"""Short (3s) MP4 export smoke test in headless Chromium -> /tmp/x.mp4"""
import asyncio, base64
from playwright.async_api import async_playwright
async def main():
    async with async_playwright() as p:
        b = await p.chromium.launch(args=["--use-gl=angle","--use-angle=swiftshader","--enable-unsafe-swiftshader"])
        pg = await b.new_page()
        pg.on("console", lambda m: print(m.text[:300]) if "INFO" in m.text or m.type=="error" else None)
        await pg.goto("http://localhost:5173/preview/production/ed5ba841-ed53-4eec-a8c5-93237d26b7ab/?xdebug=1")
        await pg.wait_for_function("window.__done === true", timeout=400000)
        d = await pg.evaluate("window.__mp4 || ''")
        if d: open("/tmp/x.mp4","wb").write(base64.b64decode(d))
        await b.close()
asyncio.run(main())