Lagging Video in preview

[Naomi5DF4]

Hello, I was wondering if anyone would be able to help me!

I've shot a load of film on my phone that I am now editing. I created some stop motion animtion clips through an app which play fine in the preview screen but when I try to play the videos shot on my phone camera they are super laggy. They play normally when I open them in quicktime so I don't know what I am doing wrong 😞 I've tried most of the YouTube tutorials telling me to reserve RAM, dropping playback resoultion, rendering the video etc but nothing has worked so far!

It's for a university project so any help is appricated, thank you!

[RobShultz]

If it's shot on your phone there is a good chance that it has a variable frame rate. Although it seems odd that this would cause lagginess but I would recommend downloading the free HandBrake app and converting the video to a fixed frame rate and see if the converted video plays better.

Hope that this helps.

[Naomi5DF4]

Thank you for replying, I just tried what you suggested and it didn't work! I just tried rendering the clip to see if that would make it better and it said it was rendering 76 frames I don't know if that makes a difference, but it seems quite low!

[Naomi5DF4]

Also when I double click on the clip and it appears on the left hand side it plays fine there

[Peru Bob]

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

Also:

What are the complete computer specs, including hard drives (how many, what kind, what is on each, and how full)?

[Naomi5DF4 · Accepted solution]

Thank you for your suggestions but I think I have worked it out! I dragged the video taken off my camera into a new project first instead of the stop motion animation, it must have determined a different frame rate!