Create a Waveform Image with ffmpeg
Waveform images have a variety of uses and I've started seeing waveform images overlaying at the bottom of videos. That type of feature seems useful if you want to see identify music in a video or specific spaces in a video which feature action. If you're creating an audio-centric app, you may have a dozen uses for the waveform image.
You can easily create a waveform image using the amazing ffmpeg utility with a very short command:
ffmpeg -i input -filter_complex "showwavespic=s=640x120" -frames:v 1 output.png
The image you'll get back will look similar to:
There are a variety of customizations you can create for waveform image as detailed in the ffmpeg waveform documentation. Take some time to experiment with all of the features provided by ffmpeg -- you can do amazing things with media!
![Chris Coyier’s Favorite CodePen Demos]()
David asked me if I'd be up for a guest post picking out some of my favorite Pens from CodePen. A daunting task! There are so many! I managed to pick a few though that have blown me away over the past few months. If you...
![Detect DOM Node Insertions with JavaScript and CSS Animations]()
I work with an awesome cast of developers at Mozilla, and one of them in Daniel Buchner. Daniel's shared with me an awesome strategy for detecting when nodes have been injected into a parent node without using the deprecated DOM Events API.
![jQuery Countdown Plugin]()
You've probably been to sites like RapidShare and MegaUpload that allow you to download files but make you wait a specified number of seconds before giving you the download link. I've created a similar script but my script allows you to animate the CSS font-size...
![Firefox Marketplace Animated Buttons]()
The Firefox Marketplace is an incredibly attractive, easy to use hub that promises to make finding and promoting awesome HTML5-powered web applications easy and convenient. While I don't work directly on the Marketplace, I am privy to the codebase (and so...
How do you get a transparent background?
Is it possible to build waveform image using
offlineAudioContext? Seems like the exact tool for the job.