Using Gstreamer to decode 4K video to 1080p

arnstein

Hello,

I have tried both the Firefly Ubuntu image and also making my own following the guide at http://rockchip.wikidot.com/linux-user-guide , but I am not able to use vpudec in Gstreamer.
Doing ls /dev I can find vpu_service and rkvdec.
In the build script for rockchip-linux it also installs rockchip_mpp libraries(https://github.com/rockchip-linu ... er/mk-rootfs.sh#L69).
How can I enable the VPU to do the 4K decoding? And how can I enable 1080p h264 encoder?

arnstein

I am able to compile the mpp and rkximage part of the rockchip-gstreamer plugin, however, after it is done I do not find mppvideodec and mpph264enc available in Gstreamer when doing gst-inspect.

arnstein

If I specify with --gst-plugin-path=/usr/local/lib/gstreamer-1.0/ I get the following message:

(gst-plugin-scanner:18102): GStreamer-WARNING **: Failed to load plugin '/usr/local/lib/gstreamer-1.0/libgstrockchipmpp.so': /usr/local/lib/gstreamer-1.0/libgstrockchipmpp.so: undefined symbol: gst_pad_get_task_state

How can I fix this?

arnstein

It is important for me to be able to choose which software etc. to flash on the image. That's why I choose to use the rockchip-linux rootfs script. Can you provide a similar script to generate your Firefly Ubuntu image? That way I can add the software and settings I need in my script.

arnstein

Thank you,
this works, but it is not a satisfactory solution for me. I want to be able to automate building several images with different settings (for example different SSIDs on wifi). With this method I would have to do this for each image separately.

arnstein

By the way, are you able to provide an Ubuntu image with working mppvideodec and mpph264enc in Gstreamer?

arnstein

Thank you,

this is what I am using. But then mppvideodec and mpph264enc are not enabled.