Telegram: animated stickers

[Oreolek]

Telegram introduced animated stickers in TGS format. They don't get converted to PNG. And the browsers can't show them either. Maybe convert them to APNG?

[42wim]

Sure, do you know a library that can do that?

[Oreolek]

No and we'll have to wait until this will be in the open source Telegram version.

[TomTheDragon]

The only tool that could do something like this (right now) is the python package TGS. It could convert those files into video or GIFs.
https://gitlab.com/mattia.basaglia/tgs

[BenWiederhake]

There is the python library lottie, and after a single pip3 install lottie cairosvg you can convert stickers like this:

$ lottie_convert.py example.tgs example.webp
WebP frame rendering completed
WebP Writing to file...

Which results in a webp file (and GitHub can't deal with WebP yet).

Can this plus tengo do this? I hope that the image is already somewhere on the filesystem, in which case Tengo would need to intercept the outgoing message, call lottie_convert.py --input-format lottie /path/to/the.tgs.webp /path/to/the.webp, and modify the message to point to the new file instead (/path/to/the.webp).

Is there anyone here who knows tengo well enough?