app.py

import tempfile
import logging
import os
import asyncio
from moviepy.editor import *
import edge_tts
import gradio as gr
from pydub import AudioSegment

# Configuración de Logs
logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")

# CONSTANTES DE ARCHIVOS
INTRO_VIDEO = "introvideo.mp4"
OUTRO_VIDEO = "outrovideo.mp4"
MUSIC_BG = "musicafondo.mp3"
GLITCH_SOUND = "fxsound.mp3"
EJEMPLO_VIDEO = "ejemplo.mp4"

# Validar existencia de archivos
for file in [INTRO_VIDEO, OUTRO_VIDEO, MUSIC_BG, GLITCH_SOUND, EJEMPLO_VIDEO]:
    if not os.path.exists(file):
        logging.error(f"Falta archivo necesario: {file}")
        raise FileNotFoundError(f"Falta: {file}")

# Configuración de chunks
CHUNK_SIZE = 60  # 1 minuto por chunk
MAX_CHUNKS = 50

def eliminar_archivo_tiempo(ruta, delay=1800):
    def eliminar():
        try:
            if os.path.exists(ruta):
                os.remove(ruta)
                logging.info(f"Archivo eliminado: {ruta}")
        except Exception as e:
            logging.error(f"Error al eliminar {ruta}: {e}")
    from threading import Timer
    Timer(delay, eliminar).start()

async def procesar_audio_tts(texto, voz, duracion_video):
    temp_files = []
    try:
        logging.info("Iniciando procesamiento de TTS")
        if not texto.strip():
            raise ValueError("El texto para TTS no puede estar vacío.")

        # Dividir texto en fragmentos manejables
        def dividir_texto(texto, max_length=2000):
            return [texto[i:i + max_length] for i in range(0, len(texto), max_length)]

        fragmentos = dividir_texto(texto)
        audios_tts = []

        for fragmento in fragmentos:
            communicate = edge_tts.Communicate(fragmento, voz)
            with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_tts:
                await communicate.save(tmp_tts.name)
                tts_audio = AudioFileClip(tmp_tts.name)
                temp_files.append(tmp_tts.name)
                audios_tts.append(tts_audio)

        tts_audio_final = concatenate_audioclips(audios_tts)

        if tts_audio_final.duration > duracion_video:
            tts_audio_final = tts_audio_final.subclip(0, duracion_video)

        logging.info("TTS procesado exitosamente")
        return tts_audio_final, temp_files
    
    except Exception as e:
        logging.error(f"Fallo en procesamiento de TTS: {str(e)}")
        raise
    finally:
        for file in temp_files:
            try:
                os.remove(file)
            except Exception as e:
                logging.warning(f"Error limpiando {file}: {e}")

def crear_musica_fondo(duracion_video):
    """Crea un loop continuo de música de fondo."""
    bg_music = AudioSegment.from_mp3(MUSIC_BG)
    needed_ms = int(duracion_video * 1000)
    repeticiones = needed_ms // len(bg_music) + 1
    bg_music = bg_music * repeticiones
    bg_music = bg_music[:needed_ms].fade_out(1000)
    
    with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_bg:
        bg_music.export(tmp_bg.name, format="mp3")
        return AudioFileClip(tmp_bg.name).volumex(0.15), tmp_bg.name

async def procesar_fragmento(chunk, texto_tts, voz_seleccionada, start_time):
    try:
        duracion_chunk = chunk.duration
        
        # Procesar TTS para este chunk
        tts_audio_final, tts_temp_files = await procesar_audio_tts(
            texto_tts,
            voz_seleccionada,
            duracion_chunk
        )
        
        # Crear música de fondo continua
        bg_audio, bg_temp_file = crear_musica_fondo(duracion_chunk)
        
        # Combinar pistas de audio
        audio_original = chunk.audio
        audios = [bg_audio.set_duration(duracion_chunk)]
        if audio_original:
            audios.append(audio_original.volumex(0.7))
        audios.append(tts_audio_final.volumex(0.85).set_start(0))
        
        audio_final = CompositeAudioClip(audios).set_duration(duracion_chunk)
        
        # Dividir el chunk en segmentos con cortes de 2 segundos
        segment_duration = 18
        overlap = 2
        segments = []

        current_time = 0
        while current_time < duracion_chunk:
            end_time = current_time + segment_duration
            end_time = min(end_time, duracion_chunk)
            
            full_segment = chunk.subclip(current_time, end_time)
            segments.append(full_segment)
            current_time += (segment_duration - overlap)

        # Asegurar que haya al menos un segmento
        if not segments:
            logging.warning("Chunk demasiado corto, devolviendo el chunk original.")
            video_chunk = chunk.set_audio(audio_final)
        else:
            video_chunk = concatenate_videoclips(segments, method="compose")
            video_chunk = video_chunk.set_audio(audio_final)
        
        return video_chunk, tts_temp_files + [bg_temp_file]
            
    except Exception as e:
        logging.error(f"Fallo procesando fragmento: {str(e)}")
        raise

async def procesar_video(video_input, texto_tts, voz_seleccionada):
    temp_files = []
    intro, outro = None, None  # Inicializar variables para evitar errores
    try:
        logging.info("Iniciando procesamiento de video")
        video_original = VideoFileClip(video_input, target_resolution=(720, 1280))
        total_duration = video_original.duration
        
        # Dividir en chunks
        chunks = []
        for start in range(0, int(total_duration), CHUNK_SIZE):
            end = min(start + CHUNK_SIZE, total_duration)
            chunk = video_original.subclip(start, end)
            chunks.append((start, chunk))
        
        # Procesar cada chunk
        processed_clips = []
        for i, (start_time, chunk) in enumerate(chunks):
            logging.info(f"Procesando chunk {i+1}/{len(chunks)}")
            processed_chunk, chunk_temp_files = await procesar_fragmento(chunk, texto_tts, voz_seleccionada, start_time)
            processed_clips.append(processed_chunk)
            temp_files.extend(chunk_temp_files)
        
        # Combinar chunks
        final_video = concatenate_videoclips(processed_clips, method="compose")
        
        # Agregar intro y outro
        intro = VideoFileClip(INTRO_VIDEO, target_resolution=(720, 1280))
        outro = VideoFileClip(OUTRO_VIDEO, target_resolution=(720, 1280))
        final_video = concatenate_videoclips([intro, final_video, outro], method="compose")
        
        # Renderizado final
        with tempfile.NamedTemporaryFile(suffix=".mp4", delete=False) as tmp:
            final_video.write_videofile(
                tmp.name,
                codec="libx264",
                audio_codec="aac",
                fps=24,
                threads=2,
                bitrate="3M",
                ffmpeg_params=[
                    "-preset", "ultrafast",
                    "-crf", "28",
                    "-movflags", "+faststart",
                    "-vf", "scale=1280:720"
                ],
                verbose=False
            )
            eliminar_archivo_tiempo(tmp.name, 1800)
            logging.info(f"Video final guardado: {tmp.name}")
            return tmp.name
            
    except Exception as e:
        logging.error(f"Fallo general: {str(e)}")
        raise
    finally:
        try:
            if video_original:
                video_original.close()
            if intro:
                intro.close()
            if outro:
                outro.close()
            for file in temp_files:
                try:
                    os.remove(file)
                except Exception as e:
                    logging.warning(f"Error limpiando {file}: {e}")
        except Exception as e:
            logging.warning(f"Error al cerrar recursos: {str(e)}")

# Interfaz Gradio
with gr.Blocks() as demo:
    gr.Markdown("# Editor de Video con IA")
    
    with gr.Tab("Principal"):
        video_input = gr.Video(label="Subir video")
        texto_tts = gr.Textbox(
            label="Texto para TTS",
            lines=3,
            placeholder="Escribe aquí tu texto..."
        )
        voz_seleccionada = gr.Dropdown(
            label="Voz",
            choices=["es-ES-AlvaroNeural", "es-MX-BeatrizNeural"],
            value="es-ES-AlvaroNeural"
        )
        procesar_btn = gr.Button("Generar Video")
        video_output = gr.Video(label="Video Procesado")
    
    with gr.Accordion("Ejemplos de Uso", open=False):
        gr.Examples(
            examples=[[EJEMPLO_VIDEO, "¡Hola! Esto es una prueba. Suscríbete al canal."]],
            inputs=[video_input, texto_tts],
            label="Ejemplos"
        )

    procesar_btn.click(
        procesar_video,
        inputs=[video_input, texto_tts, voz_seleccionada],
        outputs=video_output
    )

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