Change the Slow Motion Video Recording Speed on iPhone by Adjusting FPS
All new iPhone models can capture and record high quality slow-motion video by flipping to the ‘slo-mo’ setting in Camera app. Perhaps lesser known is that you can change the Frames Per Second (FPS) capture speed for slow motion video, which basically determines just how smooth and slow the video playback is, but also has a more practical benefit for casual users that reduces the movies file size, which we’ll discus momentarily.
How to Change Slow Motion Video Recording Speed to 240 FPS or 120 FPS on iPhone Camera
First, let’s show how to switch the FPS recording speed for Slow-Motion video capture in iOS, you can pick between either 240 FPS or 120 FPS:
- Open the Settings app and go to “Photos & Camera” settings
- Go to the Camera section and tap on “Record Slow-mo”
- Change the recording speed to 720p at 240fps, or 1080p at 120fps by tapping your choice
Return to the Camera app and you’ll find Slow Motion recording has changed to the setting you chose on the iPhone settings.
In some prior versions of iOS, slow motion recording speed was controlled within the Camera app itself as follows:
- Open Camera app and go to the “Slo-Mo” section as usual
- Tap on the “240 FPS” (or 120 FPS) text to toggle between 240 or 120 frames per second recording setting
- Record the slow-motion video as usual, whatever FPS number is shown will determine the recording speed of the video
Many users aren’t aware that the FPS text shown in the corner is actually a button toggle, since there’s really not much of an indicator that it’s selectable. Then Apple changed the setting to be within Settings app rather than the Camera itself, it varies per iOS version. If you don’t find it in one location, it’s the other.
Generally speaking, the best slow motion videos are recorded at 240 FPS*, since it’s literally double the number of frames, and thus produces a slower and smoother movie. So why would you want to toggle the setting if 240 FPS is almost always better? Hardcore video editors will have a variety of reasons, but for most casual users the primary determining factor for using 240 or 120 FPS is simply a matter of storage requirements for the iPhone (or iPad), since the higher frame rate video recordings will take up considerably more storage space on an iOS device.
For simpler slow-motion recording and sharing, the lower FPS videos also will require less compression, so if you’re sharing them to social networks or uploading them directly from your iPhone to YouTube or Instagram, you’ll discover that the resulting video could have less artifacts due to the smaller file size too. Ultimately if you want the highest quality 240 FPS full HD video, you’ll need to transfer those video files to your computer manually and not rely on uploading them to any service directly from the iPhone or iPad.
* Do note that the ability to toggle between 240 FPS and 120 FPS vieo recording is limited to the newest iPhone models, earlier models are either set at the lower frame rate recording speed, or, for particularly old iPhones, don’t support slow motion video capture at all. Nonetheless, all iPhones can capture slow motion video either with the native Camera app or by using a third party app as described here.