face recognition using nxp-nnstreamer-examples

[jiangyaqiang]

Hi : I have got a problem by using nxp-nnstreamer-examples. enviroment: imx8mp yocto-5.15.71 Problem description: Could not detect face when run example_face_recognition_tflite.py log:2023-05-11 17:27:14.039 WARNING: [secondary] bus error Internal data stream error. ../git/libs/gst/base/gstbasesrc.c(3127): gst_base_src_loop (): /GstPipeline:pipeline0/GstAppSrc:appsrc_video: streaming stopped, reason error (-5) other infomration: it's ok of :example_face_detection_tflite.py Best Regards.

[Sanket_Parekh]

Hello @jiangyaqiang 

I hope you are doing well.

->It may be happening because of the incorrect width and height specified for the device, please take a look at it.

->One can also refer to this thread as it has the same error solved, one can also take reference from that.
https://community.nxp.com/t5/i-MX-Graphics/gst-launch-1-0-returns-Internal-data-stream-error/m-p/153...

->One can check the reason, which may be insufficient memory bandwidth.
-for DDR performance one can try the following command :
perf stat -e ddr0/read-cycles/,ddr0/write-cycles/ -a

->Bandwidth is restricted by processor internal buses bandwidth.

I hope this information helps you!

Thanks & Regards,

Sanket Parekh

[jiangyaqiang]

Hi Sanket Parekh:

        Thank you for the reply.

         My device using 3GB lpddr4 , I thinks the performance is ok. 

         And you has mentioned the "width and height" , what did you mean about it ?＂width and height＂　of the display or video input , or what ? 

        Thanks & Regards!

        YaQiang.

[Sanket_Parekh]

Hello @jiangyaqiang ,

I hope you are doing well.

->Please make sure to correct the width and height specified for the device, Because as per the display resolution one has to set it otherwise the picture quality may get compromised.

->Width & height is related to the display configuration.

Please refer to the below-given example I have shared for reference.

lcd@0 {
            compatible = "samsung,ld9040";
            #address-cells = <1>;
            #size-cells = <0>;

            reg = <0>;
            vdd3-supply = <&ldo7_reg>;
            vci-supply = <&ldo17_reg>;
            reset-gpios = <&gpy4 5 0>;
            spi-max-frequency = <1200000>;
            spi-cpol;
            spi-cpha;
            power-on-delay = <10>;
            reset-delay = <10>;
            panel-width-mm = <90>;
            panel-height-mm = <154>;
};

I hope this information helps!

Thanks & Regards,

Sanket Parekh

[jiangyaqiang]

HI Sanket_Parekh:

Thanks.

But My platform used HDMI output, it should no problem with the output config.

I have tried 1080p and 720p.

Best Ragards

[Sanket_Parekh]

Hello @jiangyaqiang ,

I hope you are doing well.

->Please make sure to use the latest version of nxp-nnstreamer.
Please follow section 10 Vision Pipeline with NNStreamer of the user guide.

https://www.nxp.com/docs/en/user-guide/IMX-MACHINE-LEARNING-UG.pdf

Thanks & Regards,

Sanket Parekh