app.py

import logging
import requests
import gradio
from urllib.parse import urlparse
import subprocess
from pathlib import Path
from moviepy.editor import VideoFileClip
import gradio as gr
from gradio import components
import http.server
import socketserver
import threading

# Define output directory
output_dir = Path.cwd() / "output"
output_dir.mkdir(exist_ok=True)

logging.basicConfig(level=logging.INFO)

standard_resolutions = [240, 360, 480, 720, 1080, 1440, 2160, 4320]
quality_mapping = {
    "Low": 35,
    "Medium": 23,
    "High": 18,
}

def start_http_server(port=8000):
    handler = http.server.SimpleHTTPRequestHandler
    httpd = socketserver.TCPServer(("", port), handler)
    logging.info(f"Serving at port {port}")
    thread = threading.Thread(target=httpd.serve_forever)
    thread.start()
    
def download_file(url, destination):
    response = requests.get(url)
    response.raise_for_status()
    with open(destination, 'wb') as f:
        f.write(response.content)

def get_input_path(video_file, video_url):
    if video_file is not None:
        return Path(video_file.name)
    elif video_url:
        url_path = urlparse(video_url).path
        file_name = Path(url_path).name
        destination = output_dir / file_name
        download_file(video_url, destination)
        return destination
    else:
        raise ValueError("No input was provided.")

def get_output_path(input_path, res):
    output_path = output_dir / (Path(input_path).stem + f"_{res}.m3u8")
    return output_path

def get_aspect_ratio(input_path, aspect_ratio):
    if aspect_ratio is not None:
        return aspect_ratio
    video = VideoFileClip(str(input_path))
    return f"{video.size[0]}:{video.size[1]}"

def create_master_playlist(output_paths):
    master_playlist_path = output_dir / "master_playlist.m3u8"
    with open(master_playlist_path, 'w') as f:
        f.write("#EXTM3U\n")
        for path in output_paths:
            f.write(f"#EXT-X-STREAM-INF:BANDWIDTH={1000*1000},RESOLUTION={path.stem.split('_')[-1]}\n")
            f.write(f"{path.name}\n")
    return master_playlist_path

def convert_video(video_file, quality, aspect_ratio, video_url):
    input_path = get_input_path(video_file, video_url)
    aspect_ratio = get_aspect_ratio(input_path, aspect_ratio)

    video = VideoFileClip(str(input_path))
    original_height = video.size[1]

    output_paths = []

    for res in standard_resolutions:
        if res > original_height:
            continue

        scale = "-1:" + str(res)
        output_path = get_output_path(input_path, str(res) + 'p')

        ffmpeg_command = [
    "ffmpeg", "-i", str(input_path), "-c:v", "libx264", "-crf", str(quality),
            "-vf", f"scale={scale}:force_original_aspect_ratio=decrease,pad=ceil(iw/2)*2:ceil(ih/2)*2",
            "-hls_time", "10", "-hls_playlist_type", "vod", "-hls_segment_filename",
            str(output_dir / f"{output_path.stem}_%03d.ts"), str(output_path)
        ]

        logging.info("Running ffmpeg command: " + ' '.join(ffmpeg_command))
        subprocess.run(ffmpeg_command, check=True)

        output_paths.append(output_path)

    master_playlist_path = create_master_playlist(output_paths)
    output_paths.append(master_playlist_path)

       # After generating the video files, create links to them
    output_links = []
    for path in output_paths:
        output_links.append(f'<a href="http://your_server_ip:{http_server_port}/{path}" target="_blank">Download {Path(path).stem}</a>')
    output_html = "<br>".join(output_links)
    return output_html

# Change "video" to "file"
video_file = gradio.inputs.File(label="Your video file")
quality = gradio.inputs.Slider(minimum=1, maximum=50, default=25, label="Quality (1:Speed - 50:Quality)")
aspect_ratio = gradio.inputs.Dropdown(["16:9", "4:3", "1:1", "3:4", "9:16", "1:1", "2:1", "1:2"], label="Aspect Ratio", default="16:9")
video_url = gradio.inputs.Textbox(lines=1, placeholder="or paste video url here", label="Video URL")

# Update the aspect ratio selection to include the comprehensive list
# aspect_ratio = gr.inputs.Dropdown(choices=aspect_ratios, label="Aspect Ratio", default="16:9")

interface = gradio.Interface(
    fn=convert_video, 
    inputs=[video_file, quality, aspect_ratio, video_url],
    outputs=gradio.outputs.HTML(label="Download Links"),
    title="NEAR Hub Video Transcoder to m3u8",
    description="convert video files to m3u8 for VOD streaming",
    allow_flagging=False
)

start_http_server(http_server_port)
interface.launch(server_name="0.0.0.0", server_port=7860)