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Sustained download

Five minutes at 1080p in a single progressive file. Short clips finish inside the initial congestion window and tell you nothing about steady-state throughput; this one does not.

Switching rendition keeps the current position and the paused state, so the same frame can be compared across the ladder.

Direct URLs

/media/sustained/sustained-1080p.mp4

Technical detail

Identifier	`sustained`
Frame rate	30 fps, constant
Duration	300 s
Video	H.264 High, yuv420p, closed GOP of 60
Audio	AAC-LC 48 kHz stereo, 440 Hz reference tone
Container	MP4 with `faststart`; moov before mdat
Intended for	throughput, cache fill, range requests
Checksums	SHA256SUMS

Other streams

Timecode and colour bars
Smooth gradients
High motion, 60 fps