macOS screen capture example not work

[zak-45]

Hi,
I want to do a screen capture from a macOS. So, read doc, follow the example, but this one do not work and always provide this error:

av.error.BlockingIOError: [Errno 35] Resource temporarily unavailable: '0'; last error log: [avfoundation] bgr0

This is the script, I just have added option probesize to see if this help but erorr still there:

import av

av.logging.set_level(av.logging.VERBOSE)

input_ = av.open("0", format="avfoundation", options={'probesize':'100M'})
output = av.open("out.mkv", "w")

output_stream = output.add_stream("h264", rate=30)
output_stream.width = input_.streams.video[0].width
output_stream.height = input_.streams.video[0].height
output_stream.pix_fmt = "yuv420p"

try:
    for frame in input_.decode(video=0):
        packet = output_stream.encode(frame)
        output.mux(packet)
except KeyboardInterrupt:
    print("Recording stopped by user")

packet = output_stream.encode(None)
output.mux(packet)

input_.close()
output.close()

Working on macOS 13 ventura, python 3.9, av 14.1.0

zak@zaks-Mac pip3 list
Package Version
altgraph 0.17.2
future 0.18.2
macholib 1.15.2
numpy 2.0.2
opencv-python 4.11.0.86
pip 21.2.4
pyav 14.1.0
setuptools 58.0.4
six 1.15.0
wheel 0.37.0

thanks

[WyattBlue]

This should your blocking error:

try:
    while True:
        try:
            for frame in input_.decode(video=0):
                packet = output_stream.encode(frame)
                output.mux(packet)
        except av.BlockingIOError:
            pass
except KeyboardInterrupt:
    print("Recording stopped by user")

packet = output_stream.encode(None)
output.mux(packet)

input_.close()
output.close()

[zak-45]

Thanks !