app.py

import os
import shutil
import subprocess
import sys
import uuid
from pathlib import Path

import gradio as gr
from moviepy.editor import AudioFileClip

output_dir = Path("temp/").absolute()
output_dir.mkdir(exist_ok=True, parents=True)


class SpotifyApi:
    spotify_directory = Path("spotify")
    final_directory = output_dir

    def __init__(self):
        self.setup_spotify()

    def setup_spotify(self) -> None:
        # Check if the credentials file exists
        if not os.path.exists("spotify.rc"):
            with open("spotify.rc", "w") as f:
                f.write(
                    f"{os.environ['SPOTIFY_USERNAME']} {os.environ['SPOTIFY_PASSWORD']}"
                )
        subprocess.call(["spodcast", "-l", "spotify.rc"])

    def download_episode(self, episode_url) -> str:
        # Generate a 8 character random string
        foldername = str(uuid.uuid4())[:8]
        out_path = (self.spotify_directory / foldername).resolve()
        subprocess.call(["spodcast", "--root-path", out_path, episode_url])
        self.foldername = foldername
        mp3_path = self.get_final_mp3()
        assert mp3_path is not None
        return mp3_path

    def get_final_mp3(self):
        # Look in all the subdirectories of spotify for the mp3 file
        for root, dirs, files in os.walk(
            Path(self.spotify_directory / self.foldername).resolve()
        ):
            for file in files:
                if file.endswith(".mp3"):
                    final_mp3 = (
                        Path(self.final_directory / self.foldername)
                        .with_suffix(".mp3")
                        .absolute()
                    )
                    shutil.copy(os.path.join(root, file), final_mp3)
                    shutil.rmtree(
                        Path(self.spotify_directory / self.foldername).absolute()
                    )
                    return final_mp3.as_posix()


class AudioInput:
    def __init__(self, path: str, start_time: int, run_for: int):
        self.path = path
        self.start_time = start_time
        self.run_for = run_for


def process_inputs(
    prompt: str, audio_path: str, spotify_url: str, start_time: int, run_for: int
) -> str:
    audio_input = AudioInput(audio_path, start_time, run_for)
    if spotify_url:
        spotify = SpotifyApi()
        audio_input.path = spotify.download_episode(spotify_url)
    images = get_stable_diffusion_images(prompt)
    video = animate_images(images, audio_input)
    return video


def animate_images(image_paths: list[str], audio_input: AudioInput) -> str:
    from animate import (  # Only import after git clone and when necessary takes loooong
        create_mp4_with_audio,
        get_video_frames,
    )

    # Generate a random folder name and change directories to there
    foldername = str(uuid.uuid4())[:8]
    vid_output_dir = Path(output_dir / foldername)
    vid_output_dir.mkdir(exist_ok=True, parents=True)
    audio_clip = AudioFileClip(audio_input.path)
    audio_clip = audio_clip.subclip(
        audio_input.start_time, audio_input.start_time + audio_input.run_for
    )
    video_frames, cv2_images = get_video_frames(image_paths, vid_output_dir)
    path = Path(vid_output_dir / "output_final.mp4")
    return create_mp4_with_audio(
        video_frames, cv2_images, audio_clip.duration, audio_clip, path
    )


def get_stable_diffusion_images(prompt) -> str:
    stable_diffusion = gr.Blocks.load(name="spaces/stabilityai/stable-diffusion")
    gallery_dir = stable_diffusion(prompt, fn_index=2)
    return [os.path.join(gallery_dir, img) for img in os.listdir(gallery_dir)][:2]


iface = gr.Interface(
    fn=process_inputs,
    inputs=[
        gr.Textbox(label="Describe your podcast clip"),
        gr.Audio(type="filepath", label="Upload an mp3"),
        gr.Textbox(label="Or Paste a spotify episode link"),
        gr.Number(label="Start time (in seconds)"),
        gr.Number(label="Run for (in seconds)"),
    ],
    outputs="video",
)

if __name__ == "__main__":
    subprocess.call(
        [
            "git",
            "clone",
            "https://github.com/google-research/frame-interpolation",
            "frame_interpolation",
        ]
    )  # install frame_interplation I guess
    sys.path.append("frame_interpolation")

    # My installs
    os.chdir(
        output_dir
    )  # change working directory to output_dir because the hf spaces model has no option to specify output directory ¯\_(ツ)_/¯
    iface.launch()