![]() ![]() ![]() WebM videos are much smaller than MP4 videos, but not all browsers support WebM so it makes sense to generate both. While MP4 has been around since 1999, WebM is a relatively new file format initially released in 2010. If the input GIF has odd dimensions you can include a crop filter to avoid FFmpeg throwing a 'height/width not divisible by 2' error: ffmpeg -i my-animation.gif -vf "crop=trunc(iw/2)*2:trunc(ih/2)*2" -b:v 0 -crf 25 -f mp4 -vcodec libx264 -pix_fmt yuv420p my-animation.mp4 Create WebM videos # The libx264 encoder only works with files that have even dimensions, like 320px by 240px. This tells FFmpeg to take my-animation.gif as the input, signified by the -i flag, and to convert it to a video called my-animation.mp4. To use FFmpeg to convert the GIF, my-animation.gif to an MP4 video, run the following command in your console: ffmpeg -i my-animation.gif -b:v 0 -crf 25 -f mp4 -vcodec libx264 -pix_fmt yuv420p my-animation.mp4 There are a number of ways to convert GIFs to video, FFmpeg is the tool used in this guide. If you have any GIFs that can be converted, you should see a suggestion to "Use video formats for animated content": Create MPEG videos # Then run Lighthouse and check the report. ![]() In DevTools, click on the Audits tab and check the Performance checkbox. Use Lighthouse to check your site for GIFs that can be converted to videos. Thankfully, this is one of those areas of loading performance where you can do relatively little work to realize huge gains! By converting large GIFs to videos, you can save big on users' bandwidth. Have you ever seen an animated GIF on a service like Imgur or Gfycat, inspected it in your dev tools, only to find out that GIF was really a video? There's a good reason for that. ![]() Effect on Largest Contentful Paint (LCP).In addition to converting, you can also trim, combine, crop, and resize your videos, as well as add music, text, animations, and transitions to them. These file formats will be converted to mp4 for ease of use and transfer. You'll see these conversions happen in real time for files like FLVs, WAVs, WMVs, AVIs, and more. Uploading various file types that are not natively playable in the browser will trigger a conversion on upload. Video file types like FLV, WEBM, and AVI don't always play correctly on all devices, and with Kapwing these files can be easily converted to a more widely accessible container format like MP4. When sharing your content, you want to make sure your files are in a format that is universally accepted and reliable. Once you have made your selection, simply press the Export button at the bottom to create your newly converted video. The options are MP3 for saving the audio from videos with music, JPEG for saving a specific screenshot image from the video, GIF for short animated images clipped from the video, and MP4 for converting MOV, FLV, AVI, and other video files, or saving videos from the web straight to your files. Then, a new sidebar will pop out that will list your export options. When your video is uploaded to Kapwing, you can make any edits to your video, or you can go straight to conversion by clicking Export Project on the right sidebar. ![]()
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