ffplay won't play videos in Documents subfolders, firejail configuration issue

Question

I have a subfolder of ~/Documents where I want to store various videos (.mp4 files). I don't particularly want to move them to the ~/Videos folder because they contain other files which are not videos.

I have firejail active (version 0.9.66). When attempting to play one of these videos (with ffplay or the Video Player) I get a message "No such file or directory" however the file does in fact exist, and I have permissions to read it. Also, I can use ffmpeg to make a copy of the file, no problems.

The exact same video plays correctly when moved/copied to my home folder, so there is not an issue per se with the video or ffplay.

I am guessing I need some sort of amendment to my firejail configuration to permit videos to play but I can't work out what it is.

Inside the file /etc/firejail/ffmpeg.profile I added a line (below) which didn't help:

noblacklist ${MUSIC}
noblacklist ${VIDEOS}
nowhitelist ${HOME}/Documents    <--  added this line

I can't see offhand what else to do. Is there a different configuration I need? Do I need to reload the configuration somehow?

My Ubuntu version:

Distributor ID: Ubuntu
Description:    Ubuntu 22.04.1 LTS
Release:    22.04
Codename:   jammy

Answer 1

The amended (third line below) line should have read noblacklist.

In the file /etc/firejail/ffmpeg.profile.

Add the third line below after the other noblacklist lines:

noblacklist ${MUSIC}
noblacklist ${VIDEOS}
noblacklist ${HOME}/Documents

That fixed the issue. I'm kind-of embarrased to have solved it after posting this, but I'll leave this question here in case it helps someone else. Or you can vote to close it. :)

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I still have the problem with the "Videos" player.

It seems the default video player is called "totem". Adding the above line to the totem.profile file didn't help, however this did:

In the file /etc/firejail/whitelist-player-common.inc add the line

whitelist ${HOME}/Documents