LayoutTests/media/media-source/content/test-vorbis-manifest.json

{
    "url": "content/test-vorbis.webm",
    "type": "audio/webm; codecs=\"vorbis\"",
    "init": { "offset": 0, "size": 3744 },
    "duration": 1.33,
    "media": [
        { "offset": 3744, "size": 9992, "timestamp": 0, "duration": 1.33 }
    ]
}