app.py

import streamlit as st
import ffmpeg
import os
import time
from PIL import Image
import re
import tempfile
import shutil
import threading

def delete_temp_dir(directory, delay=900):  # 15 minutes = 900 seconds
    timer = threading.Timer(delay, shutil.rmtree, [directory])
    timer.start()

st.set_page_config(layout="wide", page_title="Video Conversion Tool")

# Supported formats
supported_formats = [data.upper() for data in (sorted(['3GP', 'ASF', 'AVI', 'DIVX', 'FLV', 'M2TS', 'M4V', 'MKV', 'MOV', 'MP4', 'MPEG', 'MPG', 'MTS', 'TS', 'VOB', 'WEBM', 'WMV', 'XVID'])) if data not in ['3GP', 'DIVX', 'XVID']]
audio_formats = [data.upper() for data in (sorted(['MP3', 'WAV', 'AAC', 'FLAC', 'OGG', 'M4A', 'ALAC', 'WMA', 'AIFF', 'OPUS', 'APE', 'CAF', 'PCM', 'DTS', 'TTA', 'AMR', 'MID', 'SPX', 'WV', 'RA', 'TAK'])) if data not in ['ALC', 'AMR', 'APE', 'DTS', 'MID', 'PCM', 'RA', 'TAK']]
gif_formats = ['GIF']
image_formats = [data.upper() for data in sorted(Image.SAVE.keys() or ['BLP', 'BMP', 'BUFR', 'DDS', 'DIB', 'EPS', 'GIF', 'GRIB', 'HDF5', 'ICNS', 'ICO', 'IM',
                                              'JPEG', 'JPEG2000', 'MPO', 'MSP', 'PALM', 'PCX', 'PDF', 'PNG', 'PPM', 'SGI', 'SPIDER', 
                                              'TGA', 'TIFF', 'WEBP', 'WMX', 'XBM'])]

CACHE_DIR = tempfile.mkdtemp()
delete_temp_dir(CACHE_DIR, delay=900)  # Clean up cache after 15 minutes

def sanitize_filename(filename):
    """Sanitize filename by removing special characters and spaces."""
    return re.sub(r'[^a-zA-Z0-9_.-]', '_', filename)

def clean_cache():
    """Remove files in the cache directory older than 15 minutes."""
    now = time.time()
    for file in os.listdir(CACHE_DIR):
        file_path = os.path.join(CACHE_DIR, file)
        if os.path.isfile(file_path) and now - os.path.getmtime(file_path) > 900:  # 15 minutes
            os.remove(file_path)

def get_video_duration(video_path):
    """Get video duration in seconds using ffmpeg."""
    probe = ffmpeg.probe(video_path, v='error', select_streams='v:0', show_entries='stream=duration')
    return float(probe['streams'][0]['duration'])

def convert_video(video, target_format, conversion_type, time_in_seconds=None):
    try:
        # Create a temporary directory for the uploaded file
        temp_dir = tempfile.mkdtemp()

        # Sanitize the filename and save the uploaded video to the temp directory
        base_name = os.path.splitext(os.path.basename(video.name))[0]
        sanitized_base_name = sanitize_filename(base_name)
        video_path = os.path.join(temp_dir, f"{sanitized_base_name}.mp4")  # Saving as mp4 by default for now

        with open(video_path, "wb") as f:
            f.write(video.getbuffer())  # Save the uploaded video to a local file

        if conversion_type == 'Video to Video':
            output_file = f"flowly_ai_video_converter_{sanitized_base_name}.{target_format.lower()}"
            ffmpeg.input(video_path).output(output_file).overwrite_output().run()  # Add .overwrite_output()
            return output_file

        elif conversion_type == 'Video to Audio':
            audio_output_file = f"flowly_ai_video_to_audio_{sanitized_base_name}.{target_format.lower()}"
            ffmpeg.input(video_path).output(audio_output_file).overwrite_output().run()  # Add .overwrite_output()
            return audio_output_file

        elif conversion_type == 'Video to GIF':
            gif_output_file = f"flowly_ai_video_to_gif_{sanitized_base_name}.gif"
            ffmpeg.input(video_path).output(gif_output_file, vf="fps=10,scale=320:-1:flags=lanczos").overwrite_output().run()  # Add .overwrite_output()
            return gif_output_file

        elif conversion_type == 'Video to Image':
            if time_in_seconds is None:
                return "Please specify a valid time in seconds for image extraction."

            image_output_file = f"flowly_ai_video_to_image_{sanitized_base_name}_{time_in_seconds}.png"
            ffmpeg.input(video_path, ss=time_in_seconds).output(image_output_file, vframes=1).overwrite_output().run()  # Add .overwrite_output()

            return image_output_file

    except Exception as e:
        return f"Error: {e}"
        
def update_format_choices(conversion_type):
    """Update available format choices based on the conversion type."""
    if conversion_type == 'Video to Video':
        return supported_formats
    elif conversion_type == 'Video to Audio':
        return audio_formats
    elif conversion_type == 'Video to GIF':
        return gif_formats
    elif conversion_type == 'Video to Image':
        return image_formats
    return []

def main():
    st.title("Video Conversion Tool")
    st.write("Convert videos to audio, GIFs, images, or other formats easily with this powerful tool.")

    # Create two columns
    col1, col2 = st.columns([1, 1])

    with col1:
        # Upload video file
        video_file = st.file_uploader("Upload a Video", type=supported_formats)
        if video_file:
            st.video(video_file)

    with col2:
        if video_file:
            # Save uploaded video to cache
            temp_video_path = os.path.join(CACHE_DIR, video_file.name)
            with open(temp_video_path, "wb") as f:
                f.write(video_file.getbuffer())

            # Get video duration
            video_duration = get_video_duration(temp_video_path)

            # Select conversion type
            conversion_type = st.selectbox(
                "Select Conversion Type", 
                ['Video to Video', 'Video to Audio', 'Video to GIF', 'Video to Image']
            )

            # Update format choices based on conversion type
            target_format_choices = update_format_choices(conversion_type)
            target_format = st.selectbox("Select Target Format", target_format_choices)

            # If 'Video to Image' conversion, ask for time in seconds
            if conversion_type == 'Video to Image':
                time_in_seconds = st.slider(
                    label="Time (in seconds) for image extraction",
                    min_value=0, 
                    max_value=int(video_duration),
                    value=0,
                    step=1
                )
            else:
                time_in_seconds = None

            if st.button("Convert"):
                with st.spinner("Converting..."):
                    output_file = convert_video(video_file, target_format, conversion_type, time_in_seconds)

                    if "Error" in output_file:
                        st.error(output_file)
                    else:
                        st.success("Conversion Successful! Download the file:")
                        st.download_button(
                            label="Download Converted File", 
                            data=open(output_file, 'rb').read(), 
                            file_name=os.path.basename(output_file)
                        )

if __name__ == "__main__":
    main()