I created my own Blender build as I needed to add a "change font" option to the text effect in VSE (see here : https://developer.blender.org/D2424#a4349b1b)
But now Blender cannot load any video or audio format into the VSE. I'm getting the following error in the GUI :
Report: Error /!\ File '/path/to/file/filename.ext' could not be loaded
and this in the stdout/terminal :
$> not an anim : /path/to/file/filename.ext
As seen on this topic : Cannot load movie files on Ubuntu I assume it could be an issue with the linking of my FFMPEG library or something with my CMakeLists.txt (which I didn't modify fyi). Thus, the preceding thread's solution is "Download precompiled version of Blender" which I don't want since I need the feature I implemented.
It may also be good to point out that I'm a total beginner with C++ (I only have some experience in C and web dev) and that I'm currently running Ubuntu 17.04.
Thank you for your time