[Linux] snap: Cannot access files outside of /home/, misleading error message

[nschloe]

When installing losslesscut under Linux via a Snap, it cannot access files outside of the user's home directory (like all snaps). When trying to open a file in /tmp/, however, the UI says

Unsupported file

This had me pulling my hair out for a file, so perhaps the error message can be improved.

Note that the developer console says

/tmp/video.mp4: No such file or directory

[mifi]

aw snap! so did you manage to solve the underlying issue? so the problem is only that the message is misleading?

[nschloe]

The underlying issue is a snap "bug" (see also so), but I don't know if it will ever be resolved. The error message should be clearer indeed.

[mifi]

I'm not sure how I can make llc support /tmp, but I will fix the issue with unsupported file

[mifi]

Could be related to #410

[mifi]

LLC will now check for permission to open file before opening it and give a better error, so this should be resolved