Ver Very very Slow

[sysmaya]

What an absurdly slow and exasperating thing.
2 hours to make a 5 minute video??
There are faster alternatives:
FFmpeg only
VidGear

• Anything is faster than MoviePY, it is faster to make the video in

Expected Behavior

You expect a 5-minute video to take less than 10 minutes to complete.

Actual Behavior

2 long hours waiting to build the video

Steps to Reproduce the Problem

Get started by downloading MoviePY
Upload a 5 minute wav audio
place some image clips
and 50 text subtitles

[steinathan]

Very slow indeed, found an alternative yet?

[sysmaya]

Very slow indeed, found an alternative yet?

I'm writing my own functions to use ffmpeg, they are 10 times faster. But it's tedious.

def ffmpeg_image_overlay( start_time, duration, x='(W-w)/2', y='(H-h)/2'):
    """
    Generates an overlay filter for FFmpeg.
    Args:
        image_file (str): Path to the image file.
        start_time (float): Start time in seconds to display the image.
        duration (float): Duration in seconds to display the image.
        x (str): Expression for the horizontal position of the image.
        y (str): Expression for the vertical position of the image.
    Returns:
        str: Overlay filter for FFmpeg.
    """
    return f"[0:v][1:v] overlay={x}:{y}:enable='between(t,{start_time},{start_time + duration})'"

def ffmpeg_run_command(video_input, video_output, filtro, imageFile=''):
    """
    Run the FFmpeg command with the provided filter.    
    Args:
        video_input (str): Path of the input video file.
        video_output (str): Path to the output video file.
        filter (str): Command or FFmpeg filter to apply to the video.    
    Returns:
        bool: True if the command succeeds, False if it fails.
    """
    inicioExec = time.time()
    filtro = re.sub(r'\s+', ' ', filtro)
    lentxt = len(filtro)
    
    caracteres = string.ascii_uppercase + string.digits
    nombreTMP = ''.join(random.choice(caracteres) for _ in range(12))
    nombreTMP = nombreTMP + '.mp4'

    ffmpeg_path = r'C:\\ffmpeg\\bin\\ffmpeg.exe'
    directorio_actual = os.path.dirname(os.path.abspath(__file__))
    video_input = os.path.join(directorio_actual, video_input)

    if imageFile == '' :
        comando = [
            ffmpeg_path,
            '-i', video_input,              # Input del video
            '-vf', filtro,                  # Filtro de video para superponer el texto
            '-codec:a', 'copy',             # Copiar el audio sin modificar
            '-stats',                       # Muestra el banner de avance del proceso
            nombreTMP                       # Archivo de salida
        ]
    else :
        comando = [
            ffmpeg_path,
            '-i', video_input,              # Input del video
            '-i', imageFile,                # Input de la imagen
            '-filter_complex', filtro,      # Filtro de video para superponer la imagen
            '-pix_fmt', 'yuv420p',          # Formato de píxeles
            '-codec:a', 'copy',             # Copiar el audio sin modificar
            '-v', 'quiet',                  # Oculta todos los mensajes excepto el banner de progreso
            '-stats',                       # Muestra el banner de avance del proceso
            nombreTMP                       # Archivo de salida
        ]
    
    try:
        subprocess.run(comando, check=True)
        duracion_ejecucion = time.time() - inicioExec
        minutos = int(duracion_ejecucion // 60)
        segundos = int(duracion_ejecucion % 60)
        milisegundos = int((duracion_ejecucion - int(duracion_ejecucion)) * 1000)
        print(f"run_ffmpeg() OK: {minutos}:{segundos}:{milisegundos}")

        if os.path.exists(video_output): os.remove(video_output)   
        os.rename(nombreTMP, video_output)
        return True
    except subprocess.CalledProcessError as e:
        print(f"run_ffmpeg() Error: {e}")
        return False

[ericmadureira]

Hi everyone, haven't used the lib yet but this issue caught my attention. Is rendering really taking that long?
I'm looking for "video edit via code" libs to automate video editing.

[steinathan]

It is slow, but thats just because of ffmpeg - moviepy don't efficiently make use of ffmpeg, but if you're on Mac, it can get 30% faster by using hevc_videotoolbox decoders

I'm currently using moviepy in my app: https://dub.sh/voidface

[ericmadureira]

Have you heard of https://www.remotion.dev/ or https://re.video/?
I'm reading about them. I'm interested in editing content faster without using GUI programs like capcut, etc.

[steinathan]

Yes heard about them but haven't used them, if you're just looking for editing and cool with react then remotion is the way to go - you'd still need a headless browser to render the video - but it's faster

My use case is mainly automation and Python - sad they're no alternatives to moviepy that's faster