app.py

import openai
from openai import Audio
import os
import yt_dlp as youtube_dl
import guidance
from moviepy.editor import AudioFileClip
import streamlit as st
import os

output_dir = "./Chunks"
output_file = "video_audio.mp3"
chunk_length = 120 * 15
transcripts = []
folder_path = "./Chunks"
audio_file_path = "./.DownloadedAudio"
summary_llm = guidance.llms.OpenAI('gpt-3.5-turbo-16k-0613', caching=False)

st.set_page_config(
    page_title='YouTube Video to Summary',
    page_icon='🐾',
    initial_sidebar_state="auto",
    layout="wide"
)

st.markdown("<h1 style='text-align: center; color: white;'>YouTube Video to Summary</h1>", unsafe_allow_html=True)

st.sidebar.subheader("Enter Your API Key 🗝️")
open_api_key = st.sidebar.text_input(
    "Open API Key", 
    value=st.session_state.get('open_api_key', ''),
    help="Get your API key from https://openai.com/",
    type='password'
)
st.session_state['open_api_key'] = open_api_key
#load_dotenv(find_dotenv())

#Function to download the audio from a youtube video
def download_audio(url, output_file):
    ydl_opts = {
        'format': 'bestaudio/best',
        'outtmpl': '.DownloadedAudio/' + output_file,
        'postprocessors': [{
            'key': 'FFmpegExtractAudio',
            'preferredcodec': 'mp3',
            'preferredquality': '192'
        }],
        #'ffmpeg_location': "C:/ffmpeg/bin"
    }
    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
        ydl.download([url])
    print("Download Complete")



# Function to split the audio file into smaller chunks
def split_audio_file(audio_file_path, chunk_length, output_dir):
    print("== Splitting audio...")
    audio = AudioFileClip(audio_file_path)
    duration = audio.duration
    chunks = []

    start_time = 0
    while start_time < duration:
        end_time = min(start_time + chunk_length, duration)
        chunk = audio.subclip(start_time, end_time)
        chunk_file = os.path.join(output_dir, f"chunk_{start_time}-{end_time}.mp3")
        chunk.write_audiofile(chunk_file)
        chunks.append(chunk_file)
        start_time += chunk_length

    return chunks

def transcribe_audio(audio_file_path):
    with open(audio_file_path, "rb") as audio_file:
        transcript = openai.Audio.transcribe("whisper-1", audio_file)
    print(transcript['text'])
    return transcript['text']

def transcribe_audio_dir(output_dir):
    global transcripts
    for filename in os.listdir(output_dir):
        if filename.endswith(".mp3"):
            file_path = os.path.join(output_dir, filename)
            transcript = transcribe_audio(file_path)
            summary = generate_summary(transcript)
            transcripts.append(summary)
            os.remove(file_path)
    print("Chunk Transcription and Summarization Complete")
    print(transcripts)

    #Summarize the transcripts using the LLM and write to a file

    output_path = os.path.join(os.getcwd(), "Transcripts", "summary.txt")
    with open(output_path, "w", encoding="utf-8") as file:
        for transcript in transcripts:
            file.write(transcript + "\n")

    return transcripts

def generate_summary(text):
    response = openai.ChatCompletion.create(
        model="gpt-3.5-turbo-16k-0613",
        messages=[
        {"role": "system", "content": "You are a world's best Wild Kratts episode summarizer. Condense the transcript text, capturing essential points and core plot points. Include relevant examples, omit excess details, and ensure the summary's length matches the original's complexity."},
        {"role": "user", "content": f"Please summarize the following text:\n{text}\nSummary:"},
    ],
        max_tokens=11000,
        stop=None,
        temperature=0.2,
    )
    summary = response['choices'][0]['message']['content'].strip()
    return summary

#download_audio(url, output_file)

import gradio as gr


def main():
    source = st.radio("Select audio source", ["YouTube Video", "Audio File"])
    if source == "YouTube Video":
        url = st.text_input(label="Video URL")
        audio_file = None
    else:  # Audio File
        audio_file = st.file_uploader("Upload audio file", type=["mp3", "wav"])
        url = None

    chunk_length = st.number_input(label="Chunk Length (seconds)", value=900, step=1)

    return url, "default_output", chunk_length, audio_file

def download_and_split_video(url, output_file, chunk_length, transcripts):
    download_audio(url, output_file)
    audio_file_path = '.DownloadedAudio/' + f"{output_file}.mp3"
    split_audio_file(audio_file_path, chunk_length, output_dir)
    os.remove(audio_file_path)
    return transcribe_audio_dir(output_dir)
    #return transcribe_audio_dir(transcripts)


if __name__ == "__main__":
    url, output_file, chunk_length, audio_file = main()  # get the values here

    if open_api_key:  # Check if API key is provided
        if st.button("Generate Summary"):
            with st.spinner("Summary Generating..."):
                if url:  # If YouTube URL is provided
                    transcripts = download_and_split_video(url, output_file, chunk_length, transcripts)
                elif audio_file:  # If an audio file is uploaded
                    audio_file_path = os.path.join('.DownloadedAudio/', output_file)
                    with open(audio_file_path, "wb") as f:
                        f.write(audio_file.getvalue())  # Write the content of the uploaded file to a new file
                    split_audio_file(audio_file_path, chunk_length, output_dir)
                    transcripts = transcribe_audio_dir(output_dir)
                    os.remove(audio_file_path)  # Delete saved audio file
                st.subheader("Summary")
                for transcript in transcripts:  # Loop through the transcripts list
                    st.write(transcript)
    else:  # If API key is not provided
        st.warning("Please Enter OpenAI API Key")  # Display warning message