Audio Visualizer : Surgery

I needed some audio visualizer to present the actual waveform for my music videos. As I am not using a professional video editor which is capable with this kind of plugins, I did not find any simple and easy to use solution to have a little waveform like display.

So I decided to code my own to export as a video, which I can overlay on the cover with my video editor.

This is a 360 x 64 example.

This audio visualizer is called Surgery, because it looks a bit like a oscilliscope in a hospital. Maybe I am going to code some others.

Requirements

• Processing Java Version
• Processing Sound Library
• Processing Video Export Library
• FFMPEG

Instructions and notes

• Use the configuration as below.
• Hit ESC or close the window to stop.
• It will autostop when the soundFile ended, but it will run as long the history waveform is nulled. This extra space leaves some room for smoother video editing.

Configuration

In this program you can configure some options to influence the video produced and to be auto-saved.

The code has at the beginning a configuration section. The options are described below and summarized in the code itself. Default values are included.

• renderSize
  To specify the render size set the resolution in the setup() method. For HD I use 1280 x 64 and set it in the size() method like below. You can use any height, but a smaller stripe looks better. Unfortunately this can not be a variable like the others due to Processing limitation.
  size(1280, 64);

• fps
  How many frames per second does your video have? 30 fps looks smooth, but you can also use more like 60 or 120.

• soundFile
  Filename of the sound file from which the waveform should be displayed. For simple access, place in the data directory and give a name like "data/song.wav".

• videoFile
  Filename of the the video file to be exported. It should be written into the data directory an look like "data/export.mp4".

• margin
  Keep a margin from top and bottom of the rendered lines.

• antiAlias
  When drawing the lines, they are smoothed by antiAlias value. 2 would affect a 2x2 blurring.

• doMask
  When the cursor ran from left to right, a mask is applied, when doMask is true. To disable use false.

• colorMask
  When the cursor ran from left to right, this mask value is evaluated when doMask is true. It can be used to apply a color filter. It is applied to RRGGBBAA where R=red, G=green, B=blue, A=alpha and every value is hex coded.

• doBlur
  When the cursor ran from left to right, a blur is applied with the strength of blurStrength. This is only applied if the value is true. To disable set to false.

• blurStrength
  Blur is applied, when the cursor ran from left to right and doBlur is true. The entire window will be smoothed by this blurStrength value. 2 would affect a 2x2 blurring.

• drawCursor
  A line cursor will be drawn to show current position, only if the value is true. To disable set to false.

• cursorColor
  Color of the line cursor. Will only be drawn if drawCursor is true.

• lineColor
  Color of the waveform.

• backgroundColor
  Color of the background.