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!
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The XHTML
You can set up your XHTML any way you'd like.
How do you get a transparent background?
Is it possible to build waveform image using
offlineAudioContext? Seems like the exact tool for the job.