How to run BMP files using Linux yocto on STM32MP157C-DK2 board

[Smedi]

Hi,

I have STM32MP157C-DK2 board and I am running Linux Yocto on it.Now I want to run my own BMP files on the board but I am not getting how to do this. Can anyone help me the procedure to run this.

Regards

Srikanth.

[Olivier GALLIEN]

Hi @Smedi​ 

What do you mean by "run my own BMP files" ? Please clarify.

Olivier

[Smedi]

Hi olivier,

Thanks for reply. I mean I want to display my bmp files on the screen. I want to know how to do that.

Regards

Srikanth.​

[Calvin Ageneau]

Hi @srikanthmedisetty1.5616173611852678E12 (Community Member)​ 

To display your BMP file on the DK2 screen you need to add the BMP loader file (libpixbufloader-bmp.so) into gstreamer gdk-pixbuf plugin (/usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/) .

Then, you need to remove the cache and reload the loaders by using "rm /usr/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache" then "/usr/lib/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders > /usr/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache".

You should now be able to display .BMP files by using gstreamer, for example gst-play-1.0 test.bmp --videosink="imagefreeze ! autovideosink"

Please note that the BMP loader file is located inside yocto distrib build directory (build-openstlinuxweston-stm32mp1/tmp-glibc/sysroots-components/cortexa7t2hf-neon-vfpv4/gdk-pixbuf/usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-bmp.so" if you want to generate it by yourself.

BR,

Calvin

[Smedi]

Hi Calvin,

Thanks for your reply.

From your reply I understood gstreamer to be enabled in my yocto image so I enabled it and builded the image.After launching the image I found only gstlaunch-1.0 command but not gst-play-1.0.

As you mentioned I found libpixbufloader-bmp.so file in the yocto BSP of path "build/tmp-glibc/work/stm32mp1_disco-openstlinux_weston-linux-gnueabi/st-image-userfs/1.0-r0/recipe-sysroot-native/usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-bmp.so". And I did the remaining two steps for soft linking.

Is there anyway to launch using gstlaunch-1.0?

Regards

Srikanth.

[Calvin Ageneau]

Hi @srikanthmedisetty1.5616173611852678E12 (Community Member)​

By looking at the AI example code located in /usr/local/demo/bin/apps_laucher_example.sh on the target, you can see that it uses "gst-launch-1.0 filesrc location=/usr/local/demo/media/stm32cubeai.png ! pngdec ! videoconvert ! imagefreeze ! waylandsink" to display a PNG.

Using this as a base, you can use "gst-launch-1.0 filesrc location=test.bmp ! gdkpixbufdec ! videoconvert ! imagefreeze ! waylandsink" to display some BMP file, using a different decoder.

BR,

Calvin