Cross Compile with QT for raspberry pi

[ben80]

Hello, i just came across mdk-sdk and it might be what i am searching for a long time.
Currently i am displaying videos on a raspberry pi with hardware aceleration and would like to replace the "video tools" that i am using.
I cross compiled qt5 for raspberry pi and use POT (Link) to show the video. Unfortunately this is not very stable. Could someone answer my following questions :

• Can i cross-compile mdk-sdk with QT for raspberry pi?
• Can i use QTs qml code to play videos?
• Will it show videos hw accelerated (no sound needed)?
• does it work with qt5 and/or qt6?

Thanks a lot
Ben

[wang-bin]

download mdk-sdk-linux.tar.xz and extract it, include $MDK_SDK_DIR/mdk-sdk/lib/cmake/FindMDK.cmake or $MDK_SDK_DIR/mdk-sdk/mdk.pri in your cmake or qmake project, then you should be able to build your project, cross or native compile.

qml examples can be found here.

hw accelerated decoding and rendering are supported, delete libffmpeg.so.* in mdk-sdk to use system ffmpeg to support h264, hevc hardware decoder, use opengl es2/3 to support 0-copy rendering.

both qt5 and 6 are supportd.

[ben80]

Thanks a lot, sounds great. I will look into it.
Do I use the same files on my host-pc and also on the raspberry pi? Sorry if this is a dummy question. I am always confused when cross compiling.
And do i need to cross compile ffmpeg as well or basically find the right sources/binaries for my host-pc and also for the raspberry pi?

[wang-bin]

for linux, you can use the same package mdk-sdk-linux.tar.xz, it contains 3 cpu archtectures: x86_64(amd64), arm64, armhf. cmake and qmake should find out the right one. when deploying, you have to copy at least libmdk.so.0 in mdk/lib/${cpu}. libffmpeg.so.* is also there, you can also use system installed ffmpeg(version >=4.4) by deleting libffmpeg.so.*. there is a libc++.so.1, you can use the one in system or installed by package manager.