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perf: retain Cast codecs across sequential VOD segments

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Valdemar Høgsvig Lorenzen
2026-10-17 00:56:20 +02:00
parent caa10c063f
commit 599c1492ee
4 changed files with 182 additions and 36 deletions
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TODO.md
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@@ -6,7 +6,8 @@
- [ ] evaluate playback optimization opportunities for YouTube and Miruro — measure benefits before changing behavior
- [x] coalesce superseded, not-yet-started seeks in the player and Cast controls; preserve accumulated relative skips and play/pause ordering
- [x] expand Cast H.264/AAC remux coverage with keyframe-aligned segments; preserve seek accuracy, timestamps and receiver compatibility
- [ ] reuse decoder/encoder state during sequential Cast playback; reset on random seeks and preserve independent keyframes and AAC continuity
- [x] reuse decoder/encoder state during sequential Cast playback; reset on random seeks and preserve independent keyframes and AAC continuity
- `.build/cast-media-check --codec-work`: 60s of 720p/30 B-frame video plus 44.1kHz PCM→AAC over loopback HTTP; three paired runs reduced median relay CPU from 3.56s to 2.58s (27%) and generation time from 4.97s to 4.43s (11%); physical-receiver playback still needs manual verification
- [ ] evaluate VideoToolbox hardware video decoding for native and Cast playback; retain software fallback for unsupported formats
- [ ] benchmark cold start, cached/uncached seeks and sustained playback separately to prioritize the actual bottlenecks
- do not enable Miruro HTTP persistence without preserving origin/header checks, or increase caches/shorten Cast segments without measuring the memory/request/codec tradeoffs