diff --git a/server/reflector/processors/__init__.py b/server/reflector/processors/__init__.py
index 8a926f30..52e46c34 100644
--- a/server/reflector/processors/__init__.py
+++ b/server/reflector/processors/__init__.py
@@ -1,10 +1,10 @@
-from .base import Processor, ThreadedProcessor, Pipeline  # noqa: F401
-from .types import AudioFile, Transcript, Word, TitleSummary, FinalSummary  # noqa: F401
-from .audio_file_writer import AudioFileWriterProcessor  # noqa: F401
 from .audio_chunker import AudioChunkerProcessor  # noqa: F401
+from .audio_file_writer import AudioFileWriterProcessor  # noqa: F401
 from .audio_merge import AudioMergeProcessor  # noqa: F401
 from .audio_transcript import AudioTranscriptProcessor  # noqa: F401
 from .audio_transcript_auto import AudioTranscriptAutoProcessor  # noqa: F401
+from .base import Pipeline, PipelineEvent, Processor, ThreadedProcessor  # noqa: F401
+from .transcript_final_summary import TranscriptFinalSummaryProcessor  # noqa: F401
 from .transcript_liner import TranscriptLinerProcessor  # noqa: F401
 from .transcript_topic_detector import TranscriptTopicDetectorProcessor  # noqa: F401
-from .transcript_final_summary import TranscriptFinalSummaryProcessor  # noqa: F401
+from .types import AudioFile, FinalSummary, TitleSummary, Transcript, Word  # noqa: F401
diff --git a/server/reflector/processors/base.py b/server/reflector/processors/base.py
index 35e836bc..78913d1c 100644
--- a/server/reflector/processors/base.py
+++ b/server/reflector/processors/base.py
@@ -3,15 +3,23 @@ from concurrent.futures import ThreadPoolExecutor
 from typing import Any
 from uuid import uuid4
 
+from pydantic import BaseModel
 from reflector.logger import logger
 
 
+class PipelineEvent(BaseModel):
+    processor: str
+    uid: str
+    data: Any
+
+
 class Processor:
     INPUT_TYPE: type = None
     OUTPUT_TYPE: type = None
     WARMUP_EVENT: str = "WARMUP_EVENT"
 
     def __init__(self, callback=None, custom_logger=None):
+        self.name = self.__class__.__name__
         self._processors = []
         self._callbacks = []
         if callback:
@@ -67,6 +75,10 @@ class Processor:
         return default
 
     async def emit(self, data):
+        if self.pipeline:
+            await self.pipeline.emit(
+                PipelineEvent(processor=self.name, uid=self.uid, data=data)
+            )
         for callback in self._callbacks:
             await callback(data)
         for processor in self._processors:
diff --git a/server/reflector/tools/process.py b/server/reflector/tools/process.py
index 68d49b0c..ae60d4a1 100644
--- a/server/reflector/tools/process.py
+++ b/server/reflector/tools/process.py
@@ -1,43 +1,45 @@
+import asyncio
+
 import av
 from reflector.logger import logger
 from reflector.processors import (
-    Pipeline,
     AudioChunkerProcessor,
     AudioMergeProcessor,
     AudioTranscriptAutoProcessor,
+    Pipeline,
+    PipelineEvent,
+    TranscriptFinalSummaryProcessor,
     TranscriptLinerProcessor,
     TranscriptTopicDetectorProcessor,
-    TranscriptFinalSummaryProcessor,
 )
-import asyncio
 
 
-async def process_audio_file(filename, event_callback, only_transcript=False):
-    async def on_transcript(data):
-        await event_callback("transcript", data)
-
-    async def on_topic(data):
-        await event_callback("topic", data)
-
-    async def on_summary(data):
-        await event_callback("summary", data)
-
+async def process_audio_file(
+    filename,
+    event_callback,
+    only_transcript=False,
+    source_language="en",
+    target_language="en",
+):
     # build pipeline for audio processing
     processors = [
         AudioChunkerProcessor(),
         AudioMergeProcessor(),
         AudioTranscriptAutoProcessor.as_threaded(),
-        TranscriptLinerProcessor(callback=on_transcript),
+        TranscriptLinerProcessor(),
     ]
     if not only_transcript:
         processors += [
-            TranscriptTopicDetectorProcessor.as_threaded(callback=on_topic),
-            TranscriptFinalSummaryProcessor.as_threaded(callback=on_summary),
+            TranscriptTopicDetectorProcessor.as_threaded(),
+            TranscriptFinalSummaryProcessor.as_threaded(),
         ]
 
     # transcription output
     pipeline = Pipeline(*processors)
+    pipeline.set_pref("audio:source_language", source_language)
+    pipeline.set_pref("audio:target_language", target_language)
     pipeline.describe()
+    pipeline.on(event_callback)
 
     # start processing audio
     logger.info(f"Opening {filename}")
@@ -59,20 +61,35 @@ if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument("source", help="Source file (mp3, wav, mp4...)")
     parser.add_argument("--only-transcript", "-t", action="store_true")
+    parser.add_argument("--source-language", default="en")
+    parser.add_argument("--target-language", default="en")
+    parser.add_argument("--output", "-o", help="Output file (output.jsonl)")
     args = parser.parse_args()
 
-    async def event_callback(event, data):
-        if event == "transcript":
-            print(f"Transcript[{data.human_timestamp}]: {data.text}")
-        elif event == "topic":
-            print(f"Topic[{data.human_timestamp}]: title={data.title}")
-            print(f"Topic[{data.human_timestamp}]: summary={data.summary}")
-        elif event == "summary":
-            print(f"Summary: duration={data.duration}")
-            print(f"Summary: summary={data.summary}")
+    output_fd = None
+    if args.output:
+        output_fd = open(args.output, "w")
+
+    async def event_callback(event: PipelineEvent):
+        processor = event.processor
+        # ignore some processor
+        if processor in ("AudioChunkerProcessor", "AudioMergeProcessor"):
+            return
+        logger.info(f"Event: {event}")
+        if output_fd:
+            output_fd.write(event.model_dump_json())
+            output_fd.write("\n")
 
     asyncio.run(
         process_audio_file(
-            args.source, event_callback, only_transcript=args.only_transcript
+            args.source,
+            event_callback,
+            only_transcript=args.only_transcript,
+            source_language=args.source_language,
+            target_language=args.target_language,
         )
     )
+
+    if output_fd:
+        output_fd.close()
+        logger.info(f"Output written to {args.output}")