Some filters are missing

Hey,
First of all, I like this program quite a lot! It is pretty stable, and has most of the features I need for my basic video editting needs!

However I have some trouble to use some of your features!
I dont see any of the HTML filters (3D text, HTML overlay, …)
Is there something I need to do in order to have those filters enabled?

I am on a linux machine (arch linux) and installed it through my package manager (yaourt).
I think it installed all the necessary dependencies, like frei0r.

In the log file, there are 2 noticeable things:

  • [Warning] mlt_repository_init: failed to dlopen /usr/lib/mlt/libmltsox.so (libsox.so.3: cannot open shared object file: No such file or directory)

    • The file /usr/lib/mlt/libmltsox.so does exist…
    • I dont know where to look for the libsox.so.3 file…
  • [Debug ] FilterController::loadFilterMetadata reading filter metadata “webvfx_circular_frame” “meta.qml”
    [Debug ] FilterController::loadFilterMetadata reading filter metadata “webvfx_ruttetraizer” “meta.qml”
    [Debug ] FilterController::loadFilterMetadata reading filter metadata “webvfx_threejs_text” “meta.qml”

    • It seems to read the filters, but not load them in… (there is no ‘added filter’ line underneath)