fix(export): name the file from the first write

docs/guide/downloading.md

@@ -800,7 +800,8 @@ The file name tells what the file holds, in the form
 - The scope is `S01` only when the file holds every episode the service lists for that season.
   Otherwise it names each run of episodes. Whole seasons in a row become `S01-S03`. After three
   parts, `+N` counts the parts left out. A movie has no scope.
-- The quality parts come from the tracks in the file. Each value shows once.
+- The quality parts come from the video and audio tracks selected for the titles in the file.
+  Each value shows once.
 - unshackle renames the file after each write, so the name always matches what the file holds.
   When a run stops early, the file is complete for the titles it holds.
 - When another file already has the name, unshackle adds `-2`, `-3`, and so on. It never

tests/core/test_export_name.py

@@ -214,7 +214,7 @@ def test_export_messages(tmp_path: Path, caplog: pytest.LogCaptureFixture) -> No
         instance.log_export_summary()
 
     lines = [r.getMessage() for r in caplog.records]
-    assert "Exporting to Example Movie 2024_1080p_h264_sdr_dash-EXAMPLE.json" in lines
+    assert "Exporting to Example Movie 2024_1080p_h264_sdr_dash_aac2.0-EXAMPLE.json" in lines
     assert "Exported 'Example Movie' (2024): 1 video, 2 audio, 0 subtitles, 1 key" in lines
     final = tmp_path / "Example Movie 2024_1080p_h264_sdr_dash_aac2.0-EXAMPLE.json"
     assert f"Saved the export to {final}: 1 title, 1 key" in lines

unshackle/core/export_name.py

@@ -199,8 +199,14 @@ class ExportNamer:
         self.path: Optional[Path] = None
 
     def add(self, title: Title_T, track: AnyTrack) -> None:
+        """Record ``track`` and the video and audio tracks selected for ``title``.
+
+        The first write of a title is often a subtitle, and a name from that track alone would
+        leave out the quality of the title.
+        """
         self.titles.setdefault(str(title.id), title)
-        self.tracks.setdefault(f"{title.id}/{track.id}", track)
+        for t in [track, *title.tracks.videos, *title.tracks.audio]:
+            self.tracks.setdefault(f"{title.id}/{t.id}", t)
 
     def name(self) -> str:
         return export_name(list(self.titles.values()), self.tracks.values(), self.service_tag, self.seasons)