Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.


Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

string

Summary: string


Summary: Create a 30-second screen recording video of a browser navigating to https://nitrobutton.com, with a centered orange watermark 'nitrobutton.com rulez!' and a real-time date/time overlay at the bottom right corner.

X11 or Xvfb virtual display for running a browser headlessly with GUI

A browser that can be automated (chromium, firefox, etc.)

which chromium chromium-browser google-chrome firefox 2>/dev/null | head -5

FFmpeg for screen recording and video overlay composition

which ffmpeg && ffmpeg -version 2>&1 | head -3

Tools for X11 screen capture (ffmpeg x11grab or alternatives)

ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab

Available fonts for text overlay

Python for browser automation scripts (selenium/playwright)

Check package manager for installing missing dependencies

which apt apt-get dnf yum pacman 2>/dev/null | head -1

This task requires: 1) Setting up a virtual display (Xvfb) if no physical display is available, 2) Launching a browser to navigate to the target URL, 3) Recording the screen for 30 seconds using ffmpeg x11grab, 4) Adding text overlays (centered watermark + bottom-right real-time timestamp) using ffmpeg drawtext filters. The real-time timestamp will update frame-by-frame during encoding. All intermediate files will be in /tmp/execution, and the final video will be placed in the current working directory.


Available fonts for text overlay

Available fonts for text overlay


Ask for the next step at the end of the previous command results; keep steps small. Include estimated_seconds and ensure it is realistic for the step.

Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

string

Explanation: string(optional)

string


Check environment capabilities for screen recording task

Explanation: Before proceeding, we need to verify what tools are available: display server, browsers, ffmpeg with x11grab support, fonts for text overlay, and Python for browser automation. This will determine our approach.

echo '=== Display Server ===' && echo "DISPLAY=$DISPLAY" && which Xvfb xvfb-run 2>/dev/null || echo 'Xvfb not found'

echo '=== Browsers ===' && (which chromium chromium-browser google-chrome firefox 2>/dev/null || echo 'No browser found') | head -5

echo '=== FFmpeg ===' && which ffmpeg && ffmpeg -version 2>&1 | head -3

echo '=== X11grab support ===' && ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab || echo 'x11grab not found'

echo '=== Fonts ===' && fc-list : family 2>/dev/null | head -10 || echo 'fc-list not available'

echo '=== Python ===' && which python3 && python3 --version

echo '=== Package Manager ===' && (which apt apt-get dnf yum pacman 2>/dev/null | head -1) || echo 'No package manager found'

echo '=== Selenium/Playwright check ===' && python3 -c 'import selenium; print("selenium:", selenium.__version__)' 2>/dev/null || echo 'selenium not installed' && python3 -c 'import playwright; print("playwright available")' 2>/dev/null || echo 'playwright not installed'


echo '=== Display Server ===' && echo "DISPLAY=$DISPLAY" && which Xvfb xvfb-run 2>/dev/null || echo 'Xvfb not found'


=== Display Server ===
DISPLAY=
/usr/bin/Xvfb
/usr/bin/xvfb-run


echo '=== Browsers ===' && (which chromium chromium-browser google-chrome firefox 2>/dev/null || echo 'No browser found') | head -5


=== Browsers ===
/usr/bin/chromium-browser
No browser found


echo '=== FFmpeg ===' && which ffmpeg && ffmpeg -version 2>&1 | head -3


=== FFmpeg ===
/usr/bin/ffmpeg
ffmpeg version 6.1.1-3ubuntu5 Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 13 (Ubuntu 13.2.0-23ubuntu3)
configuration: --prefix=/usr --extra-version=3ubuntu5 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --disable-omx --enable-gnutls --enable-libaom --enable-libass --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libharfbuzz --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-openal --enable-opencl --enable-opengl --disable-sndio --enable-libvpl --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-ladspa --enable-libbluray --enable-libjack --enable-libpulse --enable-librabbitmq --enable-librist --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libx264 --enable-libzmq --enable-libzvbi --enable-lv2 --enable-sdl2 --enable-libplacebo --enable-librav1e --enable-pocketsphinx --enable-librsvg --enable-libjxl --enable-shared


echo '=== X11grab support ===' && ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab || echo 'x11grab not found'


=== X11grab support ===
 D  x11grab         X11 screen capture, using XCB


echo '=== Fonts ===' && fc-list : family 2>/dev/null | head -10 || echo 'fc-list not available'


=== Fonts ===
DejaVu Math TeX Gyre
DejaVu Sans Mono
DejaVu Sans,DejaVu Sans Light
DejaVu Sans
DejaVu Serif,DejaVu Serif Condensed
DejaVu Sans,DejaVu Sans Condensed
Liberation Sans Narrow
Liberation Mono
Liberation Serif
Liberation Sans


echo '=== Python ===' && which python3 && python3 --version


=== Python ===
/usr/bin/python3
Python 3.12.3


echo '=== Package Manager ===' && (which apt apt-get dnf yum pacman 2>/dev/null | head -1) || echo 'No package manager found'


echo '=== Selenium/Playwright check ===' && python3 -c 'import selenium; print("selenium:", selenium.__version__)' 2>/dev/null || echo 'selenium not installed' && python3 -c 'import playwright; print("playwright available")' 2>/dev/null || echo 'playwright not installed'


=== Selenium/Playwright check ===
selenium not installed
playwright available


Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.


Environment check completed successfully. FFmpeg is available with x11grab support, Playwright is installed for browser automation, Xvfb is available for virtual display, and fonts are present. We have all the tools needed to proceed with the screen recording task.

Set up /tmp/execution directory and install Playwright browser binaries if needed, then create the screen recording script


Ask for the next step at the end of the previous command results; keep steps small. Include estimated_seconds and ensure it is realistic for the step.

Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

string

Explanation: string(optional)

string


Create execution directory and verify Playwright browser installation

Explanation: We need to create the /tmp/execution directory for intermediate files and verify that Playwright has browser binaries installed. If not, we'll need to install them. Playwright was detected as available but we need to confirm the browser binaries are ready.

cd /tmp/execution && python3 -c "from playwright.sync_api import sync_playwright; p = sync_playwright().start(); browser = p.chromium.launch(headless=True); browser.close(); p.stop(); print('Playwright chromium browser is ready')" 2>&1 || echo 'Playwright browser not installed, will need to install'


cd /tmp/execution && python3 -c "from playwright.sync_api import sync_playwright; p = sync_playwright().start(); browser = p.chromium.launch(headless=True); browser.close(); p.stop(); print('Playwright chromium browser is ready')" 2>&1 || echo 'Playwright browser not installed, will need to install'


Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.12/dist-packages/playwright/sync_api/_generated.py", line 14566, in launch
    self._sync(
  File "/usr/local/lib/python3.12/dist-packages/playwright/_impl/_sync_base.py", line 115, in _sync
    return task.result()
           ^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/playwright/_impl/_browser_type.py", line 97, in launch
    await self._channel.send(
  File "/usr/local/lib/python3.12/dist-packages/playwright/_impl/_connection.py", line 69, in send
    return await self._connection.wrap_api_call(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/playwright/_impl/_connection.py", line 559, in wrap_api_call
    raise rewrite_error(error, f"{parsed_st['apiName']}: {error}") from None
playwright._impl._errors.Error: BrowserType.launch: Executable doesn't exist at /root/.cache/ms-playwright/chromium_headless_shell-1208/chrome-headless-shell-linux64/chrome-headless-shell
╔════════════════════════════════════════════════════════════╗
║ Looks like Playwright was just installed or updated.       ║
║ Please run the following command to download new browsers: ║
║                                                            ║
║     playwright install                                     ║
║                                                            ║
║ <3 Playwright Team                                         ║
╚════════════════════════════════════════════════════════════╝
Playwright browser not installed, will need to install


total 0
drwxr-xr-x 1 root root  40 Mar  2 08:09 .
drwxrwxrwt 1 root root 100 Mar  2 08:10 ..


Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.


The /tmp/execution directory was successfully created and is empty as expected. The Playwright chromium browser check likely failed silently (no 'Playwright chromium browser is ready' message in output), but the directory creation succeeded with return code 0. The next step should install Playwright browsers if needed and proceed with the video recording setup.

Install Playwright browsers using 'playwright install chromium' and its system dependencies, then set up the Xvfb virtual display for headful browser recording with ffmpeg x11grab.


Ask for the next step at the end of the previous command results; keep steps small. Include estimated_seconds and ensure it is realistic for the step.

Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

string

Explanation: string(optional)

string


Install Playwright chromium browser binaries

Explanation: The previous step showed Playwright browsers are not installed (error message indicated 'Executable doesn't exist'). We need to install the chromium browser using 'playwright install chromium'. This is required for browser automation with a visible GUI that we can screen record.

cd /tmp/execution && python3 -m playwright install chromium 2>&1

python3 -c "from playwright.sync_api import sync_playwright; p = sync_playwright().start(); browser = p.chromium.launch(headless=True); browser.close(); p.stop(); print('Playwright chromium browser is ready')" 2>&1


cd /tmp/execution && python3 -m playwright install chromium 2>&1


Downloading Chrome for Testing 145.0.7632.6 (playwright chromium v1208) from https://cdn.playwright.dev/chrome-for-testing-public/145.0.7632.6/linux64/chrome-linux64.zip
(node:103) [DEP0169] DeprecationWarning: `url.parse()` behavior is not standardized and prone to errors that have security implications. Use the WHATWG URL API instead. CVEs are not issued for `url.parse()` vulnerabilities.
(Use `node --trace-deprecation ...` to show where the warning was created)
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Chrome for Testing 145.0.7632.6 (playwright chromium v1208) downloaded to /root/.cache/ms-playwright/chromium-1208
Downloading FFmpeg (playwright ffmpeg v1011) from https://cdn.playwright.dev/dbazure/download/playwright/builds/ffmpeg/1011/ffmpeg-linux.zip
(node:114) [DEP0169] DeprecationWarning: `url.parse()` behavior is not standardized and prone to errors that have security implications. Use the WHATWG URL API instead. CVEs are not issued for `url.parse()` vulnerabilities.
(Use `node --trace-deprecation ...` to show where the warning was created)
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FFmpeg (playwright ffmpeg v1011) downloaded to /root/.cache/ms-playwright/ffmpeg-1011
Downloading Chrome Headless Shell 145.0.7632.6 (playwright chromium-headless-shell v1208) from https://cdn.playwright.dev/chrome-for-testing-public/145.0.7632.6/linux64/chrome-headless-shell-linux64.zip
(node:125) [DEP0169] DeprecationWarning: `url.parse()` behavior is not standardized and prone to errors that have security implications. Use the WHATWG URL API instead. CVEs are not issued for `url.parse()` vulnerabilities.
(Use `node --trace-deprecation ...` to show where the warning was created)
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Chrome Headless Shell 145.0.7632.6 (playwright chromium-headless-shell v1208) downloaded to /root/.cache/ms-playwright/chromium_headless_shell-1208


python3 -c "from playwright.sync_api import sync_playwright; p = sync_playwright().start(); browser = p.chromium.launch(headless=True); browser.close(); p.stop(); print('Playwright chromium browser is ready')" 2>&1


Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.


Playwright chromium browser successfully installed and verified working. The test script launched and closed the browser without errors, printing 'Playwright chromium browser is ready'. Now we can proceed to set up the virtual display and screen recording.

Set up Xvfb virtual display, launch chromium browser navigating to https://nitrobutton.com in headed mode, and start ffmpeg screen recording with the required text overlays (centered orange watermark and real-time timestamp at bottom right).


Ask for the next step at the end of the previous command results; keep steps small. Include estimated_seconds and ensure it is realistic for the step.

Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

string

Explanation: string(optional)

string


Create Python script for browser automation with Xvfb and screen recording

Explanation: Now that Playwright is working, we need to create a comprehensive Python script that will: 1) Start Xvfb virtual display, 2) Launch chromium in headed mode on that display, 3) Navigate to nitrobutton.com, 4) Start ffmpeg recording with x11grab capturing the virtual display, 5) Add text overlays (centered orange watermark + real-time timestamp), 6) Record for 30 seconds, then clean up. Creating the script first allows us to review it before execution.

cat > /tmp/execution/record_browser.py << 'PYTHON_SCRIPT'
#!/usr/bin/env python3
"""
Screen recording script:
- Starts Xvfb virtual display
- Launches Chromium browser navigating to nitrobutton.com
- Records screen with ffmpeg for 30 seconds
- Adds centered orange watermark and real-time timestamp overlay
"""

import subprocess
import time
import os
import signal
import sys

# Configuration
DISPLAY_NUM = 99
SCREEN_WIDTH = 1280
SCREEN_HEIGHT = 720
RECORD_DURATION = 30
URL = "https://nitrobutton.com"
OUTPUT_FILE = "/tmp/execution/nitrobutton_recording.mp4"

def cleanup(xvfb_proc, browser_proc, ffmpeg_proc):
    """Clean up all processes"""
    print("Cleaning up processes...")
    for proc, name in [(ffmpeg_proc, "ffmpeg"), (browser_proc, "browser"), (xvfb_proc, "Xvfb")]:
        if proc and proc.poll() is None:
            try:
                proc.terminate()
                proc.wait(timeout=5)
                print(f"{name} terminated gracefully")
            except subprocess.TimeoutExpired:
                proc.kill()
                proc.wait()
                print(f"{name} killed")
            except Exception as e:
                print(f"Error cleaning up {name}: {e}")

def main():
    xvfb_proc = None
    browser_proc = None
    ffmpeg_proc = None

    try:
        # Step 1: Start Xvfb virtual display
        print(f"Starting Xvfb on display :{DISPLAY_NUM}...")
        xvfb_cmd = [
            "Xvfb", f":{DISPLAY_NUM}",
            "-screen", "0", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}x24",
            "-ac"  # Disable access control
        ]
        xvfb_proc = subprocess.Popen(
            xvfb_cmd,
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
            preexec_fn=os.setsid
        )
        time.sleep(2)  # Wait for Xvfb to start

        # Check if Xvfb is running
        if xvfb_proc.poll() is not None:
            print("ERROR: Xvfb failed to start")
            return 1
        print(f"Xvfb started with PID {xvfb_proc.pid}")

        # Set DISPLAY environment variable
        os.environ["DISPLAY"] = f":{DISPLAY_NUM}"

        # Step 2: Launch browser with Playwright
        print(f"Launching browser and navigating to {URL}...")
        browser_script = f'''
import os
os.environ["DISPLAY"] = ":{DISPLAY_NUM}"
from playwright.sync_api import sync_playwright
import time

with sync_playwright() as p:
    browser = p.chromium.launch(
        headless=False,
        args=[
            "--no-sandbox",
            "--disable-gpu",
            "--disable-dev-shm-usage",
            f"--window-size={SCREEN_WIDTH},{SCREEN_HEIGHT}",
            "--window-position=0,0"
        ]
    )
    context = browser.new_context(
        viewport={{"width": {SCREEN_WIDTH}, "height": {SCREEN_HEIGHT}}},
        no_viewport=False
    )
    page = context.new_page()
    page.goto("{URL}", wait_until="networkidle", timeout=30000)
    print("Page loaded, keeping browser open for recording...")
    # Keep browser open for the recording duration + buffer
    time.sleep({RECORD_DURATION + 10})
    browser.close()
'''

        # Write browser script to file
        browser_script_file = "/tmp/execution/browser_nav.py"
        with open(browser_script_file, "w") as f:
            f.write(browser_script)

        # Start browser in background
        browser_proc = subprocess.Popen(
            ["python3", browser_script_file],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            env={**os.environ, "DISPLAY": f":{DISPLAY_NUM}"},
            preexec_fn=os.setsid
        )

        # Wait for browser to load page
        print("Waiting for browser to load page...")
        time.sleep(8)

        if browser_proc.poll() is not None:
            stdout, stderr = browser_proc.communicate()
            print(f"ERROR: Browser process exited early")
            print(f"stdout: {stdout.decode()}")
            print(f"stderr: {stderr.decode()}")
            return 1
        print(f"Browser running with PID {browser_proc.pid}")

        # Step 3: Start ffmpeg screen recording with overlays
        print(f"Starting screen recording for {RECORD_DURATION} seconds...")

        # FFmpeg command with text overlays:
        # - Centered orange watermark: "nitrobutton.com rulez!"
        # - Real-time timestamp at bottom right
        ffmpeg_cmd = [
            "ffmpeg",
            "-y",  # Overwrite output
            "-video_size", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}",
            "-framerate", "25",
            "-f", "x11grab",
            "-i", f":{DISPLAY_NUM}.0",
            "-t", str(RECORD_DURATION),
            "-vf", (
                # Centered orange watermark
                "drawtext=text='nitrobutton.com rulez!':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:"
                "fontsize=48:"
                "fontcolor=orange:"
                "x=(w-text_w)/2:"
                "y=(h-text_h)/2:"
                "shadowcolor=black:"
                "shadowx=2:"
                "shadowy=2,"
                # Real-time timestamp at bottom right
                "drawtext=text='%{localtime\\:%Y-%m-%d %H\\:%M\\:%S}':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:"
                "fontsize=24:"
                "fontcolor=white:"
                "x=w-text_w-20:"
                "y=h-text_h-20:"
                "shadowcolor=black:"
                "shadowx=1:"
                "shadowy=1"
            ),
            "-c:v", "libx264",
            "-preset", "fast",
            "-crf", "23",
            "-pix_fmt", "yuv420p",
            OUTPUT_FILE
        ]

        print(f"FFmpeg command: {' '.join(ffmpeg_cmd)}")

        ffmpeg_proc = subprocess.Popen(
            ffmpeg_cmd,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            preexec_fn=os.setsid
        )

        # Wait for recording to complete
        print(f"Recording in progress...")
        try:
            stdout, stderr = ffmpeg_proc.communicate(timeout=RECORD_DURATION + 30)
            print(f"FFmpeg finished with return code: {ffmpeg_proc.returncode}")
            if ffmpeg_proc.returncode != 0:
                print(f"FFmpeg stderr: {stderr.decode()[-2000:]}")
        except subprocess.TimeoutExpired:
            print("FFmpeg timeout, terminating...")
            ffmpeg_proc.terminate()
            ffmpeg_proc.wait(timeout=5)

        # Check output file
        if os.path.exists(OUTPUT_FILE):
            file_size = os.path.getsize(OUTPUT_FILE)
            print(f"Recording saved to {OUTPUT_FILE} ({file_size} bytes)")
            return 0
        else:
            print("ERROR: Output file not created")
            return 1

    except Exception as e:
        print(f"ERROR: {e}")
        import traceback
        traceback.print_exc()
        return 1
    finally:
        cleanup(xvfb_proc, browser_proc, ffmpeg_proc)

if __name__ == "__main__":
    sys.exit(main())
PYTHON_SCRIPT

echo '=== Script created ===' && wc -l /tmp/execution/record_browser.py && head -50 /tmp/execution/record_browser.py


cat > /tmp/execution/record_browser.py << 'PYTHON_SCRIPT'
#!/usr/bin/env python3
"""
Screen recording script:
- Starts Xvfb virtual display
- Launches Chromium browser navigating to nitrobutton.com
- Records screen with ffmpeg for 30 seconds
- Adds centered orange watermark and real-time timestamp overlay
"""

import subprocess
import time
import os
import signal
import sys

# Configuration
DISPLAY_NUM = 99
SCREEN_WIDTH = 1280
SCREEN_HEIGHT = 720
RECORD_DURATION = 30
URL = "https://nitrobutton.com"
OUTPUT_FILE = "/tmp/execution/nitrobutton_recording.mp4"

def cleanup(xvfb_proc, browser_proc, ffmpeg_proc):
    """Clean up all processes"""
    print("Cleaning up processes...")
    for proc, name in [(ffmpeg_proc, "ffmpeg"), (browser_proc, "browser"), (xvfb_proc, "Xvfb")]:
        if proc and proc.poll() is None:
            try:
                proc.terminate()
                proc.wait(timeout=5)
                print(f"{name} terminated gracefully")
            except subprocess.TimeoutExpired:
                proc.kill()
                proc.wait()
                print(f"{name} killed")
            except Exception as e:
                print(f"Error cleaning up {name}: {e}")

def main():
    xvfb_proc = None
    browser_proc = None
    ffmpeg_proc = None

    try:
        # Step 1: Start Xvfb virtual display
        print(f"Starting Xvfb on display :{DISPLAY_NUM}...")
        xvfb_cmd = [
            "Xvfb", f":{DISPLAY_NUM}",
            "-screen", "0", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}x24",
            "-ac"  # Disable access control
        ]
        xvfb_proc = subprocess.Popen(
            xvfb_cmd,
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
            preexec_fn=os.setsid
        )
        time.sleep(2)  # Wait for Xvfb to start

        # Check if Xvfb is running
        if xvfb_proc.poll() is not None:
            print("ERROR: Xvfb failed to start")
            return 1
        print(f"Xvfb started with PID {xvfb_proc.pid}")

        # Set DISPLAY environment variable
        os.environ["DISPLAY"] = f":{DISPLAY_NUM}"

        # Step 2: Launch browser with Playwright
        print(f"Launching browser and navigating to {URL}...")
        browser_script = f'''
import os
os.environ["DISPLAY"] = ":{DISPLAY_NUM}"
from playwright.sync_api import sync_playwright
import time

with sync_playwright() as p:
    browser = p.chromium.launch(
        headless=False,
        args=[
            "--no-sandbox",
            "--disable-gpu",
            "--disable-dev-shm-usage",
            f"--window-size={SCREEN_WIDTH},{SCREEN_HEIGHT}",
            "--window-position=0,0"
        ]
    )
    context = browser.new_context(
        viewport={{"width": {SCREEN_WIDTH}, "height": {SCREEN_HEIGHT}}},
        no_viewport=False
    )
    page = context.new_page()
    page.goto("{URL}", wait_until="networkidle", timeout=30000)
    print("Page loaded, keeping browser open for recording...")
    # Keep browser open for the recording duration + buffer
    time.sleep({RECORD_DURATION + 10})
    browser.close()
'''

        # Write browser script to file
        browser_script_file = "/tmp/execution/browser_nav.py"
        with open(browser_script_file, "w") as f:
            f.write(browser_script)

        # Start browser in background
        browser_proc = subprocess.Popen(
            ["python3", browser_script_file],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            env={**os.environ, "DISPLAY": f":{DISPLAY_NUM}"},
            preexec_fn=os.setsid
        )

        # Wait for browser to load page
        print("Waiting for browser to load page...")
        time.sleep(8)

        if browser_proc.poll() is not None:
            stdout, stderr = browser_proc.communicate()
            print(f"ERROR: Browser process exited early")
            print(f"stdout: {stdout.decode()}")
            print(f"stderr: {stderr.decode()}")
            return 1
        print(f"Browser running with PID {browser_proc.pid}")

        # Step 3: Start ffmpeg screen recording with overlays
        print(f"Starting screen recording for {RECORD_DURATION} seconds...")

        # FFmpeg command with text overlays:
        # - Centered orange watermark: "nitrobutton.com rulez!"
        # - Real-time timestamp at bottom right
        ffmpeg_cmd = [
            "ffmpeg",
            "-y",  # Overwrite output
            "-video_size", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}",
            "-framerate", "25",
            "-f", "x11grab",
            "-i", f":{DISPLAY_NUM}.0",
            "-t", str(RECORD_DURATION),
            "-vf", (
                # Centered orange watermark
                "drawtext=text='nitrobutton.com rulez!':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:"
                "fontsize=48:"
                "fontcolor=orange:"
                "x=(w-text_w)/2:"
                "y=(h-text_h)/2:"
                "shadowcolor=black:"
                "shadowx=2:"
                "shadowy=2,"
                # Real-time timestamp at bottom right
                "drawtext=text='%{localtime\\:%Y-%m-%d %H\\:%M\\:%S}':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:"
                "fontsize=24:"
                "fontcolor=white:"
                "x=w-text_w-20:"
                "y=h-text_h-20:"
                "shadowcolor=black:"
                "shadowx=1:"
                "shadowy=1"
            ),
            "-c:v", "libx264",
            "-preset", "fast",
            "-crf", "23",
            "-pix_fmt", "yuv420p",
            OUTPUT_FILE
        ]

        print(f"FFmpeg command: {' '.join(ffmpeg_cmd)}")

        ffmpeg_proc = subprocess.Popen(
            ffmpeg_cmd,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            preexec_fn=os.setsid
        )

        # Wait for recording to complete
        print(f"Recording in progress...")
        try:
            stdout, stderr = ffmpeg_proc.communicate(timeout=RECORD_DURATION + 30)
            print(f"FFmpeg finished with return code: {ffmpeg_proc.returncode}")
            if ffmpeg_proc.returncode != 0:
                print(f"FFmpeg stderr: {stderr.decode()[-2000:]}")
        except subprocess.TimeoutExpired:
            print("FFmpeg timeout, terminating...")
            ffmpeg_proc.terminate()
            ffmpeg_proc.wait(timeout=5)

        # Check output file
        if os.path.exists(OUTPUT_FILE):
            file_size = os.path.getsize(OUTPUT_FILE)
            print(f"Recording saved to {OUTPUT_FILE} ({file_size} bytes)")
            return 0
        else:
            print("ERROR: Output file not created")
            return 1

    except Exception as e:
        print(f"ERROR: {e}")
        import traceback
        traceback.print_exc()
        return 1
    finally:
        cleanup(xvfb_proc, browser_proc, ffmpeg_proc)

if __name__ == "__main__":
    sys.exit(main())
PYTHON_SCRIPT


echo '=== Script created ===' && wc -l /tmp/execution/record_browser.py && head -50 /tmp/execution/record_browser.py


=== Script created ===
209 /tmp/execution/record_browser.py
#!/usr/bin/env python3
"""
Screen recording script:
- Starts Xvfb virtual display
- Launches Chromium browser navigating to nitrobutton.com
- Records screen with ffmpeg for 30 seconds
- Adds centered orange watermark and real-time timestamp overlay
"""

import subprocess
import time
import os
import signal
import sys

# Configuration
DISPLAY_NUM = 99
SCREEN_WIDTH = 1280
SCREEN_HEIGHT = 720
RECORD_DURATION = 30
URL = "https://nitrobutton.com"
OUTPUT_FILE = "/tmp/execution/nitrobutton_recording.mp4"

def cleanup(xvfb_proc, browser_proc, ffmpeg_proc):
    """Clean up all processes"""
    print("Cleaning up processes...")
    for proc, name in [(ffmpeg_proc, "ffmpeg"), (browser_proc, "browser"), (xvfb_proc, "Xvfb")]:
        if proc and proc.poll() is None:
            try:
                proc.terminate()
                proc.wait(timeout=5)
                print(f"{name} terminated gracefully")
            except subprocess.TimeoutExpired:
                proc.kill()
                proc.wait()
                print(f"{name} killed")
            except Exception as e:
                print(f"Error cleaning up {name}: {e}")

def main():
    xvfb_proc = None
    browser_proc = None
    ffmpeg_proc = None

    try:
        # Step 1: Start Xvfb virtual display
        print(f"Starting Xvfb on display :{DISPLAY_NUM}...")
        xvfb_cmd = [
            "Xvfb", f":{DISPLAY_NUM}",
            "-screen", "0", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}x24",


which chromium chromium-browser google-chrome firefox 2>/dev/null | head -5

which ffmpeg && ffmpeg -version 2>&1 | head -3

ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab

Available fonts for text overlay

which apt apt-get dnf yum pacman 2>/dev/null | head -1

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.


The Python script was successfully created at /tmp/execution/record_browser.py with 209 lines. The script contains all the necessary components: Xvfb setup, browser launching with Playwright, ffmpeg screen recording with x11grab, centered orange 'nitrobutton.com rulez!' watermark using drawtext filter, and real-time timestamp overlay at bottom right. The script includes proper cleanup handlers and error handling. Ready to execute the script.

Execute the recording script with a timeout to ensure it completes: timeout 120 python3 /tmp/execution/record_browser.py, then verify the output video file was created and has the expected properties (duration ~30s, correct resolution, text overlays visible)


Ask for the next step at the end of the previous command results; keep steps small. Include estimated_seconds and ensure it is realistic for the step.

Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

string

Explanation: string(optional)

string

echo '=== Display Server ===' && echo "DISPLAY=$DISPLAY" && which Xvfb xvfb-run 2>/dev/null || echo 'Xvfb not found'

echo '=== Browsers ===' && (which chromium chromium-browser google-chrome firefox 2>/dev/null || echo 'No browser found') | head -5

echo '=== FFmpeg ===' && which ffmpeg && ffmpeg -version 2>&1 | head -3

echo '=== X11grab support ===' && ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab || echo 'x11grab not found'

echo '=== Fonts ===' && fc-list : family 2>/dev/null | head -10 || echo 'fc-list not available'

echo '=== Python ===' && which python3 && python3 --version

echo '=== Package Manager ===' && (which apt apt-get dnf yum pacman 2>/dev/null | head -1) || echo 'No package manager found'

echo '=== Selenium/Playwright check ===' && python3 -c 'import selenium; print("selenium:", selenium.__version__)' 2>/dev/null || echo 'selenium not installed' && python3 -c 'import playwright; print("playwright available")' 2>/dev/null || echo 'playwright not installed'

cd /tmp/execution && python3 -c "from playwright.sync_api import sync_playwright; p = sync_playwright().start(); browser = p.chromium.launch(headless=True); browser.close(); p.stop(); print('Playwright chromium browser is ready')" 2>&1 || echo 'Playwright browser not installed, will need to install'

cd /tmp/execution && python3 -m playwright install chromium 2>&1

cat > /tmp/execution/record_browser.py << 'PYTHON_SCRIPT'
#!/usr/bin/env python3
"""
Screen recording script:
- Starts Xvfb virtual display
- Launches Chromium browser navigating to nitrobutton.com
- Records screen with ffmpeg for 30 seconds
- Adds centered orange watermark and real-time timestamp overlay
"""

import subprocess
import time
import os
import signal
import sys

# Configuration
DISPLAY_NUM = 99
SCREEN_WIDTH = 1280
SCREEN_HEIGHT = 720
RECORD_DURATION = 30
URL = "https://nitrobutton.com"
OUTPUT_FILE = "/tmp/execution/nitrobutton_recording.mp4"

def cleanup(xvfb_proc, browser_proc, ffmpeg_proc):
    """Clean up all processes"""
    print("Cleaning up processes...")
    for proc, name in [(ffmpeg_proc, "ffmpeg"), (browser_proc, "browser"), (xvfb_proc, "Xvfb")]:
        if proc and proc.poll() is None:
            try:
                proc.terminate()
                proc.wait(timeout=5)
                print(f"{name} terminated gracefully")
            except subprocess.TimeoutExpired:
                proc.kill()
                proc.wait()
                print(f"{name} killed")
            except Exception as e:
                print(f"Error cleaning up {name}: {e}")

def main():
    xvfb_proc = None
    browser_proc = None
    ffmpeg_proc = None

    try:
        # Step 1: Start Xvfb virtual display
        print(f"Starting Xvfb on display :{DISPLAY_NUM}...")
        xvfb_cmd = [
            "Xvfb", f":{DISPLAY_NUM}",
            "-screen", "0", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}x24",
            "-ac"  # Disable access control
        ]
        xvfb_proc = subprocess.Popen(
            xvfb_cmd,
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
            preexec_fn=os.setsid
        )
        time.sleep(2)  # Wait for Xvfb to start

        # Check if Xvfb is running
        if xvfb_proc.poll() is not None:
            print("ERROR: Xvfb failed to start")
            return 1
        print(f"Xvfb started with PID {xvfb_proc.pid}")

        # Set DISPLAY environment variable
        os.environ["DISPLAY"] = f":{DISPLAY_NUM}"

        # Step 2: Launch browser with Playwright
        print(f"Launching browser and navigating to {URL}...")
        browser_script = f'''
import os
os.environ["DISPLAY"] = ":{DISPLAY_NUM}"
from playwright.sync_api import sync_playwright
import time

with sync_playwright() as p:
    browser = p.chromium.launch(
        headless=False,
        args=[
            "--no-sandbox",
            "--disable-gpu",
            "--disable-dev-shm-usage",
            f"--window-size={SCREEN_WIDTH},{SCREEN_HEIGHT}",
            "--window-position=0,0"
        ]
    )
    context = browser.new_context(
        viewport={{"width": {SCREEN_WIDTH}, "height": {SCREEN_HEIGHT}}},
        no_viewport=False
    )
    page = context.new_page()
    page.goto("{URL}", wait_until="networkidle", timeout=30000)
    print("Page loaded, keeping browser open for recording...")
    # Keep browser open for the recording duration + buffer
    time.sleep({RECORD_DURATION + 10})
    browser.close()
'''

        # Write browser script to file
        browser_script_file = "/tmp/execution/browser_nav.py"
        with open(browser_script_file, "w") as f:
            f.write(browser_script)

        # Start browser in background
        browser_proc = subprocess.Popen(
            ["python3", browser_script_file],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            env={**os.environ, "DISPLAY": f":{DISPLAY_NUM}"},
            preexec_fn=os.setsid
        )

        # Wait for browser to load page
        print("Waiting for browser to load page...")
        time.sleep(8)

        if browser_proc.poll() is not None:
            stdout, stderr = browser_proc.communicate()
            print(f"ERROR: Browser process exited early")
            print(f"stdout: {stdout.decode()}")
            print(f"stderr: {stderr.decode()}")
            return 1
        print(f"Browser running with PID {browser_proc.pid}")

        # Step 3: Start ffmpeg screen recording with overlays
        print(f"Starting screen recording for {RECORD_DURATION} seconds...")

        # FFmpeg command with text overlays:
        # - Centered orange watermark: "nitrobutton.com rulez!"
        # - Real-time timestamp at bottom right
        ffmpeg_cmd = [
            "ffmpeg",
            "-y",  # Overwrite output
            "-video_size", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}",
            "-framerate", "25",
            "-f", "x11grab",
            "-i", f":{DISPLAY_NUM}.0",
            "-t", str(RECORD_DURATION),
            "-vf", (
                # Centered orange watermark
                "drawtext=text='nitrobutton.com rulez!':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:"
                "fontsize=48:"
                "fontcolor=orange:"
                "x=(w-text_w)/2:"
                "y=(h-text_h)/2:"
                "shadowcolor=black:"
                "shadowx=2:"
                "shadowy=2,"
                # Real-time timestamp at bottom right
                "drawtext=text='%{localtime\\:%Y-%m-%d %H\\:%M\\:%S}':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:"
                "fontsize=24:"
                "fontcolor=white:"
                "x=w-text_w-20:"
                "y=h-text_h-20:"
                "shadowcolor=black:"
                "shadowx=1:"
                "shadowy=1"
            ),
            "-c:v", "libx264",
            "-preset", "fast",
            "-crf", "23",
            "-pix_fmt", "yuv420p",
            OUTPUT_FILE
        ]

        print(f"FFmpeg command: {' '.join(ffmpeg_cmd)}")

        ffmpeg_proc = subprocess.Popen(
            ffmpeg_cmd,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            preexec_fn=os.setsid
        )

        # Wait for recording to complete
        print(f"Recording in progress...")
        try:
            stdout, stderr = ffmpeg_proc.communicate(timeout=RECORD_DURATION + 30)
            print(f"FFmpeg finished with return code: {ffmpeg_proc.returncode}")
            if ffmpeg_proc.returncode != 0:
                print(f"FFmpeg stderr: {stderr.decode()[-2000:]}")
        except subprocess.TimeoutExpired:
            print("FFmpeg timeout, terminating...")
            ffmpeg_proc.terminate()
            ffmpeg_proc.wait(timeout=5)

        # Check output file
        if os.path.exists(OUTPUT_FILE):
            file_size = os.path.getsize(OUTPUT_FILE)
            print(f"Recording saved to {OUTPUT_FILE} ({file_size} bytes)")
            return 0
        else:
            print("ERROR: Output file not created")
            return 1

    except Exception as e:
        print(f"ERROR: {e}")
        import traceback
        traceback.print_exc()
        return 1
    finally:
        cleanup(xvfb_proc, browser_proc, ffmpeg_proc)

if __name__ == "__main__":
    sys.exit(main())
PYTHON_SCRIPT

echo '=== Script created ===' && wc -l /tmp/execution/record_browser.py && head -50 /tmp/execution/record_browser.py


Execute the screen recording script

Explanation: The recording script is ready. Now we need to execute it with a timeout to ensure it completes. The script will: start Xvfb, launch the browser to nitrobutton.com, record for 30 seconds with ffmpeg adding the overlays, then clean up. We use timeout 120s to allow for browser startup (8s) + recording (30s) + cleanup + margin.

timeout 120 python3 /tmp/execution/record_browser.py 2>&1

echo '=== Checking output ===' && ls -la /tmp/execution/*.mp4 2>/dev/null || echo 'No mp4 files found'

if [ -f /tmp/execution/nitrobutton_recording.mp4 ]; then echo '=== Video file info ===' && ffprobe -v error -show_entries format=duration,size -show_entries stream=width,height,codec_name -of default=noprint_wrappers=1 /tmp/execution/nitrobutton_recording.mp4 2>&1; fi


Execute the screen recording script

Execute the screen recording script


timeout 120 python3 /tmp/execution/record_browser.py 2>&1


Starting Xvfb on display :99...
Xvfb started with PID 224
Launching browser and navigating to https://nitrobutton.com...
Waiting for browser to load page...
Browser running with PID 227
Starting screen recording for 30 seconds...
FFmpeg command: ffmpeg -y -video_size 1280x720 -framerate 25 -f x11grab -i :99.0 -t 30 -vf drawtext=text='nitrobutton.com rulez!':fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:fontsize=48:fontcolor=orange:x=(w-text_w)/2:y=(h-text_h)/2:shadowcolor=black:shadowx=2:shadowy=2,drawtext=text='%{localtime\:%Y-%m-%d %H\:%M\:%S}':fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:fontsize=24:fontcolor=white:x=w-text_w-20:y=h-text_h-20:shadowcolor=black:shadowx=1:shadowy=1 -c:v libx264 -preset fast -crf 23 -pix_fmt yuv420p /tmp/execution/nitrobutton_recording.mp4
Recording in progress...
FFmpeg finished with return code: 0
Recording saved to /tmp/execution/nitrobutton_recording.mp4 (260903 bytes)
Cleaning up processes...
browser terminated gracefully
Xvfb terminated gracefully


echo '=== Checking output ===' && ls -la /tmp/execution/*.mp4 2>/dev/null || echo 'No mp4 files found'


=== Checking output ===
-rw-r--r-- 1 root root 260903 Mar  2 08:12 /tmp/execution/nitrobutton_recording.mp4


if [ -f /tmp/execution/nitrobutton_recording.mp4 ]; then echo '=== Video file info ===' && ffprobe -v error -show_entries format=duration,size -show_entries stream=width,height,codec_name -of default=noprint_wrappers=1 /tmp/execution/nitrobutton_recording.mp4 2>&1; fi


=== Video file info ===
codec_name=h264
width=1280
height=720
duration=30.000000
size=260903


which chromium chromium-browser google-chrome firefox 2>/dev/null | head -5

which ffmpeg && ffmpeg -version 2>&1 | head -3

ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab

Available fonts for text overlay

which apt apt-get dnf yum pacman 2>/dev/null | head -1

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

Execute the screen recording script


The recording was successful. The video file /tmp/execution/nitrobutton_recording.mp4 was created with the correct properties: H.264 codec, 1280x720 resolution, exactly 30 seconds duration (30.000000), and ~261KB file size. The ffprobe output confirms the video is valid and properly encoded.

Copy the final video to the current working directory and create a zip archive of /tmp/execution as requested.


Ask for the next step at the end of the previous command results; keep steps small. Include estimated_seconds and ensure it is realistic for the step.

Available fonts for text overlay

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.

string

Explanation: string(optional)

string

echo '=== Display Server ===' && echo "DISPLAY=$DISPLAY" && which Xvfb xvfb-run 2>/dev/null || echo 'Xvfb not found'

echo '=== Browsers ===' && (which chromium chromium-browser google-chrome firefox 2>/dev/null || echo 'No browser found') | head -5

echo '=== FFmpeg ===' && which ffmpeg && ffmpeg -version 2>&1 | head -3

echo '=== X11grab support ===' && ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab || echo 'x11grab not found'

echo '=== Fonts ===' && fc-list : family 2>/dev/null | head -10 || echo 'fc-list not available'

echo '=== Python ===' && which python3 && python3 --version

echo '=== Package Manager ===' && (which apt apt-get dnf yum pacman 2>/dev/null | head -1) || echo 'No package manager found'

echo '=== Selenium/Playwright check ===' && python3 -c 'import selenium; print("selenium:", selenium.__version__)' 2>/dev/null || echo 'selenium not installed' && python3 -c 'import playwright; print("playwright available")' 2>/dev/null || echo 'playwright not installed'

cd /tmp/execution && python3 -c "from playwright.sync_api import sync_playwright; p = sync_playwright().start(); browser = p.chromium.launch(headless=True); browser.close(); p.stop(); print('Playwright chromium browser is ready')" 2>&1 || echo 'Playwright browser not installed, will need to install'

cd /tmp/execution && python3 -m playwright install chromium 2>&1

cat > /tmp/execution/record_browser.py << 'PYTHON_SCRIPT'
#!/usr/bin/env python3
"""
Screen recording script:
- Starts Xvfb virtual display
- Launches Chromium browser navigating to nitrobutton.com
- Records screen with ffmpeg for 30 seconds
- Adds centered orange watermark and real-time timestamp overlay
"""

import subprocess
import time
import os
import signal
import sys

# Configuration
DISPLAY_NUM = 99
SCREEN_WIDTH = 1280
SCREEN_HEIGHT = 720
RECORD_DURATION = 30
URL = "https://nitrobutton.com"
OUTPUT_FILE = "/tmp/execution/nitrobutton_recording.mp4"

def cleanup(xvfb_proc, browser_proc, ffmpeg_proc):
    """Clean up all processes"""
    print("Cleaning up processes...")
    for proc, name in [(ffmpeg_proc, "ffmpeg"), (browser_proc, "browser"), (xvfb_proc, "Xvfb")]:
        if proc and proc.poll() is None:
            try:
                proc.terminate()
                proc.wait(timeout=5)
                print(f"{name} terminated gracefully")
            except subprocess.TimeoutExpired:
                proc.kill()
                proc.wait()
                print(f"{name} killed")
            except Exception as e:
                print(f"Error cleaning up {name}: {e}")

def main():
    xvfb_proc = None
    browser_proc = None
    ffmpeg_proc = None

    try:
        # Step 1: Start Xvfb virtual display
        print(f"Starting Xvfb on display :{DISPLAY_NUM}...")
        xvfb_cmd = [
            "Xvfb", f":{DISPLAY_NUM}",
            "-screen", "0", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}x24",
            "-ac"  # Disable access control
        ]
        xvfb_proc = subprocess.Popen(
            xvfb_cmd,
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
            preexec_fn=os.setsid
        )
        time.sleep(2)  # Wait for Xvfb to start

        # Check if Xvfb is running
        if xvfb_proc.poll() is not None:
            print("ERROR: Xvfb failed to start")
            return 1
        print(f"Xvfb started with PID {xvfb_proc.pid}")

        # Set DISPLAY environment variable
        os.environ["DISPLAY"] = f":{DISPLAY_NUM}"

        # Step 2: Launch browser with Playwright
        print(f"Launching browser and navigating to {URL}...")
        browser_script = f'''
import os
os.environ["DISPLAY"] = ":{DISPLAY_NUM}"
from playwright.sync_api import sync_playwright
import time

with sync_playwright() as p:
    browser = p.chromium.launch(
        headless=False,
        args=[
            "--no-sandbox",
            "--disable-gpu",
            "--disable-dev-shm-usage",
            f"--window-size={SCREEN_WIDTH},{SCREEN_HEIGHT}",
            "--window-position=0,0"
        ]
    )
    context = browser.new_context(
        viewport={{"width": {SCREEN_WIDTH}, "height": {SCREEN_HEIGHT}}},
        no_viewport=False
    )
    page = context.new_page()
    page.goto("{URL}", wait_until="networkidle", timeout=30000)
    print("Page loaded, keeping browser open for recording...")
    # Keep browser open for the recording duration + buffer
    time.sleep({RECORD_DURATION + 10})
    browser.close()
'''

        # Write browser script to file
        browser_script_file = "/tmp/execution/browser_nav.py"
        with open(browser_script_file, "w") as f:
            f.write(browser_script)

        # Start browser in background
        browser_proc = subprocess.Popen(
            ["python3", browser_script_file],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            env={**os.environ, "DISPLAY": f":{DISPLAY_NUM}"},
            preexec_fn=os.setsid
        )

        # Wait for browser to load page
        print("Waiting for browser to load page...")
        time.sleep(8)

        if browser_proc.poll() is not None:
            stdout, stderr = browser_proc.communicate()
            print(f"ERROR: Browser process exited early")
            print(f"stdout: {stdout.decode()}")
            print(f"stderr: {stderr.decode()}")
            return 1
        print(f"Browser running with PID {browser_proc.pid}")

        # Step 3: Start ffmpeg screen recording with overlays
        print(f"Starting screen recording for {RECORD_DURATION} seconds...")

        # FFmpeg command with text overlays:
        # - Centered orange watermark: "nitrobutton.com rulez!"
        # - Real-time timestamp at bottom right
        ffmpeg_cmd = [
            "ffmpeg",
            "-y",  # Overwrite output
            "-video_size", f"{SCREEN_WIDTH}x{SCREEN_HEIGHT}",
            "-framerate", "25",
            "-f", "x11grab",
            "-i", f":{DISPLAY_NUM}.0",
            "-t", str(RECORD_DURATION),
            "-vf", (
                # Centered orange watermark
                "drawtext=text='nitrobutton.com rulez!':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:"
                "fontsize=48:"
                "fontcolor=orange:"
                "x=(w-text_w)/2:"
                "y=(h-text_h)/2:"
                "shadowcolor=black:"
                "shadowx=2:"
                "shadowy=2,"
                # Real-time timestamp at bottom right
                "drawtext=text='%{localtime\\:%Y-%m-%d %H\\:%M\\:%S}':"
                "fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:"
                "fontsize=24:"
                "fontcolor=white:"
                "x=w-text_w-20:"
                "y=h-text_h-20:"
                "shadowcolor=black:"
                "shadowx=1:"
                "shadowy=1"
            ),
            "-c:v", "libx264",
            "-preset", "fast",
            "-crf", "23",
            "-pix_fmt", "yuv420p",
            OUTPUT_FILE
        ]

        print(f"FFmpeg command: {' '.join(ffmpeg_cmd)}")

        ffmpeg_proc = subprocess.Popen(
            ffmpeg_cmd,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            preexec_fn=os.setsid
        )

        # Wait for recording to complete
        print(f"Recording in progress...")
        try:
            stdout, stderr = ffmpeg_proc.communicate(timeout=RECORD_DURATION + 30)
            print(f"FFmpeg finished with return code: {ffmpeg_proc.returncode}")
            if ffmpeg_proc.returncode != 0:
                print(f"FFmpeg stderr: {stderr.decode()[-2000:]}")
        except subprocess.TimeoutExpired:
            print("FFmpeg timeout, terminating...")
            ffmpeg_proc.terminate()
            ffmpeg_proc.wait(timeout=5)

        # Check output file
        if os.path.exists(OUTPUT_FILE):
            file_size = os.path.getsize(OUTPUT_FILE)
            print(f"Recording saved to {OUTPUT_FILE} ({file_size} bytes)")
            return 0
        else:
            print("ERROR: Output file not created")
            return 1

    except Exception as e:
        print(f"ERROR: {e}")
        import traceback
        traceback.print_exc()
        return 1
    finally:
        cleanup(xvfb_proc, browser_proc, ffmpeg_proc)

if __name__ == "__main__":
    sys.exit(main())
PYTHON_SCRIPT

echo '=== Script created ===' && wc -l /tmp/execution/record_browser.py && head -50 /tmp/execution/record_browser.py

Execute the screen recording script

timeout 120 python3 /tmp/execution/record_browser.py 2>&1

echo '=== Checking output ===' && ls -la /tmp/execution/*.mp4 2>/dev/null || echo 'No mp4 files found'

if [ -f /tmp/execution/nitrobutton_recording.mp4 ]; then echo '=== Video file info ===' && ffprobe -v error -show_entries format=duration,size -show_entries stream=width,height,codec_name -of default=noprint_wrappers=1 /tmp/execution/nitrobutton_recording.mp4 2>&1; fi


Copy video to working directory and create zip archive of execution folder

Explanation: The video recording was successful. Now we need to: 1) Copy the final video file to the current working directory as the main deliverable, 2) Create a zip archive of /tmp/execution containing all intermediate files and scripts, 3) Verify both files are present and show a summary.

echo '=== Creating zip archive of /tmp/execution ===' && cd /tmp && zip -r execution_archive.zip execution/ && mv execution_archive.zip "$OLDPWD/" && cd "$OLDPWD"

echo '=== Final deliverables in current directory ===' && ls -la *.mp4 *.zip 2>/dev/null

echo '=== Video preview (first frame screenshot info) ===' && ffprobe -v error -select_streams v:0 -show_entries stream=codec_name,width,height,r_frame_rate -show_entries format=duration,filename -of default=noprint_wrappers=1 ./nitrobutton_recording.mp4

echo '=== Contents of execution archive ===' && unzip -l execution_archive.zip | head -20


echo '=== Creating zip archive of /tmp/execution ===' && cd /tmp && zip -r execution_archive.zip execution/ && mv execution_archive.zip "$OLDPWD/" && cd "$OLDPWD"


=== Creating zip archive of /tmp/execution ===
  adding: execution/ (stored 0%)
  adding: execution/record_browser.py (deflated 68%)
  adding: execution/browser_nav.py (deflated 46%)
  adding: execution/nitrobutton_recording.mp4 (deflated 12%)


echo '=== Final deliverables in current directory ===' && ls -la *.mp4 *.zip 2>/dev/null


=== Final deliverables in current directory ===
-rw-r--r-- 1 root root 233211 Mar  2 08:12 execution_archive.zip
-rw-r--r-- 1 root root 260903 Mar  2 08:12 nitrobutton_recording.mp4


echo '=== Video preview (first frame screenshot info) ===' && ffprobe -v error -select_streams v:0 -show_entries stream=codec_name,width,height,r_frame_rate -show_entries format=duration,filename -of default=noprint_wrappers=1 ./nitrobutton_recording.mp4


=== Video preview (first frame screenshot info) ===
codec_name=h264
width=1280
height=720
r_frame_rate=25/1
filename=./nitrobutton_recording.mp4
duration=30.000000


echo '=== Contents of execution archive ===' && unzip -l execution_archive.zip | head -20


=== Contents of execution archive ===
Archive:  execution_archive.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
        0  2026-03-02 08:11   execution/
     7041  2026-03-02 08:11   execution/record_browser.py
      781  2026-03-02 08:11   execution/browser_nav.py
   260903  2026-03-02 08:12   execution/nitrobutton_recording.mp4
---------                     -------
   268725                     4 files


which chromium chromium-browser google-chrome firefox 2>/dev/null | head -5

which ffmpeg && ffmpeg -version 2>&1 | head -3

ffmpeg -hide_banner -formats 2>&1 | grep -i x11grab

Available fonts for text overlay

which apt apt-get dnf yum pacman 2>/dev/null | head -1

Prompt: use a browser to navigate to https://nitrobutton.com page and do a video with a length of 30 seconds with a centered watermark text orange "nitrobutton.com rulez!" plus the current date time in realtime at bottom right of the video.


All deliverables successfully created: 1) nitrobutton_recording.mp4 (260KB, 30-second video with orange centered watermark 'nitrobutton.com rulez!' and real-time timestamp at bottom right), 2) execution_archive.zip containing all execution files including the Python scripts and final video. The task is complete.