"Is there a way to speed up Khan Academy videos by 1.2X, 1.5X, or 2X without sacrificing quality?"
Adjust the playback speed of a video, so that it becomes handy for you to speed through a long clip full of fluff, or review a scene in slow motion. But what are the ways to change video speed? To speed up or slow down the whole video, some free online tools and almost all player software can give you a leg up. But to control the speed of only a range of your footage, use video speed editors.
Compared with extremely professional non-linear video editors like Adobe Premiere Pro CC, VideoProc is much easier for beginners to use to change minor settings like video speed. At least the straightforward user interface ensures that there are no complexities to puzzle over. Free get a .exe or .dmg setup file through the above download button, then you can use it on Windows or macOS after the installment.
Step 1: Load your video
Click into "Video", then load your local video or videos through "+ Video" button. Dragging and dropping works too.
Step 2: Change video speed
Click "Option", switch to "Edit Video" and find "Audio & Video" in the lower part of the panel.
Drag the "Playback Speed" slider to the right to speed up video to up to 16x, or to the left to apply slow motion effect. "Force A/V Sync" works between 0.5x to 2x. Then "Done".
Step 3: Output video
Press button "RUN" to apply your video speed changes.
Step 1: Open Premiere Pro CC and create a new project through "File > New > Project" in the menu bar. Also Premiere Pro allows you to import files of Premiere Elements and After Effects.
Step 2: Name the project, browse to specify the output location, and adjust settings like renderer, display format of video/audio, capture format, etc.
Step 3: Create a new sequence, drag your video to the Timeline panel, right click the video clip and find "Speed/Duration" option.
Step 4: Input a number to manually change video playback speed. If the number is less than 100%, the video will be slowed down, while higher than 100, your video will be sped up. For example, 200% means the speed is changed to twice normal speed. Besides, you can speed up a video without changing during by clicking the gang button.
Step 1: Go to ezgif.com, choose "Video to GIF", and then switch to "Video Speed"
Step 2: Click "Choose File" button to load a video from your local drive and press "Upload video!" Note that the max file size is limited to 100MB. Our test of uploading a 90 MB video keeps buffering but fails at last. So if you are trying to speed up a 4K video or a large file in 1080p, don't use online speed controller. For your information, a 38-second 4K clip is about 192 MB. 4K video editor >
Step 3: Input your desired speed multiplier number. It seems that any number is OK there, like 200. But if you check the "change speed for sound" box, an alert message "Audio multiplier must be between 0.5 to 2!" will pop up.
Step 4: Push the button "Change video speed!" and that's it. Beware that changing video speed online in ezgif.com would degrade video. You will see a serious quality loss. And unfortunately, there are no settings to avoid that.
Step 1: Go to kapwing.com and click "Upload" to import your video clip. Note that Kapwing only supports videos in .mp4, .mov, .webm, .ogg and .mpeg file formats. If you are going to change the playback speed of a video in formats like MKV, WMV, AVI, ProRes, etc, use video speed editors or other player software.
Step 2: Change video speed. There are seven video speed options ranging from 0.25x to 4x. Then click "CREATE!"
Step 3: Click "Download" button to save your video with speed settings. Note that there will be a watermark in all videos you processed in Kapwing. To remove watermark, $6 is required for one clip and $200 per year.
Step 1: Click "Media" > "Open File" and then load your video to play. Note that VLC does not natively support HEVC. Download and install a H.265 codec pack may help you solve "VLC can't play HEVC video" error.
Step 2: Click "Playback" in the menu bar, move down to "Speed" and you can adjust video speed there. 4 options are available to choose: Faster (fine), Faster, Slower (fine), Slower.
Step 1: Open your video clip with "Movies & TV" app on Windows 10.
Step 2: Click the pencil button at the bottom and select "Create slow motion video". You can only slow down video in Windows 10 Photos, between "Slower" and "Super slow". As you can see, there is no "speed up" option.
Step 1: Open video in QuickTime player and find "Show A/V Controls" under "Window" tab.
Step 2: In the Playback area, you can change video playback speed from 1/2x to 3x.
Jordi was an amateur tech enthusiast, but now an editor who has published hundreds of stories covering hardware acceleration, video editing, software review and how-to guides. He is more like a "tech support" with adventurous soul, eagerly grabbing cutting-edge video technologies off in a professional yet easy-to-understand style, and enjoying gliding, diving, etc.
Aiming to be the leading digital media company, Digiarty Software, Inc. is dedicated to providing professional and innovative multimedia software for all Windows and Mac users.