Got the movie working in the gallery

readme.md

@@ -131,6 +131,23 @@ cargo run --release -p resolved-cli -- render \
 `scripts/serve-gallery.py` serves the result as a web page on port 8000 of
 every interface, each scene captioned from its file.
 
+`crates/resolved-showcase` makes a 30-second movie at lighting L1: an inspector
+holding station behind a Landsat 8 model 705 km up, which astrokit propagates
+with J2. Time runs fast over the daylit Earth, slows as the Moon rises over the
+limb ahead, and slows almost to real time as the spacecraft passes into Earth's
+shadow. The camera drifts on a small natural relative orbit around its station,
+and adjusts its exposure frame by frame as a video camera does (up to one
+frame's time), through dawn and dusk. `--out movie.mp4` encodes it with ffmpeg,
+rendering each 1920 x 1080 frame in about 4 ms on the RTX 3060. `--serve
+0.0.0.0:8010` renders it live, in step with the clock, and streams it as MJPEG
+at 60 frames per second (`--fps`; it keeps up to 120, rendering each frame in
+under 5 ms) to the gallery page's Movie tab, which also plays and offers the
+recorded file (`make-gallery.sh` writes `gallery/movie.mp4`):
+
+```sh
+cargo run --release -p resolved-showcase -- --serve 0.0.0.0:8010
+```
+
 - `--out` writes raw DN as a 16-bit PNG, shifted up to fill 16 bits as
   cameras usually store them: a 12-bit DN is the stored value divided by 16.
   It is linear, so it looks dark next to the preview.