gecko-dev/content/media/test/manifest.js

// These are small test files, good for just seeing if something loads
var gSmallTests = [
  { name:"r11025_s16_c1.wav", type:"audio/x-wav", duration:1.0 },
  { name:"320x240.ogv", type:"video/ogg", width:320, height:240 },
  { name:"bogus.duh", type:"bogus/duh" }
];