4K iPhone 8 footage lagging in Premiere

[SpiderCircle]

I have a 5 minute 4K clip shot on an iPhone that I'm desparately trying to make work in Premiere.  During playback, the clip is fine till a certain point then it cuts to being off sync with the audio.  I've tried transcoding with AME using different presets and nothing works.  The best preset I've used so far is High Quality 4K but lags near the end. 

I read on a previous thread that Handbrake would solve the issue however, Handbrake does not have any 4K options.  Am I missing something?  There any way for the clip to play and edit smoothly in Premiere?  Any suggestions are helpful.  Thanks!

[Ann Bens]

There is no point in using AME to convert footage you are having problems with.

Use HandBrake to convert and make sure it is set to constant framerate.

Dont use a preset set it manuallly to 4K

[Guest]

This is why: https://www.reddit.com/r/VideoEditing/wiki/faq/vfr

This is a request to make Premiere better: https://adobe-video.uservoice.com/forums/911233-premiere-pro/suggestions/38441842-fix-vfr-performanc...

[Media Editor]

Ann Bens stated:  "Don't use a preset set it manuallly to 4K."   I use Handbrake and do not know how to set it manually to  4K.

[Ann Bens]

If I ingest a UDH clip it outputs as UDH no preset selected. However there is one under Web and Device

You cannot uprez a 1080p to UDH only downrez.

You can adjust under Dimensions