implement time-clipped downloads (closes #969, replaces #907)

app/tests/test_download_queue.py

@@ -351,3 +351,38 @@ async def test_extract_info_metube_extract_keys_win_over_preset(dq_env):
     assert result["status"] == "ok"
     assert captured_params[0]["extract_flat"] is True
     assert captured_params[0]["noplaylist"] is True
+
+
+@pytest.mark.asyncio
+async def test_add_sets_clip_bounds_on_download_info(dq_env):
+    notifier = AsyncMock()
+
+    def fake_extract(self, url, ytdl_options_presets=None, ytdl_options_overrides=None):
+        return {
+            "_type": "video",
+            "id": "vid1",
+            "title": "Test Video",
+            "url": url,
+            "webpage_url": url,
+        }
+
+    dq = DownloadQueue(dq_env, notifier)
+    with patch.object(DownloadQueue, "_DownloadQueue__extract_info", fake_extract):
+        result = await dq.add(
+            "https://example.com/clip",
+            "video",
+            "auto",
+            "any",
+            "best",
+            "",
+            "",
+            0,
+            auto_start=False,
+            clip_start=10.0,
+            clip_end=99.5,
+        )
+
+    assert result["status"] == "ok"
+    download = dq.pending.get("https://example.com/clip")
+    assert download.info.clip_start == 10.0
+    assert download.info.clip_end == 99.5