I've got a heap of video tracks on my timeline, some muted - through clicking the track mute button - and some not.

For some reason all my video tracks, muted and unmuted, are now muted. I'm aware under 'Options' there is a 'mute all video' option but this is not checked, so that is not the source of the issue.

I don't know what I did to bring this state about but it is most frustrating. Does anyone have any ideas as to why this has happened?

I have restarted my program and file to no avail...in fact, as a result of doing this I can no longer backup...hmmm...

Thanks...

Just found a post somewhere else from John Rofrano mentioned accidently soloing a track...

That was it...

...problem solved...

Nice job, glad you found the solution!