Trim Long Video on iPhone
You can trim videos on iPhone directly with the built-in trim feature on iPhone. Open the Camera or Photos app on iPhone, find and play the video you like to trim, tap the screen to display the controls. Drag inward either end of the frame viewer at the top timeline, you should see the yellow Trim button, then tap Trim to shorten the video clip to the portion you want. Note: 1). you can drag the ends of the video on either end until it is the length you desire; 2). you will have an option to trim original video or save as a new video clip.
However a problem occurs when trimming long iPhone videos, you have no idea how long exactly is the selected video before trimming. For example, in order to trim a 20 minutes video to 5 minutes on iPhone, you have to estimate the length of it before you go to actually cut the video. You can not specify the exact start and end time of the video fragment to cut.
Here we recommend a video editor for iOS, Video Slimmer, which you can use as iPhone video trimmer to get more precision when trimming long iPhone videos. You can get any portion of a long video on iPhone, plus it saves a lot of iPhone space.
Trimming long iPhone videos with Video Slimmer
Step 1. Add iPhone videos to the Video Editor
Step 2. Tap on the Video to Bring up the Trim Video
Step 3. Hold your finger down on the slider to drag to the start point.
You will see the exact timing and the frame of the video you have selected. Press the Set Start button to confirm your selection.
Step 4. Hold your finger down on the slider to drag to the end point.
You will see the exact timing and the frame of the video fragment you have selected. Press the Set End button to confirm your selection.
Now the selected video section will be highlighted in green, the rest of the video will be grayed out. You can see the exact start and end time in seconds, we have selected from 00:17 to 01:57 in this demo.
Click the Done button on the top right corner to save and exit the selection.
Step 5. Tap Slim Now! button to trim your video on iPhone
Now you know how to split long videos on iPhone. But what to do if I want to keep the full video length but reduce the width and height of the captured videos on iPhone? Check out this guide: How to Trim iPhone video size/dimensions?