Raspberry Pi Forums

topguy

Two ways: ( I'm assuming that the IP-Camera has its web interface on standard HTTP port 80 ) A; Create a port forwarding rule on the pi with iptables. So then if you use http://10.8.0.3:8080 from the PC it gets forwarded to 192.168.1.64:80 Maybe something like this... ( iptables are HARD to understa...

topguy

If systemd logging is enabled you can inspect logs from previous boot by using this command.

Code: Select all

journalctl -b -1

Since you had to do a power-cut there is a chance the logs could be corrupted..

topguy

Neither their web-page or github contain pre-compiled packages for ARM/Raspbian as far as I can see.

topguy

In my experience its a good idea to mention which country you are in.
Do you have requirements to physical size or enviromental factors ?

topguy

We would need a link to a guide you followed or for you to show *how* you installed everything. Python is a bit tricky since it matters if you install the modules as system modules or just for a specific user or if you are using virtual environments or not. Typical errror like using "pip" ...

topguy

Using an Android smartphone app ( NXP TagInfo ) to identify what kind of tags work which don't, would be helpful.

topguy

But what kind of machine is it going to be an external monitor to ? Does that machine have its own display ? Do you want the "external monitor" to show a copy of what is showing on the other screen or behave as an extended desktop. Not many systems I know that would support such a thing ( ...

topguy

Why would there be a Chromium desktop on your Pi ?
I dont remember there being a chromium desktop as part of RecalBox.. but its been a while since I tested it..
You change the SD card to change the OS.

topguy

In my opinion "dd" is still usable for your scenario, but you will have to wait for the copy of the whole 64GB regardless of how much data is in the partition. You have the option to shrink the partition on the "from" stick before dd'ing just enough data ( using "bs" an...

topguy

I gave it the name "shutdown". What exactly do you mean by "gave it the name" ? Did you label the filesystem on the drive ? Anything on the driver is not part of the USB information available to udev. To list USB information you use "lsusb -v" example using a random me...

topguy

This is a very old guide, but maybe it still works or can give you hints about what to google....

https://stackoverflow.com/questions/442 ... vice-match

topguy

The concept of "overscan" comes from CRT displays and how much overscan it has varies a *lot*. Some TVs had service menus where you could manipulate this. Have you tested uncommenting these lines: #overscan_left=16 #overscan_right=16 #overscan_top=16 #overscan_bottom=16 I would consider en...

topguy

Which model of Pi is your Pi ?
Are your OS up to date ?

There is no ARM/Linux build of blender in that link you posted.

An earlier thread:
viewtopic.php?t=290509

I would suggest trying the standard install first:

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sudo apt install blender

topguy

Do you mean:
How to set the icon of application on the start-bar at the bottom ?
or
How to set the icon of a shortcut on the desktop that you click to start the application ?

topguy

In general Linux audio is a mess.. There are usually multiple sound APIs to choose from but not all of them might be configured correctly.. I can see pyAudio going trough "ALSA", "PulseAudio" and "Jack" looking for some audio hardware and that is what is causing all the...

topguy

Googling the error brought me back here:
viewtopic.php?t=323547

topguy

Can you provide a link to the guide you are following ? libcamera-vid: symbol lookup error: /lib/arm-linux-gnueabihf/libcamera_app.so: undefined symbol: _ZNK9libcamera11ControlList8containsERKNS_9ControlIdE Does the application exit after printing this error ? Its weird if you have a mismatch betwee...

topguy

Meanwhile I found out: Older photos in JPG format have no problems. They are displayed as expected. It is probably due to the resolution. My old photos have a resolution of 2.4 mega pixels, the new ones of 20 mega pixels. Is there anything I can do to the Raspi's settings to cope with the higher re...

topguy

Is there an alternative to printf in C?

write()

topguy

HTML/CSS/Javascript all run on the client side. Grabbing the picture from the camera needs to happen on the server side so you need code that runs there. There are commonly two methods for that, CGI and PHP. ( https://httpd.apache.org/docs/2.4/howto/cgi.html ) CGI programs/scripts can be written in ...

topguy

If the camera has a 1/30s shutter speed and screen refresh is 60fps and game is running > 60fps the camera will be exposed to *two* frames.

But maybe the screen just has really bad LCD refresh times ( I mean it says LG

), is it a Monitor or really a TV ?

topguy

Having FPS higher than screen refresh rate should normally give tearing and not ghosting..
may be worth checking what resolution and refreshrate Ubuntu thinks your screen have..

Test on different display.

topguy

None of those sources are official ones, they have been manually added to your system... Also "jessie" ( Debian 8 ) was originally released in 2015 and is getting pretty old.. support might be dropped.. You can just remove those entries from the registered apt-sources and the errors should...

topguy

- test with a powered and maybe also an unpowered USB hub..
- buy a new modem..

topguy

I'm almost certain that OpenCV uses SLD2
https://caveofprogramming.com/guest-pos ... e-sdl.html

Raylib might also be a possible candidate:
https://github.com/raysan5/raylib/blob/ ... ocessing.c

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