W:Failed to fetch http://ppa.launchpad.net/kirillshkrogalev/ffmpeg-next/ubuntu/dists/vivid/main/binary-amd64/Packages 404 Not Found
W:Failed to fetch http://ppa.launchpad.net/kirillshkrogalev/ffmpeg-next/ubuntu/dists/vivid/main/binary-i386/Packages 404 Not Found
E:Some index files failed to download. They have been ignored, or old ones used instead.
This is the error output. What's reason for this and what is a good solution?
W: Failed to fetch http://ppa.launchpad.net/kirillshkrogalev/ffmpeg-next/ubuntu/dists/vivid/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead. Warning: apt-get update failed for some reason PPA to be removed: kirillshkrogalev ffmpeg-next Warning: Could not find package list for PPA: kirillshkrogalev ffmpeg-next
– Adrians Netlis Oct 12 '15 at 12:35/etc/apt/sources.list
file in you question? – TellMeWhy Oct 12 '15 at 12:49