Libavcodec.so.56 not found

[Brny]

So, i tried it, and i done all the whole process, explained here, building it:

[Tutorial] - Build (or download) FFmpeg/libavcodec with MMAL support (hardware acceleration video decoding)

What is FFmpeg ? Source wikipedia : Why I need it ? FFmpeg is use by a lot of sofware like vlc, firefox, mpv, chromium and a lot more ! It use libavcodec library which is part of FFmpeg which contains all decoders, encoders and parsers of each type of video/audio formats. Okay, but why I need to build it ? It is on ubuntu mate repository ! Yes you are right, it is on ubuntu mate repository so you can install it by : sudo apt-get install ffmpeg But you will not have the accelera…

Only, i installed the 2.8.6 instead of the 2.7.6, but i think here is not the problem.

I arrived to the last step of the installation, the last message is "Processing triggers for libc-bin (2.23-0ubuntu0)" , and then, prompt.

I had done the verification and it appears the ffmpeg56 so it looks like everyting has gone perfect... BUT when i try to open the executables i get again the exact same message... and nothing opens.

So... it really doesent work... someone can help me please? some developer?

Thanks!