[christianfurr]

At roughly 30 rendered FPS, OoT's 60 FPS AV1 movies fell progressively behind their normally playing music and narration. The original 154.234-second Kokiri movie advanced 154.050 seconds of picture timestamps in 300.282 seconds of elapsed time.

Anchor a movie clock at the first accepted picture and discard late presentation images while continuing to decode every AV1 packet. Handle the one-picture output pool OoT actually registers, preserve client-acquired buffer ownership and sync generations, reset the clock on flush, and retain one discarded image so a separate empty EOF packet cannot lose the final picture. Audio timing, game/physics timing and frame-rate settings are unchanged.

The original front-left voice repair is already upstream in df1e321d, after my fork. This PR preserves that implementation and extends its REV15/REV16 regression to reorder active voice records between requests, change gain and stop one voice while inactive ID-zero records remain present.

Validation on Apple M4 / 16 GB, native OoT update 131072:

• Production queue code under AddressSanitizer and UndefinedBehaviorSanitizer: 19,577 checks, one/eight buffers, 24/30/60/120 FPS consumers, a 750 ms stall, EOF/final-image delivery, reset and held-buffer ownership.
• Disabled-sync comparison: 3,877 checks, reproducing about 3.103 seconds of accumulated lag for a three-second source at 30 FPS.
• GPU-enabled original opening, with mods and opening skip off: final trace advances 153.833 seconds of video in 153.844 seconds, maximum sampled drift 21.651 ms, then reaches the following 3D cutscene. This is timestamp progression sampled once per second, not a claim of zero output latency or 60 rendered FPS.
• Production audio renderer: 52,373 checks.
• A 28-second stereo capture overlap matches the independently decoded original title BWAV: correlation 0.999999842 left / 0.999999851 right, with unity gain and the source's natural balance. No balance compensation or mono conversion.
• Native build and installed app pass; ad-hoc bundle verification uses codesign --verify --deep --strict. Player saves and shader data are unchanged.

Verification notes and commands. No game-derived audio, video, screenshots, shaders or saves are included. iOS playback was not tested.

[ly05010419]

已保留作者提交并合入 main，已推送：2801fed7。

本机直接执行生产影片队列代码的 ASan/UBSan 回归通过：同步开启 19,577 项、关闭对照 3,877 项，覆盖 1/8 缓冲、24/30/60/120 Hz 和卡顿。没有重做完整影片游玩或 iOS 真机验收；PR 中的实际影片对齐结果仍归于作者测试。谢谢贡献。