able to re-transcribe

backend/routers/export.py

@@ -55,6 +55,13 @@ class ExportRequest(BaseModel):
     deleted_indices: Optional[List[int]] = None
 
 
+class TranscriptExportRequest(BaseModel):
+    words: List[ExportWordModel]
+    deleted_indices: Optional[List[int]] = None
+    output_path: str
+    format: str = "txt"  # "txt" or "srt"
+
+
 def _map_ranges_to_output_timeline(
     ranges: List[dict],
     keep_segments: List[dict],
@@ -234,3 +241,34 @@ async def export_video(req: ExportRequest):
     except Exception as e:
         logger.error(f"Export error: {e}", exc_info=True)
         raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.post("/export/transcript")
+async def export_transcript(req: TranscriptExportRequest):
+    """Export transcript as plain text or SRT without rendering video."""
+    try:
+        from services.caption_generator import generate_srt
+
+        deleted_set = set(req.deleted_indices or [])
+        word_dicts = [w.model_dump() for w in req.words]
+
+        if req.format == "srt":
+            content = generate_srt(word_dicts, deleted_set)
+        else:
+            # Plain text: join non-deleted words
+            active_words = []
+            for i, w in enumerate(word_dicts):
+                if i not in deleted_set:
+                    active_words.append(w["word"])
+            content = " ".join(active_words)
+
+        os.makedirs(os.path.dirname(req.output_path) or ".", exist_ok=True)
+        with open(req.output_path, "w", encoding="utf-8") as f:
+            f.write(content)
+
+        logger.info("Transcript exported to %s (format=%s)", req.output_path, req.format)
+        return {"status": "ok", "output_path": req.output_path}
+
+    except Exception as e:
+        logger.error(f"Transcript export failed: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=str(e))