How to fix Variable Frame Rate with h.264 video

[Adrian5C60]

Hello all. I have googled and searched the Adobe site but can't find the right answer. I shot at 24 fps using Filmic Pro on a iPhone 12. I locked the the shutter speed at 1/48 and also locked the ISO. When I imported the clip into Premiere Pro it shows as "Varibale Frame Rate Detected" under Media File Properties. I know smart phones all record video this way but I thought there was an option in Premiere Pro called "Presereve Audio Sync" that was supposed to fix it. I have opned the clip in the effects panel but I don't see the option anywhere. There is no MPEG Source settings option available as decribed when I search for a solution.

I am using Premiere Pro 2024 and working on a MacBook Pro OS Sonoma 14.6.

Thanks for any guidance or if I am missing the obvious.

[Ann Bens]

Premiere cannot handle vfr properly.

Presereve Audio Sync have not seen this in quite a few versions.

Convert either with Handbrake or Schutter Encoder before bringing it into Premiere. Do not use AME

HandBrake: Open Source Video Transcoder

Shutter Encoder encoding|converting video FREE PC|Mac

[Averdahl]

Is there something to fix now, is the video/audio out of sync?

Yes, one should avoid variable frame rate but many times it works without any issues. So if it works maybe there is nothing to fix.

Or, download Shutter Encoder and use the Conform option to conform the footage to a fixed frame rate.

...I thought there was an option in Premiere Pro called "Presereve Audio Sync" that was supposed to fix it.

By @Adrian5C60

[Peru Bob]

Here is a Handbrake tutorial:

https://www.youtube.com/watch?time_continue=34&v=xlvxgVREX-Y

[Hutch Harris]

+1 to @Peru Bob's mention of Handbrake. I've worked on multiple projects in the past where people sent in iPhone footage of themselves as the source material, all VFR. Some of the clips worked without issue, other clips would have sync issues on the timeline, some only in export, and some would just crash the project on export. Not fun. We've made it standard now that all clips are batch transcoded through Handbrake to CFR before importing into a project. Based on the quality of our source material the 1080 Fast preset works for our delivery needs - but you may want to experiment with your quality settings if you are concerned about that. These are almost definitely overkill, but my recommendation for specs to preserve quality would be 1080 @ 15,000kbps, or 4K @45,000kbps.

Last thought, its an old thread, but you may find this helpful: https://community.adobe.com/t5/premiere-pro-discussions/setting-constant-frame-rate-in-filmic-pro/td...