Preview issue on arm64 system

[laheller]

@tjacquin @vidma @dbainbridge @agnunez @ckuethe

Hi!

I am using Ubuntu Mate 20.04.2 LTS (Focal Fossa) 64-bit installed on Raspberry PI 4B, 8GB model.

By extending Makefile with the below section I was able to compile and install allsky:

ifeq ($(platform), aarch64)
	OPENCV = $(shell pkg-config --cflags opencv4) $(shell pkg-config --libs opencv4)
	CC = g++
	AR= ar
	CFLAGS += -march=native -mtune=generic
	DEFS += -DOPENCV_C_HEADERS
	ZWOSDK = -Llib/armv8 -I./include
endif

However when I tried to run it via commandline in "preview" mode, I got following error:

laheller@laheller-desktop:~/Downloads/allsky$ ./allsky.sh preview

Making sure allsky.sh is not already running...
can't get debug descriptor: Resource temporarily unavailable
Trying to automatically choose between ZWO and RPI camera
ZWO camera found. Choosing ZWO
Settings check done
CAMERA: ZWO
CAMERA_SETTINGS: /home/laheller/Downloads/allsky/settings_ZWO.json
Starting allsky camera...

 ******************************************
 *** Allsky Camera Software v0.7 | 2020 ***
 ******************************************

Capture images of the sky with a Raspberry Pi and an ASI Camera

Add -h or -help for available options 

Author: Thomas Jacquin - <jacquin.thomas@gmail.com>

Contributors:
-Knut Olav Klo
-Daniel Johnsen
-Yang and Sam from ZWO
-Robert Wagner
-Michael J. Kidd - <linuxkidd@gmail.com>
-Chris Kuethe


Listing Attached Cameras:
- 0 ZWO ASI120MC-S

ZWO ASI120MC-S Information:
- Resolution:1280x960
- Pixel Size: 3.8μm
- Supported Bin: 1 2 
- Color Camera: bayer pattern:GR
- SDK version 1, 19, 0, 0
- Initialise Camera OK
- Sensor temperature:29.000000

Capture Settings: 
 Image Type: ASI_IMG_RGB24
 Resolution: 1280x960 
 Quality: 95 
 Exposure: 200ms
 Max Exposure: 20000ms
 Auto Exposure: 1
 Gain: 50
 Max Gain: 200
 Cooler Enabled: 0
 Target Temperature: 0C
 Auto Gain: 0
 Brightness: 50
 Gamma: 50
 WB Red: 53
 WB Blue: 90
 Binning: 1
 Delay: 10ms
 Daytime Delay: 5000ms
 USB Speed: 40
 Text Overlay: Hello
 Text Extra Filename: 
 Text Extra Filename Age: 0
 Text Line Height 30px
 Text Position: 15px left, 30px top
 Font Name:  0
 Font Color: 255 , 255, 255
 Small Font Color: 0 , 0, 255
 Font Line Type: 16
 Font Size: 7.0
 Font Line: 1
 Outline Font : 0
 Flip Image: 0
 Filename: images/image.jpg
 Latitude: 48.06N
 Longitude: 17.36E
 Sun Elevation: -6
 Preview: 1
 Time: 0
 Darkframe: 0
 Show Details: 1
 Debug Level: 0

Starting daytime capture
Saving auto exposed images every 5000 ms

Press Ctrl+C to stop

terminate called after throwing an instance of 'cv::Exception'
  what():  OpenCV(4.2.0) ../modules/core/src/array.cpp:2492: error: (-206:Bad flag (parameter or structure field)) Unrecognized or unsupported array type in function 'cvGetMat'

./allsky.sh: line 86: 10495 Aborted                 (core dumped) $ALLSKY_HOME/capture $ARGUMENTS

Not sure, whether this is a serious issue but just to be sure I am reporting it.

BR,

Ladislav

[ckuethe]

Well, you compiled it right, but I run my allsky camera headless and just use the web UI for viewing the current image.

[EricClaeys]

@laheller The "preview" option doesn't work over VNC and probably over other remote control programs on a Pi. It DOES work when logged in directly on the Pi. Perhaps that's the same on your PC?

[laheller]

@laheller The "preview" option doesn't work over VNC and probably over other remote control programs on a Pi. It DOES work when logged in directly on the Pi. Perhaps that's the same on your PC?

@EricClaeys
Yes, I tried it via xrdp remote desktop. But will connect RPI directly to display via HDMI and report.

[laheller]

@EricClaeys

Update: Tried it using my RPI connected directly to display via HDMI cable.
The result is the same, command ./allsky.sh preview gives an error.
From the error message I don't think that the problem is with the remote desktop because it clearly says that it's an OpenCV4 issue.

[linuxkidd]

This is likely due to PR #507 ...

NOTE: I had quite a bit of issue getting the Display() function to compile, but finally got something workable -- although, I've not tested the Display capability. I would love for someone to test the Display code prior to merge. Otherwise, the rest of the code compiles fine on both Raspberry Pi OS based on Debian Buster with OpenCV 3.2.0, as well as Debian Bullseye with OpenCV 4.5.1.

Sounds like there are some changes needed to the Display() function..

[laheller]

@linuxkidd @EricClaeys

I just recloned the repo and installed again allsky.
Now I have different error on ./allsky.sh preview command:

[EricClaeys]

@laheller, I got it to work on my Pi when logged in via keyboard and monitor using the attached file. There was a bug in the code.
capture.cpp.txt
.

[laheller]

@laheller, I got it to work on my Pi when logged in via keyboard and monitor using the attached file. There was a bug in the code. capture.cpp.txt .

@EricClaeys
Perfect! With your changes the preview works fine!

However there is still one error which appears at all captured image at least in the console:
/home/laheller/Letöltések/allsky/scripts/darkCapture.sh: line 12: printf: 25.2: invalid number

Just checked the mentioned line in darkCapture.sh and there is:
TEMPERATURE=$(printf "%2.0f" "$(< ${TEMPERATURE_FILE})")

[EricClaeys]

@laheller please make sure your "locale" is set correctly. That should fix the problem.

[laheller]

@laheller please make sure your "locale" is set correctly. That should fix the problem.

@EricClaeys
Can I set the locale directly in darkCapture.sh ?

Update:
Yes, it's fixed by adding the below line at the beginning of darkCapture.sh:
LC_NUMERIC=C.UTF-8

[EricClaeys]

@laheller, you should set Locale in the WebUI, near the bottom of the page. It's used by more than just darkCapture.sh.