DASHing Into the Wild with VP9
summary
JW Player’s VP9 over DASH implementation claims ~50% bitrate savings at higher resolutions and uses libvpx/ffmpeg/WebM with Shaka and JW Player for MSE playback. Two‑pass encoding adds ~20% encode time but stabilizes rate control; CRF capped by target bitrate yields constrained VBR. A grid search across CRF/bitrate/params on thousands of encodes finds a sweet spot. Deploy uses HTTP byte‑range requests, edge caching, five representations (up to 1080p) and records 230,000 plays with 65% 1080p vs 28% HLS.
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chapters (6)
- 0:00Introduction and goals
- 1:21VP9 implementation strategy
- 7:56Performance metrics
- 8:55Architecture and results
- 13:52Live demo and analysis
- 17:21Q&A and closing
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