[ADVICE]. WHICH is the BEST choice for video buffer and display method?

esys9999 · wrote on 15 Mar 2016, 03:50

Dear all embedded professional,
I would like to get video frame buffer and display on LCD screen.
How data transfer method that is the best choice for video buffer and display in my case?
I have a plan to use PIPE method. I use 2 pipes, one for data (video) frame transfer and one for controlling commands.
My platform is a KIT using DSP (DM3730, Arm cortex A8). Linux distro built based on Yocto Project.
The block diagram like this:

Camera --> DSP kit (Yocto Linux OS)--> LCD touch-screen.

Thank you very much!

SGaist · wrote on 15 Mar 2016, 22:16

Hi and welcome to devnet,

You question's not really clear, are you searching for advices on how to do it with Qt or just in general ? If the former, you'll be interested by the QtMultimedia module.

esys9999 · wrote on 16 Mar 2016, 07:47

Dear sir,
I would like to know How to do it with Qt (Use which module?)
I wanna get the data (video frame buffer) which is processed by DSP and then display it on Qt application form.

Thank for your reply sir!

SGaist · wrote on 16 Mar 2016, 22:29

Like I wrote, QtMultimedia would be a starting point.

Do you already have an API to get these DSP processed video frame buffer ?

esys9999 · wrote on 17 Mar 2016, 01:22

Thank your sir!
I'm going to discover QtMultimedia module on Qt 4.7

SGaist · wrote on 17 Mar 2016, 20:45

4.7 ? Then you will have to take a look at the Qt Mobility module.

If you are locked to the Qt 4 series, please upgrade to at least 4.8.7. If not locked then consider using Qt 5.6.0 which just got released and is LTS.