mmal (buffer header callback not defined) about raspberry-pi-os-64bit HOT 7 OPEN

Raspberry Pi 4B
Pi Camera v2

I get inconsistent performance from Raspistill and using the PiCamera module to take photos, with the same error;

mmal: mmal_port_event_send: event lost on port 1,0 (buffer header callback not defined)

The Pi fails to save pictures around 40% of the time. The other 60% it states the error, but still saves the photo correctly.

Hopefully this gets addressed as the camera functionality is core for many Pi users.

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HI,

I'm facing the same issue.

Raspberry 4 B
Pi Camera 1.3

output is the same as @openbsod shared - except I have:

[...]

Camera Name ov5647
Width 2592, Height 1944, filename picture.jpg
Using camera 0, sensor mode 0

[...]

from raspberry-pi-os-64bit.

ov5647 simply indicates Camera Module v1 https://www.raspberrypi.org/documentation/hardware/camera/README.md

from raspberry-pi-os-64bit.

Hi,
with my
Raspberry Pi 4 Model B Rev 1.4,
Raspberry Pi Camera Board V2
I'm facing the same issue,
output is the completely same as @openbsod shared from the top.

Creating jpg image with "rasptstill" command always fail,
When I try to open the image file, the following error message is displayed:
Error interpreting JPEG image file (Not a JPEG file: starts with 0x90 0x9f)

Also, creating image with following python script, displays same error message:
mmal: mmal_port_event_send: event lost on port 1,0 (buffer header callback not defined)

But this time the correct image file is always created.

from picamera import PiCamera
from time import sleep

camera = PiCamera()
camera.rotation = 180
camera.capture('/home/pi/Desktop/image.jpg')

+) Added
I found that image is properly created only when the image size is small.
To check this, design the camera to take a simple picture (for example, a piece of paper or a finger at close range), then shoot the camera.

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I found the other helpful link.
https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=276821&p=1677135&hilit=buffer+header+callback+defined#p1677135
it says:

MMAL is not supported on 64bit at the moment

At the bottom of the page it says:

Please post feedback questions on RPiOS64 here: viewtopic.php?f=63&t=275372 and nowhere else

Who manages this Raspberry-Pi-OS-64bit github page?

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Any news on this?

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Duplicate of raspberrypi/userland#688

Placeholder so that people can be made aware that MMAL is currently NOT SUPPORTED on 64 bit userland systems

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