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!
![9 Mind-Blowing Canvas Demos]()
The <canvas> element has been a revelation for the visual experts among our ranks. Canvas provides the means for incredible and efficient animations with the added bonus of no Flash; these developers can flash their awesome JavaScript skills instead. Here are nine unbelievable canvas demos that...
![5 Ways that CSS and JavaScript Interact That You May Not Know About]()
CSS and JavaScript: the lines seemingly get blurred by each browser release. They have always done a very different job but in the end they are both front-end technologies so they need do need to work closely. We have our .js files and our .css, but...
![Assign Anchor IDs Using MooTools 1.2]()
One of my favorite uses of the MooTools JavaScript library is the SmoothScroll plugin. I use it on my website, my employer's website, and on many customer websites. The best part about the plugin is that it's so easy to implement.
I recently ran...
![Translate Content with the Google Translate API and JavaScript]()
Note: For this tutorial, I'm using version1 of the Google Translate API. A newer REST-based version is available.
In an ideal world, all websites would have a feature that allowed the user to translate a website into their native language (or even more ideally, translation would be...
How do you get a transparent background?
Is it possible to build waveform image using
offlineAudioContext? Seems like the exact tool for the job.