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Linux/TDA2EVM5777: OpenCV VideoCapture RTSP stream

Israel Fernandez
Intellectual 715 points

Part Number: TDA2EVM5777

Tool/software: Linux

Hello,

I am running PROCESSOR_SDK_VISION_03_1_00_00 Linux and I am trying to use the OpenCV libraries that are pre-installed in the rootfs in my own C++ code application (not within the Vision SDK framework). In my attempt to run cv::VideoCapture capture(rtsp://UserName:Password@ip_address); in my c++ code, I can compile without errors. When running the executable, once I get to the point where I attempt to open the stream, I get these errors:


MmRpc_create: Error: open failed, name=/dev/rpmsg-dce
../git/libdce.c:416: dce_ipc_init ERROR: Failed eError == DCE_EOK error val -4../git/libdce.c:479: Engine_open ERROR: Failed dce_ipc_init(coreIdx) == DCE_EOK error val -4MmRpc_create: Error: open failed, name=/dev/rpmsg-dce
../git/libdce.c:416: dce_ipc_init ERROR: Failed eError == DCE_EOK error val -4../git/libdce.c:479: Engine_open ERROR: Failed dce_ipc_init(coreIdx) == DCE_EOK error val -4


I checked the kernel and it looks like I do have RPMSG enabled in the kernel:
root@dra7xx-evm:/tmp# cat config | grep RPMSG
CONFIG_RPMSG=m
CONFIG_RPMSG_RPC=m
CONFIG_RPMSG_PRU=m

  • Is there anyway to fix these errors so that I can grab from the rtsp stream?
  • Am I using the correct C++ OpenCV call to grab from the rtsp stream?
  • Do I have to enable anything in the kernel to use the OpenCV call?


Please let me know if you need anymore information and thank you in advance for your assistance. 

Thank you,
-iFer

  • 0
    TI__Mastermind 30480 points
    Hi iFer,
    MmRpc_create: Error: open failed, name=/dev/rpmsg-dce
    indicates that the ipumm firmware which is for multimedia decode/encode is not loaded.
    Can you check if the rootfs has /lib/firmware/dra7-ipu2-fw.xem4 and is linked to dra7-ipu2-fw.xem4.ipumm-fw ?
  • 0 in reply to Ramprasad
    Intellectual 715 points
    Hello,


    I looked at the /lib/firmware directory and here is the output:

    root@dra7xx-evm:~# ls -lF /lib/firmware/
    lrwxrwxrwx    1 root     root            49 Jun 27 00:37 am57xx-pru1_0-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt1_0.out
    lrwxrwxrwx    1 root     root            49 Jun 27 00:37 am57xx-pru1_1-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt1_1.out
    lrwxrwxrwx    1 root     root            49 Jun 27 00:37 am57xx-pru2_0-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt2_0.out
    lrwxrwxrwx    1 root     root            49 Jun 27 00:37 am57xx-pru2_1-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt2_1.out
    -rwxr-xr-x    1 root     root       9941039 Jun 27 00:37 dra7-dsp1-fw-radio.xe66*
    -rw-r--r--    1 root     root       7438272 Jun 27 00:37 dra7-dsp1-fw.xe66
    -rw-r--r--    1 root     root        889276 Jun 27 00:37 dra7-dsp1-fw.xe66.dspdce-fw
    -rw-r--r--    1 root     root      21810444 Jun 27 00:37 dra7-dsp1-fw.xe66.opencl-monitor
    -rw-r--r--    1 root     root       7438272 Jun 27 00:37 dra7-dsp2-fw.xe66
    -rw-r--r--    1 root     root      21810444 Jun 27 00:37 dra7-dsp2-fw.xe66.opencl-monitor
    -rw-r--r--    1 root     root       9499744 Jun 27 00:37 dra7-ipu2-fw.xem4
    -rw-r--r--    1 root     root       3743108 Jun 27 00:37 dra7-ipu2-fw.xem4.ipumm-fw
    -rw-r--r--    1 root     root        576565 Jun 27 00:37 dra7-ipu2-fw.xem4.map
    -rw-r--r--    1 root     root           186 Jun 27 00:37 goodix_9271_cfg.bin
    drwxr-xr-x    6 root     root          4096 Jun 27 00:37 ipc/
    drwxr-xr-x    2 root     root          4096 Jun 27 00:37 pru/
    drwxr-xr-x    2 root     root          4096 Jun 27 00:37 ti-connectivity/
    drwxr-xr-x    2 root     root          4096 Jun 27 00:37 tigon/
    -rw-r--r--    1 root     root          4002 Jun 27 00:37 vpdma-1b8.bin 



    The files you were referencing do exist, but it seems that they are not linked. 


    How do I proceed from here?

    Thank you!,
    -iFer
  • 0 in reply to Israel Fernandez
    TI__Mastermind 30480 points
    Hi iFer,
    Please refer this link to link
    processors.wiki.ti.com/index.php
    to dynamically link multimedia ipumm firmware to IPU2 and check if it works.

    Note: OpenCV rtsc capture is not a tested usecase in vision-sdk.

    Thanks
    Ramprasad
  • 0 in reply to Ramprasad
    Intellectual 715 points

    Hello,

    Thank you for your help!

    I attempted to follow the instructions to link firmware correctly by running these commands:


    cd /sys/bus/platform/drivers/omap-rproc/
    echo 55020000.ipu > unbind
    rm /lib/firmware/dra7-ipu2-fw.xem4
    ln -s /lib/firmware/dra7-ipu2-fw.xem4.ipumm-fw /lib/firmware/dra7-ipu2-fw.xem4
    echo 55020000.ipu > bind


    I rebooted linux and double checked to see if the link stayed and that 55020000.ipu is still bounded and they were. I then attempted to rerun my code to open up an RTSP stream, but it still gives me these error messages:

    MmRpc_create: Error: open failed, name=/dev/rpmsg-dce
    ../git/libdce.c:416: dce_ipc_init ERROR: Failed eError == DCE_EOK error val -4../git/libdce.c:479: Engine_open ERROR: Failed dce_ipc_init(coreIdx) == DCE_EOK error val -4MmRpc_create: Error: open failed, name=/dev/rpmsg-dce
    ../git/libdce.c:416: dce_ipc_init ERROR: Failed eError == DCE_EOK error val -4../git/libdce.c:479: Engine_open ERROR: Failed dce_ipc_init(coreIdx) == DCE_EOK error val -4



    Here is the output of ls -lF in the /lib/firmware directory:

    root@dra7xx-evm:/lib/firmware# ls -lF
    lrwxrwxrwx 1 root root 49 Jun 27 00:37 am57xx-pru1_0-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt1_0.out
    lrwxrwxrwx 1 root root 49 Jun 27 00:37 am57xx-pru1_1-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt1_1.out
    lrwxrwxrwx 1 root root 49 Jun 27 00:37 am57xx-pru2_0-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt2_0.out
    lrwxrwxrwx 1 root root 49 Jun 27 00:37 am57xx-pru2_1-fw -> /lib/firmware/pru/PRU_RPMsg_Echo_Interrupt2_1.out
    -rwxr-xr-x 1 root root 9941039 Jun 27 00:37 dra7-dsp1-fw-radio.xe66*
    -rw-r--r-- 1 root root 7438272 Jun 27 00:37 dra7-dsp1-fw.xe66
    -rw-r--r-- 1 root root 889276 Jun 27 00:37 dra7-dsp1-fw.xe66.dspdce-fw
    -rw-r--r-- 1 root root 21810444 Jun 27 00:37 dra7-dsp1-fw.xe66.opencl-monitor
    -rw-r--r-- 1 root root 7438272 Jun 27 00:37 dra7-dsp2-fw.xe66
    -rw-r--r-- 1 root root 21810444 Jun 27 00:37 dra7-dsp2-fw.xe66.opencl-monitor
    lrwxrwxrwx 1 root root 26 Jul 24 20:19 dra7-ipu2-fw.xem4 -> dra7-ipu2-fw.xem4.ipumm-fw
    -rw-r--r-- 1 root root 3743108 Jun 27 00:37 dra7-ipu2-fw.xem4.ipumm-fw
    -rw-r--r-- 1 root root 576565 Jun 27 00:37 dra7-ipu2-fw.xem4.map
    -rw-r--r-- 1 root root 186 Jun 27 00:37 goodix_9271_cfg.bin
    drwxr-xr-x 6 root root 4096 Jun 27 00:37 ipc/
    drwxr-xr-x 2 root root 4096 Jun 27 00:37 pru/
    drwxr-xr-x 2 root root 4096 Jun 27 00:37 ti-connectivity/
    drwxr-xr-x 2 root root 4096 Jun 27 00:37 tigon/
    -rw-r--r-- 1 root root 4002 Jun 27 00:37 vpdma-1b8.bin​​​​​​​


    Here is the output of ls -lF in the /sys/bus/platform/drivers/omap-rproc directory

    root@dra7xx-evm:/sys/bus/platform/drivers/omap-rproc# ls -lF
    lrwxrwxrwx 1 root root 0 Jul 24 19:50 40800000.dsp -> ../../../../devices/platform/44000000.ocp/40800000.dsp/
    lrwxrwxrwx 1 root root 0 Jul 24 19:50 41000000.dsp -> ../../../../devices/platform/44000000.ocp/41000000.dsp/
    lrwxrwxrwx 1 root root 0 Jul 24 19:53 55020000.ipu -> ../../../../devices/platform/44000000.ocp/55020000.ipu/
    --w------- 1 root root 4096 Jul 24 19:53 bind
    lrwxrwxrwx 1 root root 0 Jul 24 19:50 module -> ../../../../module/omap_remoteproc/
    --w------- 1 root root 4096 Jul 24 19:50 uevent
    --w------- 1 root root 4096 Jul 24 19:53 unbind








    I need to open up an RTSP stream from an IP camera. Is there anyway for me to do that? If not, then is there a way for me to grab a frame from the IP camera using C++ code with the OpenCV libraries already on the visionSDK linux?






    Thank you!,
    -iFer