LayoutTests/media/media-source/content/test-vp9-long-manifest.json

{
	"url": "content/test-vp9-long.webm",
	"type": "video/webm; codecs=\"vp09.00.10.08\"",
	"init": { "offset": 0, "size": 524 },
	"duration": 10.006,
	"media": [ 
		{ "offset": 524, "size": 268592, "timestamp": 0, "duration": 5.006},
		{ "offset": 269116, "size": 277107, "timestamp": 5.007, "duration": 10.006}
	]
}