I understand this question has been asked but I cannot find a solution to my particular problem.
When I try to animate my video project I get the error 'The Encoder Timebase is not set' - through this forum I found out that when I imported my video Blender changed it from 60fps down to 59.96fps.
Before animating I changed the fps back to 60 which allowed the animation process to begin. When my video had rendered I found that the audio tracks seem to have multiplied and overlayed each other. I also found that my Movie sequencer had lots of extra audio in it. In addition to this I found my outputted video had severely dropped in quality from the original 1080p.
Thank you so much for any help, total beginner here having a meltdown!