We use several different cameras but in the end it is produced out as an mp4 with 5.1 surround sound. 29.97 FPS.
I have many films already on Amazon and other places but lately Amazon has been a big pain to get something published.
At one point TS told me that they could not publish anything for anyone as they had a software issue. So I had to wait a long time ...I finally grew tired of waiting and questioned them again. This is when they started saying the film file was rejected, but didn't offer a reason. Later after re-submitting and numerous TS contact I was hit with the VFR problem. But I also got an audio issue before that.
I think Amazon is going through some updates and are having issues with the process.
Here is my IMDB page in case you would like to see my list of films. -
https://www.imdb.com/name/nm2212798/
I will try to update if I happened to get some answers or anything new published on Amazon.
Also I used Handbrake on a couple of the films I have in limbo....and I'm still waiting. One film has been in limbo for well over 2 months.
Thanks
Tom