server: correctly save duration, when filewriter is finished

server/migrations/versions/4814901632bc_fix_duration.py

@@ -0,0 +1,64 @@
+"""fix duration
+
+Revision ID: 4814901632bc
+Revises: 38a927dcb099
+Create Date: 2023-11-10 18:12:17.886522
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.sql import table, column
+from sqlalchemy import select
+
+
+# revision identifiers, used by Alembic.
+revision: str = "4814901632bc"
+down_revision: Union[str, None] = "38a927dcb099"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # for all the transcripts, calculate the duration from the mp3
+    # and update the duration column
+    from pathlib import Path
+    from reflector.settings import settings
+    import av
+
+    bind = op.get_bind()
+    transcript = table(
+        "transcript", column("id", sa.String), column("duration", sa.Float)
+    )
+
+    # select only the one with duration = 0
+    results = bind.execute(
+        select([transcript.c.id, transcript.c.duration]).where(
+            transcript.c.duration == 0
+        )
+    )
+
+    data_dir = Path(settings.DATA_DIR)
+    for row in results:
+        audio_path = data_dir / row["id"] / "audio.mp3"
+        if not audio_path.exists():
+            continue
+
+        try:
+            print(f"Processing {audio_path}")
+            container = av.open(audio_path.as_posix())
+            print(container.duration)
+            duration = round(float(container.duration / av.time_base), 2)
+            print(f"Duration: {duration}")
+            bind.execute(
+                transcript.update()
+                .where(transcript.c.id == row["id"])
+                .values(duration=duration)
+            )
+        except Exception as e:
+            print(f"Failed to process {audio_path}: {e}")
+
+
+def downgrade() -> None:
+    pass