Statically link `ffmpeg` to reduce AppImage size

[fiftydinar]

Same like it's done in scrcpy.

https://github.com/Genymobile/scrcpy/blob/master/app/deps/ffmpeg.sh

[Samueru-sama]

Yeah the only reason I have been able to do it with scrcpy as well as mpv is because both projects provide build scripts that build the app with a static ffmpeg.

Doesn't look like gsr has such script. Anyways before I try anything:

cc @dec05eba Are you interested in providing such script?

ffmpeg has a lot of dependencies (it ends up linking to about 80 MIB of libraries in total not including x265 which adds another +20 MiB or so)

Linking statically would make the AppImage a lot smaller like example:

• mpv

• scrcpy

providing the option to build gsr with a static ffmpeg also prevents issues from people building the binary on distros like fedora with their codec nonsense and also it is likely the whole reason mpv makes that script lol

[dec05eba]

@Samueru-sama I dont have any interest in working on that, but i'll accept a patch that adds support for that. I currently build ffmpeg from source in the flatpak though: https://github.com/flathub/com.dec05eba.gpu_screen_recorder/blob/master/dependencies/ffmpeg.yml (which also includes x264 which is not really needed, it's only needed as a fallback if no hardware encoding is found).

[Samueru-sama]

Thanks to pkgforge-dev/archlinux-pkgs-debloated#26 the AppImage is now 25% smaller.

I thought the difference was going to be bigger, ffmpeg is massive omg