2, 1, 3],
        "width": 8,
        "height": 8
    }
}

In reply to amogus9000:

 MoreMcmeta supports organizing the frames like this if you specify frame width and height:

0 1
2 3

To compare, the order you asked about was:

0 2
1 3

If organizing the frames that way does not work, the next simplest way to fix it would be for me to generate the list of frame indices for you with a short script. It would also be possible for me to write a short program that could reorganize the frames and produce a new image, but you would likely have to wait longer for me to write that.

In reply to amogus9000:

 You'll need to send me the original image with all the frames. Since the image sounds large, it's probably better to DM that to me through CurseForge so it doesn't fill up the comments. A program should not have problems with frames numbering in the thousands. The next few days will be a bit busy for me, so I will try to work on that when I can.

The only thing I would have concerns about is how much memory your animation will require. Minecraft uses 4 bytes per pixel to store colors. The total number of pixels in your image (all frames) will be kept in memory while Minecraft is open. Using thousands of large frames could cause Minecraft to run out of memory if you get into several-gigabytes territory.

The animation would have to be really excessive to be that huge. If this becomes a problem, you would need to use lower resolution frames or remove frames. However, MoreMcmeta does not keep interpolated frames in memory; maybe you could get a good enough result by removing some frames and letting MoreMcmeta calculate the transitions between frames on the fly.

In reply to amogus9000:

In reply to soir20:

 Another thing I should mention is that the smallest possible unit of time between frames is 1 tick (1/20th of a second). You cannot have fractional parts of a tick between frames. So if you have more than 20 frames per second of the video, your animation will look like time has slowed down.

In reply to dangamerx7_twitch:

 Fresh Animations adds different entity model animations, not texture animations like MoreMcmeta supports. You'll need a custom entity models (CEM) mod for that.

In reply to DylanthalusCodus:

 Yup, it works on 1.18.2 (just tested). You may need to update Fabric API to its 1.18.2 version, though.

In reply to DylanthalusCodus:

 Hmmm, it seems a minor Minecraft code change in 1.18.2 causes a crash on Forge, but not Fabric. I'm going to release a new version, though you should be okay using the 1.18.1 one on Fabric.

In reply to Mister_Ron:

 Because Minecraft doesn't use a separate texture for the angry endermen, the animated skin would apply to all endermen. This feature doesn't quite fit with what MoreMcmeta does, but I like the concept, so I'll add it to my list of mod ideas. Such a mod could then be used with MoreMcmeta to animate that texture.

In reply to elegantattire:

 I'm glad you like the mod! Updating to 1.18 is definitely planned. I haven't had a chance to start working on an update, though, so I don't have an ETA on when that will be done. I'll reply to this thread once it updates.