Video play in Qt using GPU

Technical Support
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1

Hello Sir,

I am using Imx6DL 512MB 1.1V with iris 2.0A carrier board for advertisement display. I have written application in QT creator for playing video using Qvideowidget successfully.
When I have checked CPU utilization using top command it is more than 100% for play this video but when I am playing this video using gstreamer it is around 18-20% only,
I per my knowledge this issue might be related to GPU (Vivente). If so how I can enable GPU in my Qt application and reduce CPU utilization like as gstreamer.
Please look at attached screen shoot for more about issuelink text

I am using standard multimedia image prepared using bitbake BSP version 5.0.0

dk Rajpoot

2

Hi Deepak,

Can you more detail on BSP version ? Are you building image or using from Toradex?

Have you tried running gst pipeline in qt using qmedia player?

Have you already tested QtGStreamer ?

Can you try with EGLFS backend and see if you face same issue?

Give us some time to check at our end and we will come back with our findings.
Best Regards

Ritesh Kumar

3

Dear Ritesh,
Yes I have build my own image torizon 5.1 using bitbake (tdx-reference-multimedia-image).
In my knowledge there is no option to set gst pipeline in qmedia player, if so kindly provide some details.
QTgstreamer - Is it included in standard multimedia image or i have to include in local.conf?

I have tried eglfs but display not support message is coming on terminal (./display -platform eglfs). please find enclosed outputalt text
thanks
Deepak

4

In reference to above I have tried gst pipeline in qmediaplayer as well but gst output (sink ) is not controllable in Qvideowidget. Please advise how gst video sink can be rendered in Qvideowidget.

Regards
Deepak

5

Hi @deepakrajpoot

I Quickly tested local video playing with qt5 with my setup and my CPU usage is not more than 60%. Please find the attached snapshots.
link text

6

Hi ashok.tx
Thanks for sharing your input. And as attached imx6 output "Warning: “A lot of buffers are being dropped.”, means cpu drops lot of packet while playing, might be the probable cause of over cpu uses.
I have used multimedia image. Have you used the same and corresponding SDK ?

Thanks
Deepak

7

Hello @deepakrajpoot ,

Have you already checked this ticket here: https://www.toradex.com/community/questions/62488/gstreamer-stream-with-hw-acceleration.html?childToView=63120#comment-63120

Seems to be a similar issue to me.

Best regards,
Janani