TGS animation support

[sot-tech]

Fixes #340

Added tgs file converter.
Converts animations using external utility, which uses Samsung/rlottie library.
So to get it work, utility and libraries are also needed in the system or in venv.

I tried to use tgs library but it generates very... strange images (with a lot of artifacts).

[tulir]

Thanks! This looks great. The performance is a bit of a concern (see third thread comment), but it should be solvable

[tulir]

@Eramde is this ready?

[sot-tech]

@Eramde is this ready?

@tulir Sorry forgot about notification. Yep, i fixed propblematic places and utility can now export to png sequence with defined framerate, so there won't any problems with animation speed when ffmpeg is used. I discarded using bash script and call ffmpeg process from python, i thing this is better.

[tulir]

Yeah, the script is only needed if it needs 100 calls. If it's just one or two, it's better to do from python

[sot-tech]

Little changes to build converter script (using release conf) (see here)

[tulir]

@Eramde building with the release conf seems to make the webm conversion fail with a lottieconverter error and exit code -11

[sot-tech]

@Eramde building with the release conf seems to make the webm conversion fail with a lottieconverter error and exit code -11

Sounds strange, because Debug and Release builds differs only g++ build keys (-g vs -O2), and memtest does not show any possible problems (-11 exit code is probably segfault). Could you, please provide input file to check?

[bendschs]

is there a guide somewhere how to use this?
cheers
bendsch

[sot-tech]

is there a guide somewhere how to use this?
cheers
bendsch

Hello. Just build utility, place it into one of $PATH's folder (i.e. /usr/bin) or python's venv/bin and set configuration. I don't exactly know if @tulir 's docker image already has utility...