To create a poster image at a specific time instead of at the beginning of the video, add -ss parameter with value in seconds ffmpeg -ss 1.4 -i video.mp4 -frames:v 1 video-poster. ffmpeg will also handle image conversion.
The last parameter is the output file name video-poster.png. :v is a Stream specifier to tell ffmpeg that we are working with a video file. -frames:v 1 stops working after the 1st frame (because we need only 1 frame). 
This will create a PNG image that has the same width and height of the video file.
ffmpeg -i video.mp4 -frames:v 1 video-poster.png When the video file finishes loading and starts playing, there will be a smooth transition from the poster image to the video.Ĭreating a poster image from an mp4 file can be done with ffmpeg command line tool. Step 3 Download your png-file Wait till your conversion process will be completed and click download converted png file. Step 2 Convert mp4 to png Select png or any other format, which you want to convert. I will use the first frame of the video file as a poster image. Step 1 Upload mp4-file Select mp4 file, which you want to convert, from your computer, Google Drive, Dropbox or drag and drop it on the page.
This gives a hint to the user that there’s some content there. The poster image will display while the video file is loading. I wanted a quick way to create a poster image from a video file (mp4) to use with poster attribute of the element.
Firefox: ’m working on a website that has a few short animations in elements on the page. For mobile platforms, you need the newer browsers - Chrome 103 and Safari 16 and later.įor JPEG XL current situation is tragic: no support on mobile platforms yet, the same for desktop, but can be enabled with special flag: Currently, not supported in MS Edge and IE(and will never be). Where these formats can be used?ĬanIuse says AVIF can be used in Chrome 85, Firefox 93 and Opera 81 and later. More encoding options are available: -b 700k -tile-columns 600 -tile-rows 800 - example for the bitrate and tales. $ ffmpeg -i image.png -c:v libaom-av1 -still-picture 1 image.avif Convert to JPEG XL $ ffmpeg -i image.png -c:v libjxl image.jxlĭistance: Butteraugli distance, lower is better, 0.0 - lossless, 15.0 - minimum quality.Įffort: higher is better, 7 is the best quality, 1 - the worst. Yeah, we need libaom 'cause AVIFF is part of AV1, the open video format. Then FFmpeg should be compiled with options -enable-libjxl and -enable-libaom. These libraries should be compiled and installed: This is an update to the previous post Best FFmpeg commandsįull support available since FFmpeg v5.1 LTS. 1 min read Photo by Sara Budhwani / Unsplash.
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