Rendered H.264 .mp4 video file starts again from the beginning at some point of the file
Hello!
I`m having an issue with Premiere pro and Media Encoder, so this happens no matter which of them I use to do the rendering/encoding.
When I try to render an .mov file into an .mp4 using H.264 Youtube 2160p 4K Ultra HD -preset, my rendering goes through normally, but at some point of rendering it starts the videofile from the beginning.
So for an example it renders 3 minutes of my 17 minute video, and then suddenly continues rendering the file but starts the video from the beginning (where the first 3 minutes started from).
So I end up with a .mp4 videofile, that is 17 minutes long and has for example the first 3 minutes of the video correctly from the start, but then it suddenly starts again from the beginning of the original file and then the rest 14 minutes of video are out of sync with the sound by those 3 minutes that it rendered first. And the last 3 minutes of the video are missing, so its not like i can just sync it again with the sound, like i could if the rendered video file was those 3 minutes longer (so 20 min), since it comes out as the same lenght as the original (17 minutes).
The sound is normal through the whole file, it doesn´t start again like the video does.
I have never had this kind of issue before.
I have also tried using older versions of Premiere and Media encoder (versions 13.1.5) and the problem is still happening.
And before someone suggest these most obvious fixes:
I have uninstalled and reinstalled Premiere, Media Encoder and even the Creative Cloud desktop app multiple times now. Yes i have restarted my PC and yes i have tried different presets for rendering. And the .mov file it self works normally.
I´m sorry for my confusing explanation, english is not my first language and it´s hard for me to explain something like this.
Please send help!