Problems editing and exporting slow motion footage shot on iPhone

[beahaxby]

I'm editing a combination of slow motion and realtime footage shot on iPhone in Premiere Pro. The playback is fine in Premiere but when exported its very choppy in most parts.

In the link below I have attached a folder with footage of:

- playback in Premiere Pro (fine)

- playback of exported footage on my Mac (bad)

- playback of exported footage on my iPhone (bad)

https://drive.google.com/drive/folders/1UaV1AFtBKFJKDnnQHw9fQSkV2OQMkQkC?usp=share_link

The footage you're looking at I exported with these options:  

• h.264
• 240 framerate
• adaptive lowbitrate

I have experimented with a few other export methods but it still persists. I've also tried duplicating the sequence and re-exporting it but that doesn't work. Please let me know what I can do to have it export how it plays back in Premiere.

[Peru Bob]

Please use the free MediaInfo and post a screenshot of the properties of your original iPhone media in tree view:
https://mediaarea.net/en/MediaInfo

Many users are having issues with VFR. If the file is variable frame rate, use Handbrake to convert to constant frame rate before importing into Premiere Pro:
https://handbrake.fr/downloads.php
Here is a tutorial:
https://www.youtube.com/watch?time_continue=34&v=xlvxgVREX-Y

Shutter Encoder may also be used to convert to Constant Frame Rate:
https://www.shutterencoder.com/en/

[beahaxby]

Hey thanks for your reply.

With MediaInfo: When I started looking at which videos play back weirdly in the export and which I should drag to MediaInfo, I realised there was no continuity about which videos were performing badly. For example, one video clip slowed down would perform badly but play back normally at its regular speed in the export. And then another video clip that was played at its normal speed would play back badly. 

Thanks for the Handbrake tip - is it possible that I can relink media once I've re-exported it with the right framerate isntead of re-editing the whole thing again?

Thank you

[R Neil Haugen]

As iPhones, like nearly all phones, shoot VFR, it's best if any problems occur to convert using HandBrake or ShutterEncoder, then replace the media in Premiere with the converted clips.

Sometimes, some VFR clips work ok,  while others go bonk. Converting to CFR fixes the problem. And on any large or time-sensitive project, doing so before even starting in Premiere is a timesaver.

[Carlos37084936lhty]

I understand that you’re experiencing issues with exporting your slow-motion videos shot on an iPhone and edited in Premiere Pro. Here are some steps you can follow to troubleshoot the problem:

1. Review Export Settings:

   • Ensure that your export settings match the sequence and original footage settings. Using a 240 framerate may not be compatible with all playback devices.

2. Optimize Files:

   • Try using the render and replace function in Premiere Pro to optimize your clips before exporting.

3. Update Software:

   • Verify that you’re using the latest version of Premiere Pro, as updates often include performance improvements and bug fixes.

4. Seek Technical Support:

   • If the issue persists after following these steps, consider reaching out to Adobe’s technical support for more specialized assistance.