Reel ends at the x-axis end; /vsync re-renders the reel

flake.nix

@@ -13,7 +13,7 @@
           default = matebot;
           matebot = pkgs.python3Packages.buildPythonApplication {
             pname = "matebot";
-            version = "0.3.0";
+            version = "0.3.1";
             pyproject = true;
             src = self;
             build-system = [ pkgs.python3Packages.hatchling ];

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "matebot"
-version = "0.3.0"
+version = "0.3.1"
 description = "The proactive companion for GaggiMate espresso machines: post-shot logging bot, .slog decoder, shot-journal site generator"
 readme = "README.md"
 license = "MIT"

src/matebot/__init__.py

@@ -1,3 +1,3 @@
 """matebot — the proactive companion for GaggiMate espresso machines."""
 
-__version__ = "0.3.0"
+__version__ = "0.3.1"

src/matebot/commands.py

@@ -268,6 +268,18 @@ async def _cmd_vsync(self) -> None:
             f"🎬 Shot #{shot} video offset: {current:+.2f}s → {current + delta:+.2f}s. "
             "Journal updates on the next sync."
         )
+        try:
+            from .render import RenderError, render_reel
+
+            reel = await render_reel(self.config.data_repo, shot, title=f"Shot #{shot}")
+            try:
+                await self.messenger.send_video(
+                    reel.read_bytes(), f"🎬 Shot #{shot} @ {current + delta:+.2f}s"
+                )
+            finally:
+                reel.unlink(missing_ok=True)
+        except RenderError as exc:
+            log.info("no reel re-render for shot %06d: %s", shot, exc)
 
     async def _cmd_digest(self) -> None:
         text = await build_digest(self.client, self.config)

src/matebot/render.py

@@ -26,7 +26,6 @@
 WIDTH = 720
 CHART_H = 406
 PLAYHEAD = "0xF0561D"  # GaggiMate orange
-TAIL_S = 2.0
 
 
 class RenderError(Exception):
@@ -61,7 +60,7 @@ async def render_reel(repo: str | Path, shot_id: int, *, title: str | None = Non
     delay = max(0.0, -offset)  # video starts this long after chart t=0
     trim = max(0.0, offset)  # positive offset: drop the clip's head instead
     dur = geom["t_end"]  # animate across the actual data range
-    total = dur + TAIL_S
+    total = dur  # end exactly when the playhead reaches the end of the x axis
 
     # scale axis geometry from the rendered PNG to the reel's chart panel
     sx, sy = WIDTH / geom["img_w"], CHART_H / geom["img_h"]

tests/test_render.py

@@ -46,6 +46,7 @@ def test_positive_offset_trims_clip(repo, monkeypatch):
     out = asyncio.run(render.render_reel(repo, 4))
     args = calls[0]
     assert args[args.index("-ss") + 1] == "0.60"
+    assert args[args.index("-t") + 1] == f"{GEOM['t_end']:.2f}"  # ends at the x-axis end
     assert "adelay=0|0" in args[args.index("-filter_complex") + 1]
     assert out.read_bytes() == b"reel"
     out.unlink()