sound and picture are asynchronous after export

[Niklas5E1E]

Hi everyone, I have a problem with a premiere per project, that the picture "speeds up" after export (so sound and picture are asynchronous in the exported mp4 video), must have something to do with the framerate. I recorded the raw material with a Canon SLR in 1920x1088 and 25fps. The music files are in 44100Hz. Accordingly I set my sequence in Premiere.

If I now export my project in low quality ("mobile device" in 854×480), it will also play it in 25fps and it runs synchronously, but if I export it in 720 or 1080 quality, the mp4 file is in 30fps (and therefore asynchronous). Can this be due to my computer performance?!
Is it maybe a problem that my intro was created in 30fps?

I would like to export it in 1920×1020 quality (for uploading to youtube). Here is a screenshot of my export settings:

Does anyone have any ideas? Would be super grateful!

Thanks and best greets, Niklas

[Michael Grenadier]

mixed frame rates and audio can cause intermittent problems.  In most cases Premiere will handle anything you throw at it, but you might want to convert everything to 25 fps 48k 16bit audio (the standard for much of the world except the center of the universe, the USA where I live - I'm being snarky if you wonder). before bringing in to premiere and edit into a sequence with this settings and see if that solves the problem.   

[Niklas5E1E]

hey mgrenadier! thanks for you quick answer! but even after converting the intro to 25fps it still does not work.... the export file is still in 30fps. I used a lot of nested clips and sequences - could this be a reason?! Or do you have any other ideas?

thanks again! niklas

[Michael Grenadier]

yup, I suspect nests could cause problems.  .  I'm working on a very complicated piece most of which was shot at 23.976  fps (24p).  I did have a nested sequence and within the nest was a subnest with iphone footage at 29.97fps.  Most iphone footage is variable frame rate but I'd already converted it to constant frame rate using handbrake.  When rendering and playing the complete timeline, that nested section did lose synch, but if I doubleclicked on the nest and played the nest it was in synch.  I rendered the subnest, and nest and then everything played properly in the complete timeline.  your mileage may vary.  But this is a good place to start and see if you can fix it.  If not, post back and I have some other ideas....

[Niklas5E1E]

heyo, meanwhile I rendered all subnests but the problem is still the same... everything is rendered (covered in green in timeline) and in 25fps but the export mp4 file is still in 30fps. Any other ideas? 😕
greets niklas

[Ann Bens · Accepted solution]

Set sequence and export to 48 kHz.

Turn off max render and hardware encoding and try again.

[Niklas5E1E]

Thanks Ann - that worked!! 🙂