import gradio as gr
import subprocess
import tempfile
import os

def convert_webm_to_mp4(webm_file):
    if webm_file is None:
        return None

    tmp_dir = tempfile.mkdtemp()
    mp4_path = os.path.join(tmp_dir, "output.mp4")

    try:
        subprocess.run(
            [
                "ffmpeg",
                "-y",
                "-i", webm_file,
                "-c:v", "libx264",
                "-preset", "fast",
                "-crf", "23",
                mp4_path
            ],
            check=True,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE
        )
    except subprocess.CalledProcessError as e:
        return f"Erro ao converter: {e.stderr.decode()}"

    return mp4_path

# --- Interface Gradio ---
with gr.Blocks() as demo:
    gr.Markdown("## WebM → MP4 Converter")

    # <-- aqui removemos 'type' -->
    webm_input = gr.Video(label="Upload WebM")
    mp4_output = gr.File(label="Download MP4")
    convert_btn = gr.Button("Convert to MP4")

    convert_btn.click(fn=convert_webm_to_mp4, inputs=[webm_input], outputs=[mp4_output])

# Rodar app
if __name__ == "__main__":
    demo.launch(server_name="0.0.0.0", server_port=7860, share=True)