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!
![CSS 3D Folding Animation]()
Google Plus provides loads of inspiration for front-end developers, especially when it comes to the CSS and JavaScript wonders they create. Last year I duplicated their incredible PhotoStack effect with both MooTools and pure CSS; this time I'm going to duplicate...
![Regular Expressions for the Rest of Us]()
Sooner or later you'll run across a regular expression. With their cryptic syntax, confusing documentation and massive learning curve, most developers settle for copying and pasting them from StackOverflow and hoping they work. But what if you could decode regular expressions and harness their power? In...
![Create a Simple Dojo Accordion]()
Let's be honest: even though we all giggle about how cheap of a thrill JavaScript accordions have become on the web, they remain an effective, useful widget. Lots of content, small amount of space. Dojo's Dijit library provides an incredibly simply method by which you can...
![Redacted Font]()
Back when I created client websites, one of the many things that frustrated me was the initial design handoff. It would always go like this:
Work hard to incorporate client's ideas, dream up awesome design.
Create said design, using Lorem Ipsum text
Send initial design concept to the client...
How do you get a transparent background?
Is it possible to build waveform image using
offlineAudioContext? Seems like the exact tool for the job.