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How to Change Video Speed on iPhone? (Slow / Fast Motion)
Video Editing

How to Change Video Speed on iPhone? (Slow / Fast Motion)

May 10, 2024 · 3 minutes read
How to Change Video Speed on iPhone? (Slow / Fast Motion)

These days, changing video speed is a popular way to give your videos a different feel.

You can make your videos play in slow motion or fast motion, either for the whole video or just certain parts. And the results can be pretty cool (or hilarious, I might add 😂).

Source: YouTube

All you need is the right tool to do it.

In this article, we'll show you how to adjust video speed using YouCam Video.

In this article

How to Change the Speed of a Video? [iPhone]

With a professional video editing app, adjusting the speed of a video can be quite straightforward.

For instance, consider YouCam Video. It provides options for both fast and slow motion. You simply need to use an intuitive slider to control the video speed, which ranges from 0.12x to 5.0x.

change video speed online

You can find YouCam Video on the Apple Store and download it from there.

With a 4.8 rating on the App Store, YouCam Video is a professional video editing app, especially for creating selfie videos.

In later sections, we will walk you through how to convert your video to slow motion and speed up your video.

Step-by-Step Guide: Convert Video to Slomo 🐢

Step 1: Import Your Video

change the speed of video

Step 2: Start Editing Your Video

change the speed of video

To slow down a video, tap on "Edit" and select "Speed". You can convert a video to slow motion at speeds as low as 0.12x.

Another method to slow down a video is to split it into several parts. Choose a clip and decide how slow you want the scene to be.

change the speed of video

This method allows for a more natural result with different speeds throughout the video.


Step 3: Preview to check the result

When you slow down a video, the frame rate might decrease, causing the video to appear choppy or less smooth.

Therefore, it's important to always preview your video to check if the result meets your expectations.


[Note] Why slowing down video might change the video quality?

Slowing down a video can also magnify any imperfections in the footage, such as pixelation or blurring.

This is especially noticeable if the original video quality is not very high to begin with. When stretched out, these imperfections become more apparent, resulting in a decrease in overall video quality.


Step-by-Step Guide: Increase Video Speed 🐇

Changing video speed to fast motion is very similar to the slomo process.

Here’s how it goes:

  • Step 1: Tap on “Edit” and choose “Speed” to change video speed
  • Step 2: Choose one clip and decide how fast you want to make a scene You can speed up a scene to 5.0x max in YouCam Video
  • Step 3: Preview to check the result



[Note] Things to know when speeding up video

When increasing video speed, you should also pay attention to these details:

1️⃣ The loss of video quality

This can manifest as pixelation, blurring, or a decrease in overall clarity. Additionally, rapid movements in the video may appear unnaturally fast or jittery, which can detract from the viewing experience.

It's important to consider these potential drawbacks when adjusting the speed of a video.

2️⃣ The distortion of audio synchronization

When you accelerate the video, the accompanying audio may become out of sync with the visuals, resulting in a mismatch between what is seen and heard.

This can significantly degrade the viewing experience and make the video less enjoyable to watch.

🤔 FAQs about Changing Video Speed

How can I change the speed of a video?

If you want to change the speed of a video, a straight-forward option is to use a video editing app (or tool) to help you out.

Take YouCam Video as an example, here's how to change the speed of a video:

  • Import your video
  • Tap on “Edit” and choose “Speed” to change video speed
  • You can split the footage to several clips, and decide how fast or slow you want to make a scene
  • Preview to check the result

If you're using a different video editing software, the process might be slightly different, but most will have similar features for adjusting the speed of a video clip.

How can I edit a video at 1.5 speed?

Editing a video at 1.5x speed is quite simple with the help of a video editing app.

This is what you can do when using YouCam Video to speed up your video:

  • Import your video into YouCam Video.
  • Right-click on the video clip in the timeline.
  • Choose "Edit" and tap  "Speed" from the menu.
  • In the slider that appears below, change the speed percentage to 1.5x. This will increase the speed of the video to 1.5 times its original speed.
  • Click "OK" to apply the changes.
  • Preview the video to ensure it looks how you want it.
  • Finally, export the video with your desired settings.

Which tool is used to adjust video speed?

The tool that people commonly use to adjust video speed is a video editing app or online tool. It really depends on which device you are using, or which one you prefer.

These tools usually provide a range of features for editing videos, including adjusting playback speed. More advanced speed control features are like speed ramp, speed curves, slow motion effects, and timelapse.

Some popular video editing apps include:

  • YouCam Video
  • Video Speed Changer
  • Video Speed: Fast & Slow Motion
  • Slow Fast Slow - Control the Speed of Your Videos
  • iMovie
  • VivaVideo - Video Editor & Maker
  • Filmora
  • KineMaster
  • InShot
  • CapCut
  • Videoleap
  • Videoshop

👉Read detailed review here: 12 Free Apps to Speed Up Your Video [2024 Editor’s Picks]

How to change the speed of time lapse on iPhone?

To change the speed of a time-lapse video on an iPhone, you can follow these steps:

  • Open the Time-Lapse Video:
  • Go to your iPhone's Camera Roll and locate the time-lapse video you want to edit.

  • Edit the Time-Lapse:
  • Tap on the time-lapse video to open it. Then, tap the "Edit" button, which looks like three sliders at the bottom of the screen.

  • Adjust Speed:
  • Once you're in editing mode, you should see a speed adjustment slider somewhere on the screen.

    Drag the slider to the left to decrease the speed (slowing down the time-lapse) or to the right to increase the speed (speeding up the time-lapse).

    Some versions of iOS may have a "Speed" option that you can select to change the speed.

  • Preview and Save:
  • After adjusting the speed, preview the time-lapse video to ensure it looks how you want it.

    If it does, tap "Done" to save your changes.

  • Save the Edited Time-Lapse:
  • Once you're satisfied with the speed adjustment, tap "Save" or "Save as New Clip" to save the edited time-lapse video to your Camera Roll.

    If your iPhone's version of iOS doesn't provide the option to adjust the speed of time-lapse videos directly in the Camera Roll, you may need to use a third-party app from the App Store to achieve this functionality.

    There are several video editing apps available that offer speed adjustment features for time-lapse videos.

change video speed online

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