Hi Andrew,
my webcam works with given software, but its bad.
quote: The only thing we really need is trapezoid transform from capture source and some crop.
OK, and where and how can this be added to the existing system?
And: Important is good camera controll got get a very good image (Exposure? Whitebalance)....
that does not come with Hyperion yer, or am I missing some?
Marko
Update:
Got hello world (window with text) cross compiled.
(.... even here are pitfalls.. GL lib was missing... .NO FREE MEAL here )
On Ubuntu:
sudo apt-get install mesa-common-dev
sudo apt-get install libgl1-mesa-dev libglu1-mesa-dev
QT Creator does deploy my binary to my raspy.. but fails to start since its a "Gui".. how should it handle that. OK for now.
If I start the binary on a VNC desktop running on the Raspi send to by Windows PC... Hello world works.
This means: Cross compile with QT is working !...
Than I tried to start a debug session...
gdbserver was missing grrrrrrrrrr
On raspi:
sudo apt-get install gdbserver
OK....
After that debgging is still not working since it does not find shared libs...
18:51:38: Found 101 free ports.
18:51:38: Starting gdbserver...
18:51:38: Debugging starts
Listening on port 10001
Remote debugging from host 192.168.178.51
limiting remote suggested packet size (18431 bytes) to 16384
Process /opt/Test_1/bin/Test_1 created; pid = 8127
Could not load shared library symbols for 3 libraries, e.g. /usr/local/qt5pi/lib/libQt5Widgets.so.5.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
Could not load shared library symbols for 3 libraries, e.g. /usr/local/qt5pi/plugins/platforms/libqeglfs.so.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
Could not load shared library symbols for 2 libraries, e.g. /usr/local/qt5pi/plugins/egldeviceintegrations/libqeglfs-kms-integration.so.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
All the libs are there......
Anyhow. Enough for now...
Marko
UPDATE: make & make install worked after adding -skip qtwayland -skip qtlocation -skip qtscript
So, there are some modules I hopefully do not need.. when disabling them, all compiles (4 hours) AND installs.
Victory!
Thanks for your support so far.
Marko
OK...
https://mechatronicsblog.com/c…qt-5-12-for-raspberry-pi/
states.....
You can omit the compilation of problematic or time consuming modules using the -skip argument. In this case, we have omitted the compilation of the qtwayland, qtlocation and qtscript modules.
Means in configure by adding:
-skip qtwayland -skip qtlocation -skip qtscript
Will REMOVE the "problem" modules for me...
I will now CLEAN, start again with this configure:
./configure -release -opengl es2 -device linux-rasp-pi3-vc4-g++ -device-option CROSS_COMPILE=~/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- -sysroot ~/raspi/sysroot -opensource -confirm-license -make libs -prefix /usr/local/qt5pi -extprefix ~/raspi/qt5pi -hostprefix ~/raspi/qt5 -v -skip qtwayland -skip qtlocation -skip qtscript
And... wait some hours 
Marko
PS: When all works, I should try to bring the LTS to the Raspi
Oh man....
QT 5.11.3 is a pain... since old and not an official release... grrrr.
My first (known) issue is:
https://forum.qt.io/topic/7501…d-cannot-find-lclip2tri/6
Could be solved by this manual compile steps to fix missing compiles...
WORK=$PWD
cd ./qtlocation/src/3rdparty/clip2tri; make ; cd $WORK
cd ./qtlocation/src/3rdparty/clipper; make ; cd $WORK
cd ./qtlocation/src/3rdparty/poly2tri; make ; cd $WORK
Now i ran into this:
declarativemaps/qdeclarativegeomap.cpp:699:91: error: no matching function for call to ‘QDeclarativeGeoMap::connect
https://forum.qt.io/topic/9107…problem-with-qt-5-10-1/16
Also known.... realted to "older" GCC 4.x instead of 5.x (Raspi tool chain) and old verson of QT... has been fixed... but not in 5.11.3 
THAT is one of the main reasons why other use 5.12.x what is LTS (long term support).
Let me see how to get around that....
May I switch to ARM compile chain instead of Raspery tool?
Just for the files: I try to compile QT on Ubuntu for a Raspi cross compile environment....
This is NOT related to compile Hyperion.NG on the host... not there yet.
Marko
Hi, Lord Grey,
"Burning Mitnight Oil".... yes, but its mostly waiting for the compile.
Meanwhile I played online with my friends..
I often stay up very very long.
Quote: "8. Setup Qt Creator for Raspberry Pi cross compilation"
I knew and found that also and used it as basis.
I am aware of, that I have to set several things to get it running.
On the compile side:
"make" worked
make install failed....
I stopped yesterday, and have a closer look now.
Stay tuned, Marko
QT cross compile worked...
This mainreason: Mixed QT version 
Marko
Next question:
is there a elegant way to get the Hyperion source / build into QT Creator?
Is "just"
Project > Import Project > Import Existing Project
working (beside cross compile settings)
Is a "Project" file I can use?
Marko
Hi,
thanks for the advice.
I think with the right version of QT was the key. I am on track again.
The main issue for me here: I "just" want to code a new feature.. but has not been avare how complex the compile environment is.
Compile is running.... let see ....
Marko
PS: The compile of Hyperion on the Raspi worked out of the box as documented... I READ documents and love them
BUT: For development there is not a working "how to" .... yet
Hi Lord-Grey,
thanks for the information.
That is helpfull!
Overall the build environment is really a jungle with a lot of pitfalls.
Currently I try (and wait a lot) the way how QT is recommending it.
https://wiki.qt.io/RaspberryPi2EGLFS
The overseen problem from ME is that:
On Rapsi:
sudo apt-get build-dep libqt5gui5
Gets "any unknown for me" version of QT and on my PC host I try to crosscompile I explicitly downloaded: LTS qt-everywhere-src-5.12.6
My bet: They are not matching.
Currently I got much much further as in my last post, but still not full compiling.
So my NEXT step:
Check version I got on raspi and but THAT on the Ubuntu as you recomend:
To find out which Qt version is installed, run
Code:
qmake --version
I got: 5.11.3
By cross compile version is: 5.12.6
On the toolchain currently try to use the one Raspery is giving us:
git clone https://github.com/raspberrypi/tools
NOT your suggested:
https://developer.arm.com/-/me…wnloads/gnu-a/9.2-2019.12/binrel/gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf.tar.xz?revision=fed31ee5-2ed7-40c8-9e0e-474299a3c4ac&la=en&hash=76DAF56606E7CB66CC5B5B33D8FB90D9F24C9D20
On the Ubuntu I decieded to use the LTS version: 18.04... also different than yours.
So at the end of the day:
THERE ARE A LOT COMBINATIONS, that will matter .... and I have not been aware about it.
Let make a summary, what is important:
1. Raspery Pi version (I will stick to 4b, since I need horsepower) --> Here I may need use optimisation of linux-rasp-pi3-vc4-g++ since newer may not be supported yet
2. Ubuntu version (VM on PC) LTS 18.04 or newer?
3. QT version on Raspi (--> fixed by package manager) 5.11.3
4. Cross compile tool chain (https://github.com/raspberrypi/tools or ARM) ??? I will stay with the raspberrypi tool chain
My step: Clean up and restart next approach ...
Anyhow.. I take note of ALL steps I did an will finally have a way that works.
This will go into a document, I will make up...
Greeting, Marko
Hi Lord Grey,
today I started working on setting up the enviroment for full crosscompile and remote debug.
There has been some good documents how to do it.
But... all is > 1 year old and not done on Raspi 4.
you wrote:
IDE: QT Creator, as it nicely fits with the QT framework
what 5.x QT version are you using?
I try setup my build environment and run into some compile issues.
I tried "latest" (5.14)... what may not be a good idea
Beside that: for the configure step the QT configure step the build requires a device....
I have an Raspi 4... that seem not supported yet.
../qt-everywhere-src-5.14.0/configure -opengl es2 -device linux-rasp-pi3-g++ ...
So still some work to do.... before I can work on my project at all ... but cross compile and debug is an interesting concept.
Marko
Hi,
BACKGROUND
Target: Best quality Hyperion NG with working with ALL content (smart TV, streaming video etc...)
As known, a camera is "the" solution of that problem, but it is tricky.
The advanates and disadvantages has been discussed....
Since a USB camera /dev/video0 delivers this: (camera mounted at the ceiling ~1.5m away from TV)
I do not want to fix this by fancy LED configuration, what basically works.
A camera can only work in good conitions.
In my case: Dark room, no reflection, 4K HDR TV, decent USB camera (50€ class, not 5€).
That is a good starting point.
Additional "fancy" camera processing is required... a real "NG Feature"
This is not for cheap.
1. Good USB camera ( --> READY)
2. Horsepower for processing (Raspi 4) ( --> READY)
3. Dewarping of image (--> Need rectangle image as default Hyperion processing) (MISSING)
4. Full camera control (Exposure control, whitebalance, color calibration etc) (MISSING)
Good thing: All framre grabber will also benefit from that
WHAT CAN BE DONE
A Raspi 4 with a quad core ARM can do a lot.
Technical (driver, C++ code base) all is available in the open source community.
I want NO compromise on quality. In the past there has been performance bottlenecks,
but that is no longer the case .. with Raspi 4.
So, the idea is to add "native" USB camera support to Hyperion NG
Native means, a Hyperion specific "image processor" that does fix / control ANY problem of
any given /dev/video0 USB video camera or frame grabbers.
HOW CAN THIS BEE ADDED
I suggest to add a separate software module that does ALL the camera / video preprocessing.
The idea is, that it takes the /dev/videoxxx souce ( USB camera, Camera, Frame grabber).
It does all processing and delivers than the frame buffer to Hyperion as addtional video source.
WHAT CAMERA / VIDEO CONTROL IS REQUIRED
To Hyperion NG, there will be added a separate control for the camera / preprocessor
It offers the at least the following interfaces
Capture:
Exposure (only on camera devices, not on frame grabber)
Color
Geometry
Post processing
USER INTERFACE
The user interface is a separate screen in the NG interface.
It shows all of the controlls above.
For calibration / settings it may be a good idea to build a small QT live gui.
This GUI runs native on the Raspi showing a live image on the HDMI output.
A "simple" version may be done with the web interface... I have no idea how this can be done.
The user will do 3 steps:
1. Enable "Preprocessor" (instead of /dev/video... or intern)
--> This tells Hyperion NG to take the frame buffer from the video processor
2. Go to Preprocessor
--> Make default seetings (Device, format....)
--> Calibrate geometry
--> Calibrate image quality
3. Optional: Run special software to calibrate the preprocessor
DISCUSSION
That is the "plan". ,, Please coment below.
Questions:
Thanks, Marko
Hi all,
thanks for the fast answers.
Let me "compile" how you all seem to work:
1. Development (code, test, debug) is done on fat client running Ubunut. This may be a virtual machine
2. For testing, no leds are conneted to the pc, but file io or other methods are used
3. Real capture devices (or camera) can be run on the PC as video source
4. You compile x86 code for the development to run on ubuntu (guessing noboddy has ARM host)
5. Real live testing is done on Raspi....
6. For real testing compile (git update, make , make install) can be done on Raspi (takes long)
7. Cross compile on fat host save time. Flow: On Ubuntu crosscompile, than scp to Raspi, than make install & test
OK, that was the aswer I expected.
I think I will go with the Lord Grey enviroment...
OS: Ubuntu 18.10 in a VM-Ware player (I successfully compiled in Ubuntu 16 and 19, too).
IDE: QT Creator, as it nicely fits with the QT framework
GIT Repository: SmartGit
Qt app inspection: GammaRay
SQLight: DB Browser for SQLite, in case you want to update the hyperion.ng configuration DB without UI
QUESTION: Is there a documtentation, how to setup all of this?
If NO: I will try to create this how_to_develo,md
Thanks Marko
Hi Michael,
ich hatte von Deiner Änderung gelesen (pull request) , aber wenn ich das korrekt versteh werden noch "nur" die LED Koordinaten umgerechnet, oder?
Meine Annahme war, dass dann die automatischen Randerkennung nicht korrekt funktioniert.
Falls der Trapezoid schon das Bild korrigiert... cool!
Testen will ich das auf jeden Fall. In der Anlage eines Screenshots von meine TV... ist 75" 4K.
Wie finde ich den Branch, bzw kannst mir einen Links schicken?
Aber zu meiner Frage: Wie entwickelst Du? Auf dem Raspi?
Ich glaub ja kaum, das man den C-code im Editor hackt und dann make macht... oder?
Danke Marko
Hi,
just did it.
Worked out of the box, no special setup.
The only issue was that the IO connector has more pins, so I did not use the right SPI pins.
After figuring out, all works fine.
Marko
Hi,
I am from Germany and just trieded Hyperion out of the box... with USB camera.
Worked good so far...
Since there is still the open issue of "trapez distortion" comming from USB cam filming the screen.
Long story short: I would like to work on that.... on the NG.. but do not know how...
I have some experience with embeded software, but have not done linux SW development stuff.
...but have some long Linux user experience (engineer), so I know what bash, ssl, vnc... deamon, vi etc. is
What I have done so far:
At home I have a Windows PC... with VM for Linux on demand.
I had a first look to the C++ code of the NG and would like to "play" with it.
My goal: Add good configurabel usb camera support to NG.
Why:
I want to use my smart TV as is with out 4K, HDR, protection issues. I think a camera is the right way to go.
Will it be good? Hopefully I can add as much image processing to get a good result.. the Raspi 4 has horepower...
So my questions:
How do YOU develope the Hyperion NG software?
I did already spend 1/2 day of playing around, but that is not efficient.
What is the best environment... ?
I managed to download all source and was able to build it on thr Raspi 4... took just one hour.
I need a "super charge" by of one of you how to start.... I will figure out the rest..
Does someone has as VM that includes all I / we need?
Thanks Marko
PS: I love Hyperion!
Hi,
....ist lange her, dass hier was passiert ist.
Wegen dem ganzen 4k hdr drm netflix Mist stehe ich nun hier.
Das Kameraproblem sollte doch lösbar sein?
Noch jemand dran?
Danke Marko
