Feature request: support tgs and Lottie

[LuckyTurtleDev]

I would like to be able to convert telegram stickers (tgs) to gif's.

Draft

A tgs is a Lottiefile inside a gzip archive.

[197g]

Lottie seems to be both an animation, and a vector graphic. Those two are probably out of scope (in terms of available contributor bandwidth and architectural readiness). It would probably work if we there was a Rust implementation that we could create bindings to.

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And this is where my comment would have usually stopped. But then I went into discovering what it actually is. Started out good, open file format. But then: their own 'sell' is also technical incorrect:

• You can animate an SVG: proof
• Their own page about SVG to Lottie uses no vector graphics and, apart from their incorrect point on animation, lists only positives for SVG... ?

This just makes me want to hard no. This together with the fact that their cough SEO-heavy cough writing style, their first links being shoved in my face being a) marketplace b) buy this course c) hire a developer; This reeks of manufacturing an artificial demand, fits with that company being VC backed recently as well. I don't see going a better way in terms of compatibilty than Adobe Flash, and yes you can call me out for being incorrect if this turned out to be incorrect in 20 years from now. (Fits that they are quite literally integrating mainly with Adobe Products).

I'm not saying I'd veto a merge if there were a library for decoding into pixmaps; but I'm surely not going to spend any effort on its implementation. We can keep this open for a while but unless someone offers themselves to back at least some level of implementation this is just not actionable and I'd be in favor of closing.