back app.py

import gradio as gr
import moviepy.editor as mp
import numpy as np
import librosa
from PIL import Image, ImageDraw
import tempfile
import os
import logging

# Configuración de logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s',
    handlers=[logging.StreamHandler()]
)
logger = logging.getLogger("audio_to_video")

def generate_video(audio_file, image_file):
    try:
        # 1. Cargar audio
        y, sr = librosa.load(audio_file)
        duration = librosa.get_duration(y=y, sr=sr)
        logger.info(f"Audio cargado: {duration:.1f} segundos")

        # 2. Cargar imagen
        img = Image.open(image_file).convert('RGB')
        img_w, img_h = img.size
        logger.info(f"Imagen cargada: {img_w}x{img_h}")

        # 3. Crear efecto waveform
        audio_envelope = np.abs(y) / np.max(np.abs(y))  # Normalizar
        audio_envelope *= img_h // 4  # Escalar al 25% de la altura

        # 4. Generar frames
        def make_frame(t):
            frame = img.copy()
            draw = ImageDraw.Draw(frame)
            
            time_idx = int(t * sr)
            start = max(0, time_idx - sr//10)
            end = min(len(audio_envelope), time_idx + sr//10)
            wave_slice = audio_envelope[start:end]
            
            points = []
            for i, val in enumerate(wave_slice):
                x = int((i / len(wave_slice)) * img_w)
                y_pos = img_h//2 - int(val)
                y_neg = img_h//2 + int(val)
                points.extend([(x, y_pos), (x, y_neg)])
            
            if len(points) > 2:
                draw.polygon(points, fill=(255, 0, 0, 128))  # Rojo semitransparente
            
            return np.array(frame)

        # 5. Crear video
        video = mp.VideoClip(make_frame, duration=duration)
        video.fps = 24
        video = video.set_audio(mp.AudioFileClip(audio_file))

        # 6. Guardar video
        with tempfile.NamedTemporaryFile(suffix=".mp4", delete=False) as tmpfile:
            video.write_videofile(
                tmpfile.name,
                codec="libx264",
                audio_codec="aac",
                fps=24,
                logger=None
            )
            
            # Verificar que el archivo existe
            if not os.path.exists(tmpfile.name):
                raise Exception("Error al guardar el video temporal")
            
            logger.info(f"Video guardado: {tmpfile.name}")
            return tmpfile.name  # Retornar la ruta del archivo

    except Exception as e:
        logger.error(f"Error crítico: {str(e)}")
        return f"Error: {str(e)}"

# Interfaz Gradio
iface = gr.Interface(
    fn=generate_video,
    inputs=[
        gr.Audio(type="filepath", label="Audio (WAV/MP3)"),
        gr.Image(type="filepath", label="Imagen de Fondo")
    ],
    outputs=gr.File(label="Descargar Video"),  # Usar File para descargar
    title="Generador de Video Musical",
    description="Crea videos con efectos de audio sincronizados. Sube un audio y una imagen."
)

if __name__ == "__main__":
    iface.queue().launch()