Starting Indi server failure

[bilsencode]

It seems that I have installed everything mentioned in the README.md, but I still get the following error when trying to start the server:

Driver ./indi_pylibcamera.py: execlp: No such file or directory

Any idea what I might be missing?

---

cd ~/Projects/indi_pylibcamera
indiserver -v ./indi_pylibcamera.py
2025-05-16T20:31:06: startup: indiserver -v ./indi_pylibcamera.py
2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: pid=7689 rfd=3 wfd=6 efd=7
2025-05-16T20:31:06: listening to port 7624 on fd 4
2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: 2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: execlp: No such file or directory
Child process 7689 died
2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: stderr EOF
2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: restart #1
2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: pid=7690 rfd=0 wfd=6 efd=7
2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: 2025-05-16T20:31:06: Driver ./indi_pylibcamera.py: execlp: No such file or directory

---

pi@indiCam:~ $ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 11 (bullseye)"
NAME="Raspbian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"
pi@indiCam:~ $ uname -a
Linux indiCam 6.1.21-v7+ #1642 SMP Mon Apr 3 17:20:52 BST 2023 armv7l GNU/Linux
pi@indiCam:~ $ apt list --installed | grep numpy

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

python3-numpy/oldstable,now 1:1.19.5-1 armhf [installed]
pi@indiCam:~ $ apt list --installed | grep astropy

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

python3-astropy/oldstable,now 4.2-6 armhf [installed]
python3-pytest-astropy-header/oldstable,now 0.1.2-3 all [installed,automatic]
python3-pytest-astropy/oldstable,now 0.8.0-1 all [installed,automatic]
pi@indiCam:~ $ apt list --installed | grep libcamera

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

libcamera-apps/oldstable,now 1.2.1-1 armhf [installed]
libcamera0/oldstable,now 0git20230720+bde9b04f-1 armhf [installed,automatic]
python3-libcamera/oldstable,now 0git20230720+bde9b04f-1 armhf [installed,automa tic]
pi@indiCam:~ $ apt list --installed | grep picamera

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

python3-picamera2/oldstable,now 0.3.12-2 all [installed]
pi@indiCam:~ $ libcamera-hello --list-cameras
Available cameras

0 : imx477 [4056x3040] (/base/soc/i2c0mux/i2c@1/imx477@1a)
Modes: 'SRGGB10_CSI2P' : 1332x990 [120.05 fps - (696, 528)/2664x1980 crop]
'SRGGB12_CSI2P' : 2028x1080 [50.03 fps - (0, 440)/4056x2160 crop]
2028x1520 [40.01 fps - (0, 0)/4056x3040 crop]
4056x3040 [10.00 fps - (0, 0)/4056x3040 crop]

pi@indiCam:~ $ indi_pylibcamera_print_camera_information
Testing numpy:
numpy 1.19.5

Testing astropy:
astropy 4.2

[5:15:22.417077314] [7500] INFO Camera camera_manager.cpp:297 libcamera v0.0.5+ 83-bde9b04f
[5:15:22.474827082] [7501] INFO RPI vc4.cpp:437 Registered camera /base/soc/i2c 0mux/i2c@1/imx477@1a to Unicam device /dev/media0 and ISP device /dev/media1
[5:15:22.475018383] [7501] INFO RPI pipeline_base.cpp:1101 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml'
Found 1 cameras.

Camera 0:
{'Id': '/base/soc/i2c0mux/i2c@1/imx477@1a',
'Location': 2,
'Model': 'imx477',
'Rotation': 0}

[5:15:22.479489691] [7500] INFO Camera camera_manager.cpp:297 libcamera v0.0.5+ 83-bde9b04f
[5:15:22.534963545] [7504] INFO RPI vc4.cpp:437 Registered camera /base/soc/i2c 0mux/i2c@1/imx477@1a to Unicam device /dev/media0 and ISP device /dev/media1
[5:15:22.535161564] [7504] INFO RPI pipeline_base.cpp:1101 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml'
Camera properties:
{'ColorFilterArrangement': 0,
'Location': 2,
'Model': 'imx477',
'PixelArrayActiveAreas': [(8, 16, 4056, 3040)],
'PixelArraySize': (4056, 3040),
'Rotation': 0,
'ScalerCropMaximum': (0, 0, 0, 0),
'SystemDevices': (20749, 20750, 20738, 20739, 20740),
'UnitCellSize': (1550, 1550)}

Raw sensor modes:
[5:15:22.557817268] [7500] INFO Camera camera.cpp:1033 configuring streams: (0) 640x480-XBGR8888 (1) 1332x990-SBGGR10_CSI2P
[5:15:22.558605333] [7504] INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1 /imx477@1a - Selected sensor format: 1332x990-SBGGR10_1X10 - Selected unicam for mat: 1332x990-pBAA
[5:15:22.580723646] [7500] INFO Camera camera.cpp:1033 configuring streams: (0) 640x480-XBGR8888 (1) 2028x1080-SBGGR12_CSI2P
[5:15:22.581478378] [7504] INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1 /imx477@1a - Selected sensor format: 2028x1080-SBGGR12_1X12 - Selected unicam fo rmat: 2028x1080-pBCC
[5:15:22.611233331] [7500] INFO Camera camera.cpp:1033 configuring streams: (0) 640x480-XBGR8888 (1) 2028x1520-SBGGR12_CSI2P
[5:15:22.611996657] [7504] INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1 /imx477@1a - Selected sensor format: 2028x1520-SBGGR12_1X12 - Selected unicam fo rmat: 2028x1520-pBCC
[5:15:22.650065951] [7500] INFO Camera camera.cpp:1033 configuring streams: (0) 640x480-XBGR8888 (1) 4056x3040-SBGGR12_CSI2P
[5:15:22.650829225] [7504] INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1 /imx477@1a - Selected sensor format: 4056x3040-SBGGR12_1X12 - Selected unicam fo rmat: 4056x3040-pBCC
[{'bit_depth': 10,
'crop_limits': (696, 528, 2664, 1980),
'exposure_limits': (31, None),
'format': SRGGB10_CSI2P,
'fps': 120.05,
'size': (1332, 990),
'unpacked': 'SRGGB10'},
{'bit_depth': 12,
'crop_limits': (0, 440, 4056, 2160),
'exposure_limits': (60, 667244877, None),
'format': SRGGB12_CSI2P,
'fps': 50.03,
'size': (2028, 1080),
'unpacked': 'SRGGB12'},
{'bit_depth': 12,
'crop_limits': (0, 0, 4056, 3040),
'exposure_limits': (60, 674181621, None),
'format': SRGGB12_CSI2P,
'fps': 40.01,
'size': (2028, 1520),
'unpacked': 'SRGGB12'},
{'bit_depth': 12,
'crop_limits': (0, 0, 4056, 3040),
'exposure_limits': (114, 674191602, None),
'format': SRGGB12_CSI2P,
'fps': 10.0,
'size': (4056, 3040),
'unpacked': 'SRGGB12'}]

Camera configuration:
{'buffer_count': 4,
'colour_space': <libcamera.ColorSpace 'sYCC'>,
'controls': {'FrameDurationLimits': (100, 83333),
'NoiseReductionMode': <NoiseReductionModeEnum.Minimal: 3>},
'display': 'main',
'encode': 'main',
'lores': None,
'main': {'format': 'XBGR8888',
'framesize': 1228800,
'size': (640, 480),
'stride': 2560},
'queue': True,
'raw': {'format': 'SBGGR12_CSI2P',
'framesize': 18580480,
'size': (4056, 3040),
'stride': 6112},
'transform': <libcamera.Transform 'identity'>,
'use_case': 'preview'}

Camera controls:
{'AeConstraintMode': (0, 3, 0),
'AeEnable': (False, True, None),
'AeExposureMode': (0, 3, 0),
'AeMeteringMode': (0, 3, 0),
'AnalogueGain': (1.0, 22.2608699798584, None),
'AwbEnable': (False, True, None),
'AwbMode': (0, 7, 0),
'Brightness': (-1.0, 1.0, 0.0),
'ColourGains': (0.0, 32.0, None),
'Contrast': (0.0, 32.0, 1.0),
'ExposureTime': (114, 674191602, None),
'ExposureValue': (-8.0, 8.0, 0.0),
'FrameDurationLimits': (100000, 694434742, None),
'NoiseReductionMode': (0, 4, 0),
'Saturation': (0.0, 32.0, 1.0),
'ScalerCrop': ((0, 0, 64, 64), (0, 0, 4056, 3040), (2, 0, 4053, 3040)),
'Sharpness': (0.0, 16.0, 1.0)}

Exposure time:
min: 114, max: 674191602, default: None

AnalogGain:
min: 1.0, max: 22.2608699798584, default: None

[scriptorron]

The "execlp" error comes when the indiserver does not find the driver. Have you really installed it according to the instructions in the README.md? I am surprised that you have a folder ~/Projects/indi_pylibcamera. If you followed the installation instructions and activated the virtual environment you can start the server with:

indiserver -v indi_pylibcamera

Please note that the driver name has no .py name extension.

[bilsencode]

Thanks for the tip – after a complete reinstallation of Raspberry Pi OS Bookworm (instead of Bullseye), it’s working now.

The crucial tip is: use indi_pylibcamera without .py – in other words, do not follow the installation instructions in the Wiki, but only the instructions in the README.md! This was my mistake.
Otherwise, it leads to inconsistencies.

[scriptorron]

Oh, you are right: the Wiki is not uptodate. I will remove the installation instructions from the Wiki. The README.md gets updates and will contain the latest instructions.