From 152b59a094d99bee3b5305a836c2213081b779ee Mon Sep 17 00:00:00 2001
From: atsiem <1068543+ATSiem@users.noreply.github.com>
Date: Fri, 16 Jun 2023 17:32:56 -0400
Subject: [PATCH] add local BART test script - 10min processing for 30min audio
 on M1 8GB

---
 reflector-local/whisper_summarizer_bart.py | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 reflector-local/whisper_summarizer_bart.py

diff --git a/reflector-local/whisper_summarizer_bart.py b/reflector-local/whisper_summarizer_bart.py
new file mode 100644
index 00000000..13b6c66a
--- /dev/null
+++ b/reflector-local/whisper_summarizer_bart.py
@@ -0,0 +1,118 @@
+import argparse
+import os
+import tempfile
+import moviepy.editor
+from loguru import logger
+from transformers import BartTokenizer, BartForConditionalGeneration
+import whisper
+import nltk
+nltk.download('punkt')
+
+WHISPER_MODEL_SIZE = "base"
+
+def init_argparse() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(
+        usage="%(prog)s [OPTIONS] <LOCATION> <OUTPUT>",
+        description="Creates a transcript of a video or audio file, then summarizes it using BART."
+    )
+
+    parser.add_argument("location", help="Location of the media file")
+    parser.add_argument("output", help="Output file path")
+
+    parser.add_argument(
+        "-t", "--transcript", help="Save a copy of the intermediary transcript file", type=str)
+    parser.add_argument(
+        "-l", "--language", help="Language that the summary should be written in",
+        type=str, default="english", choices=['english', 'spanish', 'french', 'german', 'romanian'])
+    parser.add_argument(
+        "-m", "--model_name", help="Name or path of the BART model",
+        type=str, default="facebook/bart-large-cnn")
+
+    return parser
+
+# NLTK chunking function
+def chunk_text(txt, max_chunk_length=500):
+    "Split text into smaller chunks."
+    sentences = nltk.sent_tokenize(txt)
+    chunks = []
+    current_chunk = ""
+    for sentence in sentences:
+        if len(current_chunk) + len(sentence) < max_chunk_length:
+            current_chunk += f" {sentence.strip()}"
+        else:
+            chunks.append(current_chunk.strip())
+            current_chunk = f"{sentence.strip()}"
+    chunks.append(current_chunk.strip())
+    return chunks
+
+# BART summary function
+def summarize_chunks(chunks, tokenizer, model):
+    summaries = []
+    for c in chunks:
+        input_ids = tokenizer.encode(c, return_tensors='pt')
+        summary_ids = model.generate(
+            input_ids, num_beams=4, length_penalty=2.0, max_length=1024, no_repeat_ngram_size=3)
+        summary = tokenizer.decode(summary_ids[0], skip_special_tokens=True)
+        summaries.append(summary)
+    return summaries
+
+def main():
+    import sys
+    sys.setrecursionlimit(10000)
+
+    parser = init_argparse()
+    args = parser.parse_args()
+
+    media_file = args.location
+    logger.info(f"Processing file: {media_file}")
+
+    # If the media file we just retrieved is a video, extract its audio stream.
+    if os.path.isfile(media_file) and media_file.endswith(('.mp4', '.avi', '.flv')):
+        audio_filename = tempfile.NamedTemporaryFile(
+            suffix=".mp3", delete=False).name
+        logger.info(f"Extracting audio to: {audio_filename}")
+
+        video = moviepy.editor.VideoFileClip(media_file)
+        video.audio.write_audiofile(audio_filename, logger=None)
+
+        logger.info("Finished extracting audio")
+        media_file = audio_filename
+
+    # Transcribe the audio file using the OpenAI Whisper model
+    logger.info("Loading Whisper speech-to-text model")
+    whisper_model = whisper.load_model(WHISPER_MODEL_SIZE)
+
+    logger.info(f"Transcribing audio file: {media_file}")
+    whisper_result = whisper_model.transcribe(media_file)
+
+    logger.info("Finished transcribing file")
+
+    # If we got the transcript parameter on the command line, save the transcript to the specified file.
+    if args.transcript:
+        logger.info(f"Saving transcript to: {args.transcript}")
+        transcript_file = open(args.transcript, "w")
+        transcript_file.write(whisper_result["text"])
+        transcript_file.close()
+
+    # Summarize the generated transcript using the BART model
+    logger.info(f"Loading BART model: {args.model_name}")
+    tokenizer = BartTokenizer.from_pretrained(args.model_name)
+    model = BartForConditionalGeneration.from_pretrained(args.model_name)
+
+    logger.info("Breaking transcript into smaller chunks")
+    chunks = chunk_text(whisper_result['text'])
+
+    logger.info(
+        f"Transcript broken into {len(chunks)} chunks of at most 500 words") # TODO fix variable
+
+    logger.info(f"Writing summary text in {args.language} to: {args.output}")
+    with open(args.output, 'w') as f:
+        f.write('Summary of: ' + args.location + "\n\n")
+        summaries = summarize_chunks(chunks, tokenizer, model)
+        for summary in summaries:
+            f.write(summary.strip() + "\n\n")
+
+    logger.info("Summarization completed")
+
+if __name__ == "__main__":
+    main()