mirror of
https://github.com/jkdansereau/goldeneye-pc-port.git
synced 2026-10-23 15:52:42 +02:00
James Dansereau
452fa1025a
Linux reference-frame set for all 21 levels and the cross-platform golden rule (D521); golden tooling made non-destructive (D524); the gate pins a canonical in-tree save (D529) and the PRNG seed (D532); the capture tool's per-level re-pin bug fixed and the Linux set re-captured under the canonical save (D530, D531); no-arg verify.sh exits non-zero. README and docs visual/consolidation passes; the 15 MB preview gif replaced by stills. Refs: D521 D523 D524 D525 D526 D527 D528 D529 D530 D531 D532
79 lines
3.8 KiB
Markdown
79 lines
3.8 KiB
Markdown
# GitHub preview video — runbook
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The README embeds `docs/media/goldeneye-gh-preview.mp4` (the gif of the same
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name is too heavy for GitHub; keep it only if someone wants a local copy).
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It's a ~32 s, 8-clip montage of gameplay cut from ShadowPlay session
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recordings.
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## Tooling
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`scratchpad/` is gitignored, so `make-preview.py` is a **local** tool (it
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hardcodes local video paths anyway) — this doc is the tracked artifact. If it
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goes missing, the commands below describe exactly what to rebuild. Run with
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plain `python`.
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Working files (per-clip mp4s, concat list, palette, `state.json`) go to
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`scratchpad/.preview-work/` — disposable, safe to wipe (but then re-run
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`build` after any edit).
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```sh
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python scratchpad/make-preview.py list # montage index -> source session + time
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python scratchpad/make-preview.py shift <i> <±sec> # nudge a clip within its source video
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python scratchpad/make-preview.py set <i> <sec> # absolute source time
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python scratchpad/make-preview.py replace <i> <.10|.12|.18|.19> # new random spot in a session
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python scratchpad/make-preview.py regen --seed N # full random redo (same clips/lengths)
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python scratchpad/make-preview.py build # re-concat + re-render from state.json
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```
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Every edit command rebuilds mp4 + gif automatically. A full rebuild takes
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~30–50 s; a single-clip shift is the same cost (concat dominates). Budget
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one command per step if running under a timeout — cut+concat and the two gif
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passes together fit in ~55 s.
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## Source material
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`<videos>\NVIDIA\Build-pc\new\` — ShadowPlay recordings
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(3072x1728 @ 60 fps, h264), no usable audio track (cut with `-an`). The four
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sessions and their tags are hardcoded in `SESSIONS` at the top of the script;
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add a new session there (tag, filename suffix, duration) to use it.
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## Rules learned from review rounds
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- **Never start a clip in the first ~60 s** of a session: desktop / boot /
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menus. (`MIN_START`)
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- **Bad zones** — source times that show non-gameplay; random picks avoid
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them and `replace` should too. Currently known (in `BAD_ZONES`):
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- `.10` @ ~395–425 s: file-select menu
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- `.10` @ ~1290–1420 s: watch close-up (appears twice in that session)
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Add new ones here whenever a review round finds another.
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- **Clip length** 4 s is the sweet spot; 5 s starts to drag, <3 s flickers.
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- **Same-session spacing**: two clips from one session ≥90 s apart, or they
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read as a repeat of the same scene.
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- When told "roll forward/back ~N seconds", use N ± a few s and prefer a
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high-motion moment in that window if you have keyframe stats (see below);
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otherwise a flat offset is fine.
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- If a pick lands on a menu/loading screen, step it forward again rather
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than picking a new random time — the user's "a bit later/earlier" almost
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always means the *same* scene, different part.
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## Output spec (don't change casually)
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- mp4: 1920x1080 @ 30 fps, libx264 crf 20, `+faststart`, no audio. ~25 MB for 32 s.
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- gif: 512 px wide, 12 fps, two-pass palette (`palettegen` then
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`paletteuse=dither=bayer:bayer_scale=3`). ~28 MB — local use only.
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## Optional: motion data to find "cool" moments
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`scratchpad/analyze-sessions.py` dumps per-keyframe YAVG stats for the
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session files; the diff between consecutive keyframes is a decent proxy for
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"something is happening". If you need to find the coolest moment in a time
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window, maximize it — but note plain random picks with spacing constraints
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have been preferred by the reviewer over signal-optimized cuts, so use this
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only when asked for "something cool".
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## ffmpeg notes (Windows)
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No system ffmpeg; the script falls back to the `imageio-ffmpeg` static
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binary (`pip install imageio-ffmpeg`). Pass paths as forward-slash or bare
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filenames with `cwd=` set — drive-letter colons and backslashes break
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filter-graph argument parsing.
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