Speed up video or slow down also known as fast motion/slow-motion effects in video production, which makes the video clips play faster or slower than original speed. Usually, the slow-mo effect can give us a "close-up in time", and introducing a feeling of surreality, while speeding up video is used to make videos dramatic or funny. Also, you can speed up the video to playback all scenes and make the video shorter.
Part 1: How to Speed up & Slow Down Video Speed by Adjusting Speed [3 Steps]
Wondershare Filmora9 is such a video editor that we'd like to introduce to you whether you are using a Windows or a Mac computer, with this simple video editor, you can quickly speed up and slow down videos. Read on to see how to speed up or slow down your creativeness. Below is a video tutorial about how to add fast/slow motion video effects with Filmora9. You can download Filmora9 now and have a try.
Apart from the slow/fast motion video tutorial, you can also follow the steps about how to speed up and slow down videos below and make a slow-motion or fast-motion videos with Filmora9 easily.
1. Add video files to the Filmora9 video editor
Click Import on the media library and select the video files from your computer to add them into this program. Alternatively, you can simply drag and drop files to the User's Album. Wondershare Filmora9 supports almost all regular video formats, such as MP4, AVI, WMV, MOV, FLV, M4V, MPG, VOB, ASF, 3GP, 3G2, F4V, MPEG, TS, TRP, M2TS, MTS, TP, DAT, MKV, DV, MOD, NSV, TOD, EVO, etc.
2. One click to speed up or slow down
Next, drag videos from the User's Album to the video track on the Timeline, and then right click on it to click Speed and Duration. A pop-up window will appear. Speed numbers will indicate how fast or slow the motion effects will be. Then adjust the speed you want. You can view the effects in the preview window to make video faster or slower. If you think it is too much, 0.5 speed is a good choice.
0.5: half of the original speed (Slow Down, Half)
1: The original speed
2: Double the original speed (Speed Up, Double)
Other speed available to choose: 0.1 times, 0.2 times, 0.25 times, 0.33 times, 0.5 times, 2 times, 3 times, 4 times,5 times, 10 times etc.
Note: You can simply change the video speed by dragging the speed slider. To speed up the video to make a fast motion effect, drag the slider to the right. To slow down the video to make a slow motion effect, drag the speed slider to the left. You can always drag the slider to set to an optional video speed rate.
3. Adjust Audio Sound [Optional]
Whenever you speed up or slow down the video playback speed, the video audio speed will change accordingly. If you want to keep the original playback speed of the video audio, you can detach the audio from video first and then do some editing to make a perfect pitch to the video. You just need to double click the audio clip to edit in the audio edititing panel. You can edit fade in/out, remove background noise and more.
Besides, you can also add a new sound to the video to replace the original video audio, for the specific steps, check our guide about How to Replace Audio in Video.
4. Export fast/slow motion video
When you have finished adjusting the video speed, click Export. You can save video in any popular formats by clicking Format. If you want to play your new video creation on your iPod, iPhone, iPad, click Device and select the icon for your devices. You can also share your videos on YouTube and Vimeo directly or burn video to DVD disc.
Keep in mind that when you adjust the video speed to speed up video, there are some dos and don’ts that you should pay attention to. Our YouTube official channel has made a video about it, watch the video below and let’s know if it is useful for you when making a video faster or slower.
Part 2: Make Speed up & Fast Motion Video by Changing Video Duration
Filmora9 also allows you to adjust the duration of the video clip to change the video speed. After importing the video clip to the timeline, right click it and choose Speed and Duration to open the custom speed pop-up. Go to Duration section and you will see the original duration of the video. Adjusting the duration of the video longer will add a slow motion effect to the video. Changing the duration of the video to a shorter time will speed up the playback speed of the video. Just directly input the number in the field to speed up/slow down video.
Preview the video to check if it gets the best fast motion or slow motion effect and then save and export it.
Part 3: How to Speed up Video Online
If you want to speed up video online, Ezgif is an online tool that you can consider. You can import video from your PC or just paste a video URL. So easy to use. Below are the steps to change video speed.
Step 1: Open Ezgif, and then click import file button to upload your video. After it is done, click Upload video. Depending on the size of video, it may take for a while.
Step 2: After it is imported, a editing page will appear. You can adjust multiplier number. The bigger it is, the faster your will be. Tick the change speed for sound. Now, click Change video speed to start speeding up video.
Step 3: Save the video when finished. Click the three dots on video and then select download.
Note: the max file size is 100MB. It supports MP4, WebM, AVI, MPEG, FLV, MOV, 3GP and more. Plus, the importing speed is slow.
As you can see from here, if you want to have more options to change video speed and have a faster importing speed, online solution is not best for you.
Above are two ways of speeding up or slowing down a video playback speed, besides fast motion and slow motion video effects, you could also do some basic as well as advanced editing with Filmora9, such as rotating, reversing, chroma keying, etc., what's more, there are lots of preset video effects that you can use to give your video a hollywood look. If you want to know more features that Filmora9 provides, check this introduction video below.
In fact, except for Filmora9, many other video editing software can help you do this effect, professional tools like Adobe Premiere, Sony Vegas, Final Cut Pro. Just choose one and get started. Let us know your opinions in the comments section below.
Liza Brown is a writer and a lover of all things video.
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