C++ & Qt

02 March 2026 10:45

https://treelinev1.devpost.com/ anyone wants to team up for this,dm....

C++ & Qt

01 March 2026 02:24

It's been a while, I've managed to solve that, thanks anyway

C++ & Qt

28 February 2026 17:34

Good explanation, thanks!

C++ & Qt

28 February 2026 11:18

Qt’s maintainers have repeatedly clarified:

Qt is not an acronym and has no full form. It is a trademark with upper case 'Q' followed by a lower case 't'

The name was chosen to be short, distinctive, and pleasant-sounding - hence the pronunciation “cute.”

C++ & Qt

28 February 2026 11:16

“Q” as a Prefix

One of Qt’s original creators, Haavard Nord, used the letter Q as a prefix in his internal class library before Qt existed.

When Qt was being developed at Trolltech (the original company behind Qt), they continued using Q as a naming convention.

That’s why many Qt classes start with Q (e.g., QObject, QWidget, QString).

C++ & Qt

27 February 2026 10:05

What is qt, can anyone explain in detail?

C++ & Qt

25 February 2026 22:23

@Ilya_6483 [8547462020] warned (2 of 2).
• Action: Banned 🚷

C++ & Qt

25 February 2026 20:35

the sender is an 4th 5th raspberry or jetson orin nano

C++ & Qt

25 February 2026 20:28

thanks for valuable advice!

C++ & Qt

25 February 2026 20:22

may be you think this is neglible, but maintainance cost is also better that way. you can enchant your lib with the update of other module

C++ & Qt

25 February 2026 20:14

just my advice 🎉. I dont have experience, just some observation of possible steps

C++ & Qt

25 February 2026 20:12

another more concrete example : obs studio — twitch

C++ & Qt

25 February 2026 15:06

hello guys! long time no see!

so i am developing a bit of realtime video streaming client. the rtp and encoding are already handled by the uvgrtp and libav

i have other implementation that is based entirely on gstreamer pipeline (gst.h), that is a lot of a heck easier


i want to show the raw frame buffer (packed rgb or planar yuv 4:2:0) to the user efficiently. i have implemented the qpixmap label thing but it involves a lot of data duplication and in general does not seem professional to me. i am planning to use the opengl widgets integration so my question is: is there some ready-to-use reatime-video-display widgets to put pixels on the screen efficiently from memory?

i tried to investigate the docs qvideowidget thing but i was not able to understand how to pass my own raw data pointer to qvideoframe.

maybe someone have done something simmiral in qt already and could provide some directions?

C++ & Qt

23 February 2026 18:15

But yes - when you're learning these, writing test programs that use the STL algorithms available - benchmarking them to see how they work does help a lot to understand.

C++ & Qt

23 February 2026 18:12

Yes — I was doing a Qt 6 porting effort for Renderdoc a few weeks ago - and RenderDoc has its own string class (rdcstr) with cast operators between it and QString.

In Qt 6, QString went from being internally stored as UTF-8 to being stored as UTF-16, which made conversions more expensive, so I didn't want to make the conversions between QString and rdcstr implicit (plus, the compiler kept giving me ambiguous overload selection errors).

So — to make all of the conversions explicit, I needed to modify a *LOT* of code, and not something I could craft a regex to do. GenAI was a real big help here.

C++ & Qt

02 March 2026 09:20

Welcome to the group, @Le_Burrito! :-)

Wanna share your story of how you started with Qt, QML or C++? Maybe some nice feature that made you stick with it.
Rules are set on the description of the group. :)

C++ & Qt

01 March 2026 02:24

Everything in 3d is calculated (mostly) as vec4, mat4. In html/qml it's not your concern but in custom -- should copy past some boilerplate-repetitive template code

C++ & Qt

28 February 2026 11:30

If you have commercial Qt license, you can go for the LTS version Qt 6.8.5 or Qt 6.8.6.

If using open source pre-built libraries, then 6.9.4 and above.

These library versions support latest Android requirement: 16KB page size alignment: https://developer.android.com/guide/practices/page-sizes

For compatible NDK, JDK and Gradle versions, refer to the respective version's platform support page.

C++ & Qt

28 February 2026 11:16

The “t” from Xt (X Toolkit)

Early versions of Qt were built on top of the Xt (X Toolkit Intrinsics) framework used in the X11 windowing system on Unix.

The “t” in Qt is commonly attributed to Toolkit, influenced by Xt.

So the name “Qt” loosely reflected:
- Q (their internal prefix)
- t (from Toolkit / Xt)

C++ & Qt

28 February 2026 03:22

Welcome to the group, @hamid914! :-)

Wanna share your story of how you started with Qt, QML or C++? Maybe some nice feature that made you stick with it.
Rules are set on the description of the group. :)

C++ & Qt

26 February 2026 03:38

someone is also having a boring evening today

C++ & Qt

25 February 2026 20:36

reciever is the big old x86

C++ & Qt

25 February 2026 20:32

btw, already noted this a few times before, why people always think of embedded device as of something
in
out
cpu-realmode level :D

it's full system, from grub-loader to linux-kernel, drivers for devices at bus, and gnome(so you even can configure it with hands in UI !!!). tho it may start 1 APP full-screen...

C++ & Qt

25 February 2026 20:26

I assume your qt runs at PC, maybe in your mini-linux-distributive with qt as in some embedded device. so access to qt you already have, you MUST not to tweak with mesa, etc. have to use simple approach — system starts your app fullscreen, etc.... just as normal app

cant imagine why you may think about opengl in encoding of stream-packet

C++ & Qt

25 February 2026 20:20

so heavily recommend to use existing API. if license is fine — best way is too hook to obs studio. has already all you may need. (by hook I mean — just compile into your project .obj that you need. but I'm sure there're public API, docs, and headless version)

C++ & Qt

25 February 2026 20:13

should not think through implementation theory. will solve task but not efficient. best to use/hook into already polished API, check the docs. github libs (including heavily qt-oriented but the only main part of the gears are Gather(in any way, may be capture dx-surface every 1/4 sec)-Cache with delay-Encoding-Send-Decode-Show with preloaded timeline optionaly(in any way may draw img as texture, may use qt-widget))

C++ & Qt

25 February 2026 20:10

should not work with pixels/redo everything, should work with packed cadr-S (img at timeline). there're already open-source solutions

example — any popular web-video platform

C++ & Qt

25 February 2026 12:10

Куплю USDT TRC20. Без посредников.

C++ & Qt

23 February 2026 18:14

I would contend that theoretic is what you need — to understand the time complexity and space complexity of different algorithms (Big-O in particular).

C++ & Qt

23 February 2026 18:12

About algorithms, which is really vital, STL gives you a bunch of good ones, but you can enhance your skills by dealing with related exercises or problems.

Benchmark each and do not expect better results just by knowing them.