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VOXL camera configuration

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  • Chad SweetC Chad Sweet

    To change the image sensor on Seeker, you would have to disassemble the front end which would likely result in damage. It is really not recommended.

    gstreamer should work similar to your USB setup on your Linux PC. Do you have a gstreamer command that is working on your PC?

    if you type ls -la /dev/video* with your camera plugged in and unplugged, you should easily see which device it is enumerating to

    What is the exact module number of the camera you are trying to install?

    KrisK Offline
    KrisK Offline
    Kris
    Regular
    wrote on last edited by
    #6

    @Chad-Sweet
    If it’s possible to configure the Seeker with Hires + TOF + Stereo, where one stereo camera is acting as a tracking camera, can I send my Seeker back to ModalAi for this setup?
    Would the Seeker still have the VIO and VOA capabilities with this kind of setup?

    1 Reply Last reply
    0
    • Chad SweetC Chad Sweet

      To change the image sensor on Seeker, you would have to disassemble the front end which would likely result in damage. It is really not recommended.

      gstreamer should work similar to your USB setup on your Linux PC. Do you have a gstreamer command that is working on your PC?

      if you type ls -la /dev/video* with your camera plugged in and unplugged, you should easily see which device it is enumerating to

      What is the exact module number of the camera you are trying to install?

      KrisK Offline
      KrisK Offline
      Kris
      Regular
      wrote on last edited by Kris
      #7

      @Chad-Sweet
      My UVC camera is recognized on the VOXL but the voxl-uvc-server will not connect to it.

      voxl:~$ show-video-device-info.sh
      /dev/video2: e-CAM83_USB 2560:c184
      /dev/video3: e-CAM83_USB 2560:c184
      

      Here is the ls -la /dev/video* command output from my Linux PC.

      crw-rw----+ 1 root video 81, 0  3月 31 09:20 /dev/video0
      crw-rw----+ 1 root video 81, 1  3月 31 09:20 /dev/video1
      crw-rw----+ 1 root video 81, 2  3月 31 09:20 /dev/video2
      crw-rw----+ 1 root video 81, 3  3月 31 09:20 /dev/video3
      
      
      1 Reply Last reply
      0
      • Chad SweetC Offline
        Chad SweetC Offline
        Chad Sweet
        ModalAI Team
        wrote on last edited by
        #8
        This post is deleted!
        1 Reply Last reply
        0
        • Chad SweetC Offline
          Chad SweetC Offline
          Chad Sweet
          ModalAI Team
          wrote on last edited by
          #9

          voxl-uvc-server only supports a few data types. You may need to modify the code to support the format of the e-CAM83

          If you have a gstreamer command that works on your linux box, it should work on VOXL as well though.

          KrisK 1 Reply Last reply
          0
          • Chad SweetC Chad Sweet

            voxl-uvc-server only supports a few data types. You may need to modify the code to support the format of the e-CAM83

            If you have a gstreamer command that works on your linux box, it should work on VOXL as well though.

            KrisK Offline
            KrisK Offline
            Kris
            Regular
            wrote on last edited by
            #10

            @Chad-Sweet
            Thank you so much for looking into this for me.

            Can I ask for some assistance with modifying the voxl-uvc-server?

            Do I modify the voxl-uvc-server C file, then make it into an ipk and push it into the VOXL?

            1 Reply Last reply
            0
            • Chad SweetC Offline
              Chad SweetC Offline
              Chad Sweet
              ModalAI Team
              wrote on last edited by
              #11

              The instructions are in the readme here: https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server

              Chad SweetC 1 Reply Last reply
              0
              • Chad SweetC Chad Sweet

                The instructions are in the readme here: https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server

                Chad SweetC Offline
                Chad SweetC Offline
                Chad Sweet
                ModalAI Team
                wrote on last edited by
                #12

                @Chad-Sweet But yes, you modify the code, build it, and push the IPK to VOXL

                KrisK 2 Replies Last reply
                0
                • Chad SweetC Chad Sweet

                  @Chad-Sweet But yes, you modify the code, build it, and push the IPK to VOXL

                  KrisK Offline
                  KrisK Offline
                  Kris
                  Regular
                  wrote on last edited by
                  #13

                  @Chad-Sweet
                  Is the Hires + TOF + Stereo (one stereo configured as the tracking camera) configuration possible?
                  In case the e-CAM83 will not work with the Seeker.

                  1 Reply Last reply
                  0
                  • Chad SweetC Chad Sweet

                    @Chad-Sweet But yes, you modify the code, build it, and push the IPK to VOXL

                    KrisK Offline
                    KrisK Offline
                    Kris
                    Regular
                    wrote on last edited by Kris
                    #14

                    @Chad-Sweet
                    Just to confirm,
                    If I modify the voxl-uvc-server/src/main.c file, to allow H264 format, would this work?
                    Or does the modification need to happen somewhere else in the main.c?
                    I’m just not exactly sure what or where I need to modify the voxl-uvc-server to make my UVC camera work.

                    Eric KatzfeyE 1 Reply Last reply
                    0
                    • KrisK Kris

                      @Chad-Sweet
                      Just to confirm,
                      If I modify the voxl-uvc-server/src/main.c file, to allow H264 format, would this work?
                      Or does the modification need to happen somewhere else in the main.c?
                      I’m just not exactly sure what or where I need to modify the voxl-uvc-server to make my UVC camera work.

                      Eric KatzfeyE Offline
                      Eric KatzfeyE Offline
                      Eric Katzfey
                      ModalAI Team
                      wrote on last edited by
                      #15

                      @Kris H264 is not supported in voxl-uvc-server. See https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/dev/src/main.c#L64. You may be able to add support for it but there are some tricky aspects to H264 streaming that you would need to be aware of before attempting it. Seems like you should start with the video3 interface since it supports 640x480 YUYV

                      KrisK 2 Replies Last reply
                      0
                      • Eric KatzfeyE Eric Katzfey

                        @Kris H264 is not supported in voxl-uvc-server. See https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/dev/src/main.c#L64. You may be able to add support for it but there are some tricky aspects to H264 streaming that you would need to be aware of before attempting it. Seems like you should start with the video3 interface since it supports 640x480 YUYV

                        KrisK Offline
                        KrisK Offline
                        Kris
                        Regular
                        wrote on last edited by
                        #16

                        @Eric-Katzfey
                        Ok, thank you.
                        I will start with attempting /dev/video3 first.

                        1 Reply Last reply
                        0
                        • Eric KatzfeyE Eric Katzfey

                          @Kris H264 is not supported in voxl-uvc-server. See https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/dev/src/main.c#L64. You may be able to add support for it but there are some tricky aspects to H264 streaming that you would need to be aware of before attempting it. Seems like you should start with the video3 interface since it supports 640x480 YUYV

                          KrisK Offline
                          KrisK Offline
                          Kris
                          Regular
                          wrote on last edited by Kris
                          #17

                          @Eric-Katzfey
                          It seems as if VOXL1 is not able to connect with my UVC camera.
                          Output when UVC camera is connected to the Seeker;

                          voxl:~$ gst-device-monitor-1.0 Video/Source
                          Probing devices...
                          
                          
                          (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          No devices found!
                          voxl:~$ gst-device-monitor-1.0             
                          Probing devices...
                          
                          
                          (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                          
                          Device found:
                          
                          	name  : msm_fd
                          	class : Video/Sink
                          	caps  : video/x-raw, format=(string)GRAY8, width=(int)[ 320, 854 ], height=(int)[ 240, 480 ], interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1, colorimetry=(string){ bt601, smpte240m, bt709, 2:4:5:2, 2:4:5:3, 1:4:7:1, 2:4:7:1, 2:4:12:8, 2:6:5:7, 2:0:0:0 };
                          	properties:
                          		device.path = /dev/video1
                          		udev-probed = false
                          		device.api = v4l2
                          		v4l2.device.driver = msm_fd
                          		v4l2.device.card = msm_fd
                          		v4l2.device.bus_info = ""
                          		v4l2.device.version = 201287 (0x00031247)
                          		v4l2.device.capabilities = 69206018 (0x04200002)
                          		v4l2.device.device_caps = 2097152 (0x00200000)
                          

                          Output when my UVC camera is connected to my Linux PC;

                          seeker3@seeker3-VirtualBox:~$ gst-device-monitor-1.0 Video/Source
                          Probing devices...
                          
                          
                          Device found:
                          
                          	name  : e-CAM83_USB
                          	class : Video/Source
                          	caps  : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction){ 30/1, 15/1 };
                          	        video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                          	properties:
                          		udev-probed = true
                          		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                          		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video0
                          		device.bus = usb
                          		device.subsystem = video4linux
                          		device.vendor.id = 2560
                          		device.vendor.name = e-ConSystems
                          		device.product.id = c184
                          		device.product.name = e-CAM83_USB
                          		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                          		device.capabilities = :capture:
                          		device.api = v4l2
                          		device.path = /dev/video0
                          		v4l2.device.driver = uvcvideo
                          		v4l2.device.card = e-CAM83_USB
                          		v4l2.device.bus_info = usb-0000:00:0c.0-2
                          		v4l2.device.version = 328933 (0x000504e5)
                          		v4l2.device.capabilities = 2225078273 (0x84a00001)
                          		v4l2.device.device_caps = 69206017 (0x04200001)
                          	gst-launch-1.0 v4l2src ! ...
                          
                          
                          Device found:
                          
                          	name  : e-CAM83_USB
                          	class : Video/Source
                          	caps  : video/x-raw, format=(string)YUY2, width=(int)640, height=(int)480, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1;
                          	        image/jpeg, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                          	properties:
                          		udev-probed = true
                          		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                          		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video2
                          		device.bus = usb
                          		device.subsystem = video4linux
                          		device.vendor.id = 2560
                          		device.vendor.name = e-ConSystems
                          		device.product.id = c184
                          		device.product.name = e-CAM83_USB
                          		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                          		device.capabilities = :capture:
                          		device.api = v4l2
                          		device.path = /dev/video2
                          		v4l2.device.driver = uvcvideo
                          		v4l2.device.card = e-CAM83_USB
                          		v4l2.device.bus_info = usb-0000:00:0c.0-2
                          		v4l2.device.version = 328933 (0x000504e5)
                          		v4l2.device.capabilities = 2225078273 (0x84a00001)
                          		v4l2.device.device_caps = 69206017 (0x04200001)
                          	gst-launch-1.0 v4l2src device=/dev/video2 ! ...
                          
                          seeker3@seeker3-VirtualBox:~$ gst-device-monitor-1.0
                          Probing devices...
                          
                          
                          Device found:
                          
                          	name  : Monitor of Built-in Audio Analog Stereo
                          	class : Audio/Source
                          	caps  : audio/x-raw, format=(string){ S16LE, S16BE, F32LE, F32BE, S32LE, S32BE, S24LE, S24BE, S24_32LE, S24_32BE, U8 }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	        audio/x-alaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	        audio/x-mulaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	properties:
                          		device.description = "Monitor\ of\ Built-in\ Audio\ Analog\ Stereo"
                          		device.class = monitor
                          		alsa.card = 0
                          		alsa.card_name = "Intel\ 82801AA-ICH"
                          		alsa.long_card_name = "Intel\ 82801AA-ICH\ with\ AD1980\ at\ irq\ 21"
                          		alsa.driver_name = snd_intel8x0
                          		device.bus_path = pci-0000:00:05.0
                          		sysfs.path = /devices/pci0000:00/0000:00:05.0/sound/card0
                          		device.bus = pci
                          		device.vendor.id = 8086
                          		device.vendor.name = "Intel\ Corporation"
                          		device.product.id = 2415
                          		device.product.name = "82801AA\ AC\'97\ Audio\ Controller"
                          		device.form_factor = internal
                          		device.string = 0
                          		module-udev-detect.discovered = 1
                          		device.icon_name = audio-card-pci
                          	gst-launch-1.0 pulsesrc device=alsa_output.pci-0000_00_05.0.analog-stereo.monitor ! ...
                          
                          
                          Device found:
                          
                          	name  : Built-in Audio Analog Stereo
                          	class : Audio/Source
                          	caps  : audio/x-raw, format=(string){ S16LE, S16BE, F32LE, F32BE, S32LE, S32BE, S24LE, S24BE, S24_32LE, S24_32BE, U8 }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	        audio/x-alaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	        audio/x-mulaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	properties:
                          		alsa.resolution_bits = 16
                          		device.api = alsa
                          		device.class = sound
                          		alsa.class = generic
                          		alsa.subclass = generic-mix
                          		alsa.name = "Intel\ 82801AA-ICH"
                          		alsa.id = "Intel\ ICH"
                          		alsa.subdevice = 0
                          		alsa.subdevice_name = "subdevice\ \#0"
                          		alsa.device = 0
                          		alsa.card = 0
                          		alsa.card_name = "Intel\ 82801AA-ICH"
                          		alsa.long_card_name = "Intel\ 82801AA-ICH\ with\ AD1980\ at\ irq\ 21"
                          		alsa.driver_name = snd_intel8x0
                          		device.bus_path = pci-0000:00:05.0
                          		sysfs.path = /devices/pci0000:00/0000:00:05.0/sound/card0
                          		device.bus = pci
                          		device.vendor.id = 8086
                          		device.vendor.name = "Intel\ Corporation"
                          		device.product.id = 2415
                          		device.product.name = "82801AA\ AC\'97\ Audio\ Controller"
                          		device.form_factor = internal
                          		device.string = front:0
                          		device.buffering.buffer_size = 17632
                          		device.buffering.fragment_size = 4408
                          		device.access_mode = mmap
                          		device.profile.name = analog-stereo
                          		device.profile.description = "Analog\ Stereo"
                          		device.description = "Built-in\ Audio\ Analog\ Stereo"
                          		alsa.mixer_name = "Analog\ Devices\ AD1980"
                          		alsa.components = AC97a:41445370
                          		module-udev-detect.discovered = 1
                          		device.icon_name = audio-card-pci
                          	gst-launch-1.0 pulsesrc device=alsa_input.pci-0000_00_05.0.analog-stereo ! ...
                          
                          
                          Device found:
                          
                          	name  : Built-in Audio Analog Stereo
                          	class : Audio/Sink
                          	caps  : audio/x-raw, format=(string){ S16LE, S16BE, F32LE, F32BE, S32LE, S32BE, S24LE, S24BE, S24_32LE, S24_32BE, U8 }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	        audio/x-alaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	        audio/x-mulaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                          	properties:
                          		alsa.resolution_bits = 16
                          		device.api = alsa
                          		device.class = sound
                          		alsa.class = generic
                          		alsa.subclass = generic-mix
                          		alsa.name = "Intel\ 82801AA-ICH"
                          		alsa.id = "Intel\ ICH"
                          		alsa.subdevice = 0
                          		alsa.subdevice_name = "subdevice\ \#0"
                          		alsa.device = 0
                          		alsa.card = 0
                          		alsa.card_name = "Intel\ 82801AA-ICH"
                          		alsa.long_card_name = "Intel\ 82801AA-ICH\ with\ AD1980\ at\ irq\ 21"
                          		alsa.driver_name = snd_intel8x0
                          		device.bus_path = pci-0000:00:05.0
                          		sysfs.path = /devices/pci0000:00/0000:00:05.0/sound/card0
                          		device.bus = pci
                          		device.vendor.id = 8086
                          		device.vendor.name = "Intel\ Corporation"
                          		device.product.id = 2415
                          		device.product.name = "82801AA\ AC\'97\ Audio\ Controller"
                          		device.form_factor = internal
                          		device.string = front:0
                          		device.buffering.buffer_size = 19188
                          		device.buffering.fragment_size = 6396
                          		device.access_mode = mmap
                          		device.profile.name = analog-stereo
                          		device.profile.description = "Analog\ Stereo"
                          		device.description = "Built-in\ Audio\ Analog\ Stereo"
                          		alsa.mixer_name = "Analog\ Devices\ AD1980"
                          		alsa.components = AC97a:41445370
                          		module-udev-detect.discovered = 1
                          		device.icon_name = audio-card-pci
                          	gst-launch-1.0 ... ! pulsesink device=alsa_output.pci-0000_00_05.0.analog-stereo
                          
                          
                          Device found:
                          
                          	name  : e-CAM83_USB
                          	class : Video/Source
                          	caps  : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction){ 30/1, 15/1 };
                          	        video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                          	properties:
                          		udev-probed = true
                          		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                          		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video0
                          		device.bus = usb
                          		device.subsystem = video4linux
                          		device.vendor.id = 2560
                          		device.vendor.name = e-ConSystems
                          		device.product.id = c184
                          		device.product.name = e-CAM83_USB
                          		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                          		device.capabilities = :capture:
                          		device.api = v4l2
                          		device.path = /dev/video0
                          		v4l2.device.driver = uvcvideo
                          		v4l2.device.card = e-CAM83_USB
                          		v4l2.device.bus_info = usb-0000:00:0c.0-2
                          		v4l2.device.version = 328933 (0x000504e5)
                          		v4l2.device.capabilities = 2225078273 (0x84a00001)
                          		v4l2.device.device_caps = 69206017 (0x04200001)
                          	gst-launch-1.0 v4l2src ! ...
                          
                          
                          Device found:
                          
                          	name  : e-CAM83_USB
                          	class : Video/Source
                          	caps  : video/x-raw, format=(string)YUY2, width=(int)640, height=(int)480, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1;
                          	        image/jpeg, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                          	properties:
                          		udev-probed = true
                          		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                          		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video2
                          		device.bus = usb
                          		device.subsystem = video4linux
                          		device.vendor.id = 2560
                          		device.vendor.name = e-ConSystems
                          		device.product.id = c184
                          		device.product.name = e-CAM83_USB
                          		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                          		device.capabilities = :capture:
                          		device.api = v4l2
                          		device.path = /dev/video2
                          		v4l2.device.driver = uvcvideo
                          		v4l2.device.card = e-CAM83_USB
                          		v4l2.device.bus_info = usb-0000:00:0c.0-2
                          		v4l2.device.version = 328933 (0x000504e5)
                          		v4l2.device.capabilities = 2225078273 (0x84a00001)
                          		v4l2.device.device_caps = 69206017 (0x04200001)
                          	gst-launch-1.0 v4l2src device=/dev/video2 ! ...
                          

                          A simple video test will not work either.

                          voxl:~$ gst-launch-1.0 videotestsrc ! videoconvert ! autovideosink
                          Setting pipeline to PAUSED ...
                          Pipeline is PREROLLING ...
                          WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                          Additional debug info:
                          /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                          Failed to find a usable video sink
                          Pipeline is PREROLLED ...
                          Setting pipeline to PLAYING ...
                          New clock: GstSystemClock
                          ^Chandling interrupt.
                          Interrupt: Stopping pipeline ...
                          Execution ended after 0:00:17.998587815
                          Setting pipeline to PAUSED ...
                          Setting pipeline to READY ...
                          Setting pipeline to NULL ...
                          Freeing pipeline ...
                          

                          Are there any plugins that I could be missing?

                          KrisK 1 Reply Last reply
                          0
                          • KrisK Kris

                            @Eric-Katzfey
                            It seems as if VOXL1 is not able to connect with my UVC camera.
                            Output when UVC camera is connected to the Seeker;

                            voxl:~$ gst-device-monitor-1.0 Video/Source
                            Probing devices...
                            
                            
                            (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4152): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            No devices found!
                            voxl:~$ gst-device-monitor-1.0             
                            Probing devices...
                            
                            
                            (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            (gst-device-monitor-1.0:4157): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed
                            
                            Device found:
                            
                            	name  : msm_fd
                            	class : Video/Sink
                            	caps  : video/x-raw, format=(string)GRAY8, width=(int)[ 320, 854 ], height=(int)[ 240, 480 ], interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1, colorimetry=(string){ bt601, smpte240m, bt709, 2:4:5:2, 2:4:5:3, 1:4:7:1, 2:4:7:1, 2:4:12:8, 2:6:5:7, 2:0:0:0 };
                            	properties:
                            		device.path = /dev/video1
                            		udev-probed = false
                            		device.api = v4l2
                            		v4l2.device.driver = msm_fd
                            		v4l2.device.card = msm_fd
                            		v4l2.device.bus_info = ""
                            		v4l2.device.version = 201287 (0x00031247)
                            		v4l2.device.capabilities = 69206018 (0x04200002)
                            		v4l2.device.device_caps = 2097152 (0x00200000)
                            

                            Output when my UVC camera is connected to my Linux PC;

                            seeker3@seeker3-VirtualBox:~$ gst-device-monitor-1.0 Video/Source
                            Probing devices...
                            
                            
                            Device found:
                            
                            	name  : e-CAM83_USB
                            	class : Video/Source
                            	caps  : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction){ 30/1, 15/1 };
                            	        video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                            	properties:
                            		udev-probed = true
                            		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                            		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video0
                            		device.bus = usb
                            		device.subsystem = video4linux
                            		device.vendor.id = 2560
                            		device.vendor.name = e-ConSystems
                            		device.product.id = c184
                            		device.product.name = e-CAM83_USB
                            		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                            		device.capabilities = :capture:
                            		device.api = v4l2
                            		device.path = /dev/video0
                            		v4l2.device.driver = uvcvideo
                            		v4l2.device.card = e-CAM83_USB
                            		v4l2.device.bus_info = usb-0000:00:0c.0-2
                            		v4l2.device.version = 328933 (0x000504e5)
                            		v4l2.device.capabilities = 2225078273 (0x84a00001)
                            		v4l2.device.device_caps = 69206017 (0x04200001)
                            	gst-launch-1.0 v4l2src ! ...
                            
                            
                            Device found:
                            
                            	name  : e-CAM83_USB
                            	class : Video/Source
                            	caps  : video/x-raw, format=(string)YUY2, width=(int)640, height=(int)480, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1;
                            	        image/jpeg, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                            	properties:
                            		udev-probed = true
                            		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                            		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video2
                            		device.bus = usb
                            		device.subsystem = video4linux
                            		device.vendor.id = 2560
                            		device.vendor.name = e-ConSystems
                            		device.product.id = c184
                            		device.product.name = e-CAM83_USB
                            		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                            		device.capabilities = :capture:
                            		device.api = v4l2
                            		device.path = /dev/video2
                            		v4l2.device.driver = uvcvideo
                            		v4l2.device.card = e-CAM83_USB
                            		v4l2.device.bus_info = usb-0000:00:0c.0-2
                            		v4l2.device.version = 328933 (0x000504e5)
                            		v4l2.device.capabilities = 2225078273 (0x84a00001)
                            		v4l2.device.device_caps = 69206017 (0x04200001)
                            	gst-launch-1.0 v4l2src device=/dev/video2 ! ...
                            
                            seeker3@seeker3-VirtualBox:~$ gst-device-monitor-1.0
                            Probing devices...
                            
                            
                            Device found:
                            
                            	name  : Monitor of Built-in Audio Analog Stereo
                            	class : Audio/Source
                            	caps  : audio/x-raw, format=(string){ S16LE, S16BE, F32LE, F32BE, S32LE, S32BE, S24LE, S24BE, S24_32LE, S24_32BE, U8 }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	        audio/x-alaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	        audio/x-mulaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	properties:
                            		device.description = "Monitor\ of\ Built-in\ Audio\ Analog\ Stereo"
                            		device.class = monitor
                            		alsa.card = 0
                            		alsa.card_name = "Intel\ 82801AA-ICH"
                            		alsa.long_card_name = "Intel\ 82801AA-ICH\ with\ AD1980\ at\ irq\ 21"
                            		alsa.driver_name = snd_intel8x0
                            		device.bus_path = pci-0000:00:05.0
                            		sysfs.path = /devices/pci0000:00/0000:00:05.0/sound/card0
                            		device.bus = pci
                            		device.vendor.id = 8086
                            		device.vendor.name = "Intel\ Corporation"
                            		device.product.id = 2415
                            		device.product.name = "82801AA\ AC\'97\ Audio\ Controller"
                            		device.form_factor = internal
                            		device.string = 0
                            		module-udev-detect.discovered = 1
                            		device.icon_name = audio-card-pci
                            	gst-launch-1.0 pulsesrc device=alsa_output.pci-0000_00_05.0.analog-stereo.monitor ! ...
                            
                            
                            Device found:
                            
                            	name  : Built-in Audio Analog Stereo
                            	class : Audio/Source
                            	caps  : audio/x-raw, format=(string){ S16LE, S16BE, F32LE, F32BE, S32LE, S32BE, S24LE, S24BE, S24_32LE, S24_32BE, U8 }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	        audio/x-alaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	        audio/x-mulaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	properties:
                            		alsa.resolution_bits = 16
                            		device.api = alsa
                            		device.class = sound
                            		alsa.class = generic
                            		alsa.subclass = generic-mix
                            		alsa.name = "Intel\ 82801AA-ICH"
                            		alsa.id = "Intel\ ICH"
                            		alsa.subdevice = 0
                            		alsa.subdevice_name = "subdevice\ \#0"
                            		alsa.device = 0
                            		alsa.card = 0
                            		alsa.card_name = "Intel\ 82801AA-ICH"
                            		alsa.long_card_name = "Intel\ 82801AA-ICH\ with\ AD1980\ at\ irq\ 21"
                            		alsa.driver_name = snd_intel8x0
                            		device.bus_path = pci-0000:00:05.0
                            		sysfs.path = /devices/pci0000:00/0000:00:05.0/sound/card0
                            		device.bus = pci
                            		device.vendor.id = 8086
                            		device.vendor.name = "Intel\ Corporation"
                            		device.product.id = 2415
                            		device.product.name = "82801AA\ AC\'97\ Audio\ Controller"
                            		device.form_factor = internal
                            		device.string = front:0
                            		device.buffering.buffer_size = 17632
                            		device.buffering.fragment_size = 4408
                            		device.access_mode = mmap
                            		device.profile.name = analog-stereo
                            		device.profile.description = "Analog\ Stereo"
                            		device.description = "Built-in\ Audio\ Analog\ Stereo"
                            		alsa.mixer_name = "Analog\ Devices\ AD1980"
                            		alsa.components = AC97a:41445370
                            		module-udev-detect.discovered = 1
                            		device.icon_name = audio-card-pci
                            	gst-launch-1.0 pulsesrc device=alsa_input.pci-0000_00_05.0.analog-stereo ! ...
                            
                            
                            Device found:
                            
                            	name  : Built-in Audio Analog Stereo
                            	class : Audio/Sink
                            	caps  : audio/x-raw, format=(string){ S16LE, S16BE, F32LE, F32BE, S32LE, S32BE, S24LE, S24BE, S24_32LE, S24_32BE, U8 }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	        audio/x-alaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	        audio/x-mulaw, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 32 ];
                            	properties:
                            		alsa.resolution_bits = 16
                            		device.api = alsa
                            		device.class = sound
                            		alsa.class = generic
                            		alsa.subclass = generic-mix
                            		alsa.name = "Intel\ 82801AA-ICH"
                            		alsa.id = "Intel\ ICH"
                            		alsa.subdevice = 0
                            		alsa.subdevice_name = "subdevice\ \#0"
                            		alsa.device = 0
                            		alsa.card = 0
                            		alsa.card_name = "Intel\ 82801AA-ICH"
                            		alsa.long_card_name = "Intel\ 82801AA-ICH\ with\ AD1980\ at\ irq\ 21"
                            		alsa.driver_name = snd_intel8x0
                            		device.bus_path = pci-0000:00:05.0
                            		sysfs.path = /devices/pci0000:00/0000:00:05.0/sound/card0
                            		device.bus = pci
                            		device.vendor.id = 8086
                            		device.vendor.name = "Intel\ Corporation"
                            		device.product.id = 2415
                            		device.product.name = "82801AA\ AC\'97\ Audio\ Controller"
                            		device.form_factor = internal
                            		device.string = front:0
                            		device.buffering.buffer_size = 19188
                            		device.buffering.fragment_size = 6396
                            		device.access_mode = mmap
                            		device.profile.name = analog-stereo
                            		device.profile.description = "Analog\ Stereo"
                            		device.description = "Built-in\ Audio\ Analog\ Stereo"
                            		alsa.mixer_name = "Analog\ Devices\ AD1980"
                            		alsa.components = AC97a:41445370
                            		module-udev-detect.discovered = 1
                            		device.icon_name = audio-card-pci
                            	gst-launch-1.0 ... ! pulsesink device=alsa_output.pci-0000_00_05.0.analog-stereo
                            
                            
                            Device found:
                            
                            	name  : e-CAM83_USB
                            	class : Video/Source
                            	caps  : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction){ 30/1, 15/1 };
                            	        video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                            	properties:
                            		udev-probed = true
                            		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                            		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video0
                            		device.bus = usb
                            		device.subsystem = video4linux
                            		device.vendor.id = 2560
                            		device.vendor.name = e-ConSystems
                            		device.product.id = c184
                            		device.product.name = e-CAM83_USB
                            		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                            		device.capabilities = :capture:
                            		device.api = v4l2
                            		device.path = /dev/video0
                            		v4l2.device.driver = uvcvideo
                            		v4l2.device.card = e-CAM83_USB
                            		v4l2.device.bus_info = usb-0000:00:0c.0-2
                            		v4l2.device.version = 328933 (0x000504e5)
                            		v4l2.device.capabilities = 2225078273 (0x84a00001)
                            		v4l2.device.device_caps = 69206017 (0x04200001)
                            	gst-launch-1.0 v4l2src ! ...
                            
                            
                            Device found:
                            
                            	name  : e-CAM83_USB
                            	class : Video/Source
                            	caps  : video/x-raw, format=(string)YUY2, width=(int)640, height=(int)480, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1;
                            	        image/jpeg, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1;
                            	properties:
                            		udev-probed = true
                            		device.bus_path = pci-0000:00:0c.0-usb-0:2:1.0
                            		sysfs.path = /sys/devices/pci0000:00/0000:00:0c.0/usb1/1-2/1-2:1.0/video4linux/video2
                            		device.bus = usb
                            		device.subsystem = video4linux
                            		device.vendor.id = 2560
                            		device.vendor.name = e-ConSystems
                            		device.product.id = c184
                            		device.product.name = e-CAM83_USB
                            		device.serial = e-ConSystems_e-CAM83_USB_00.00.01
                            		device.capabilities = :capture:
                            		device.api = v4l2
                            		device.path = /dev/video2
                            		v4l2.device.driver = uvcvideo
                            		v4l2.device.card = e-CAM83_USB
                            		v4l2.device.bus_info = usb-0000:00:0c.0-2
                            		v4l2.device.version = 328933 (0x000504e5)
                            		v4l2.device.capabilities = 2225078273 (0x84a00001)
                            		v4l2.device.device_caps = 69206017 (0x04200001)
                            	gst-launch-1.0 v4l2src device=/dev/video2 ! ...
                            

                            A simple video test will not work either.

                            voxl:~$ gst-launch-1.0 videotestsrc ! videoconvert ! autovideosink
                            Setting pipeline to PAUSED ...
                            Pipeline is PREROLLING ...
                            WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                            Additional debug info:
                            /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                            Failed to find a usable video sink
                            Pipeline is PREROLLED ...
                            Setting pipeline to PLAYING ...
                            New clock: GstSystemClock
                            ^Chandling interrupt.
                            Interrupt: Stopping pipeline ...
                            Execution ended after 0:00:17.998587815
                            Setting pipeline to PAUSED ...
                            Setting pipeline to READY ...
                            Setting pipeline to NULL ...
                            Freeing pipeline ...
                            

                            Are there any plugins that I could be missing?

                            KrisK Offline
                            KrisK Offline
                            Kris
                            Regular
                            wrote on last edited by Kris
                            #18

                            Keeps failing to find a usable video sink.

                            voxl:~$ show-video-device-info.sh
                            /dev/video2: e-CAM83_USB 2560:c184
                            /dev/video3: e-CAM83_USB 2560:c184
                            voxl:~$ gst-launch-1.0 v4l2src device=/dev/video3 ! videoconvert ! autovideosink
                            Setting pipeline to PAUSED ...
                            ERROR: Pipeline doesn't want to pause.
                            WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                            Additional debug info:
                            /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                            Failed to find a usable video sink
                            ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not open device '/dev/video3' for reading and writing.
                            Additional debug info:
                            /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/sys/v4l2/v4l2_calls.c(625): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
                            system error: Device or resource busy
                            Setting pipeline to NULL ...
                            Freeing pipeline ...
                            voxl:~$ gst-launch-1.0 v4l2src device=/dev/video2 ! videoconvert ! autovideosink
                            Setting pipeline to PAUSED ...
                            ERROR: Pipeline doesn't want to pause.
                            WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                            Additional debug info:
                            /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                            Failed to find a usable video sink
                            ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not open device '/dev/video2' for reading and writing.
                            Additional debug info:
                            /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/sys/v4l2/v4l2_calls.c(625): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
                            system error: Device or resource busy
                            Setting pipeline to NULL ...
                            Freeing pipeline ...
                            voxl:~$ 
                            

                            Output when debug command is used.

                            voxl:~$ GST_DEBUG=3 gst-launch-1.0 v4l2src device=/dev/video3 ! videoconvert ! autovideosink
                            Setting pipeline to PAUSED ...
                            0:00:00.229741613  4689    0xdf500 WARN              autodetect gstautodetect.c:347:gst_auto_detect_find_best:<autovideosink0> warning: Failed to find a usable video sink
                            0:00:00.277135238  4689    0xdf500 WARN                    v4l2 v4l2_calls.c:625:gst_v4l2_open:<v4l2src0> error: Could not open device '/dev/video3' for reading and writing.
                            0:00:00.277213207  4689    0xdf500 WARN                    v4l2 v4l2_calls.c:625:gst_v4l2_open:<v4l2src0> error: system error: Device or resource busy
                            ERROR: Pipeline doesn't want to pause.
                            WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                            Additional debug info:
                            /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                            Failed to find a usable video sink
                            ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not open device '/dev/video3' for reading and writing.
                            Additional debug info:
                            /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/sys/v4l2/v4l2_calls.c(625): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
                            system error: Device or resource busy
                            Setting pipeline to NULL ...
                            Freeing pipeline ...
                            
                            Eric KatzfeyE 1 Reply Last reply
                            0
                            • tomT Offline
                              tomT Offline
                              tom
                              admin
                              wrote on last edited by
                              #19

                              @Kris You can't use autovideosink on VOXL because it doesn't have a display

                              KrisK 1 Reply Last reply
                              0
                              • KrisK Kris

                                Keeps failing to find a usable video sink.

                                voxl:~$ show-video-device-info.sh
                                /dev/video2: e-CAM83_USB 2560:c184
                                /dev/video3: e-CAM83_USB 2560:c184
                                voxl:~$ gst-launch-1.0 v4l2src device=/dev/video3 ! videoconvert ! autovideosink
                                Setting pipeline to PAUSED ...
                                ERROR: Pipeline doesn't want to pause.
                                WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                                Additional debug info:
                                /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                                Failed to find a usable video sink
                                ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not open device '/dev/video3' for reading and writing.
                                Additional debug info:
                                /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/sys/v4l2/v4l2_calls.c(625): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
                                system error: Device or resource busy
                                Setting pipeline to NULL ...
                                Freeing pipeline ...
                                voxl:~$ gst-launch-1.0 v4l2src device=/dev/video2 ! videoconvert ! autovideosink
                                Setting pipeline to PAUSED ...
                                ERROR: Pipeline doesn't want to pause.
                                WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                                Additional debug info:
                                /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                                Failed to find a usable video sink
                                ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not open device '/dev/video2' for reading and writing.
                                Additional debug info:
                                /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/sys/v4l2/v4l2_calls.c(625): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
                                system error: Device or resource busy
                                Setting pipeline to NULL ...
                                Freeing pipeline ...
                                voxl:~$ 
                                

                                Output when debug command is used.

                                voxl:~$ GST_DEBUG=3 gst-launch-1.0 v4l2src device=/dev/video3 ! videoconvert ! autovideosink
                                Setting pipeline to PAUSED ...
                                0:00:00.229741613  4689    0xdf500 WARN              autodetect gstautodetect.c:347:gst_auto_detect_find_best:<autovideosink0> warning: Failed to find a usable video sink
                                0:00:00.277135238  4689    0xdf500 WARN                    v4l2 v4l2_calls.c:625:gst_v4l2_open:<v4l2src0> error: Could not open device '/dev/video3' for reading and writing.
                                0:00:00.277213207  4689    0xdf500 WARN                    v4l2 v4l2_calls.c:625:gst_v4l2_open:<v4l2src0> error: system error: Device or resource busy
                                ERROR: Pipeline doesn't want to pause.
                                WARNING: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0: Resource not found.
                                Additional debug info:
                                /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/gst/autodetect/gstautodetect.c(347): gst_auto_detect_find_best (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0:
                                Failed to find a usable video sink
                                ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not open device '/dev/video3' for reading and writing.
                                Additional debug info:
                                /opt/workspace/build/apq8096-le-1-0-1_ap_standard_oem.git/apps_proc/poky/build/tmp-glibc/work/armv7a-vfp-neon-oemllib32-linux-gnueabi/lib32-gstreamer1.0-plugins-good/1.10.4-r0/gst-plugins-good-1.10.4/sys/v4l2/v4l2_calls.c(625): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
                                system error: Device or resource busy
                                Setting pipeline to NULL ...
                                Freeing pipeline ...
                                
                                Eric KatzfeyE Offline
                                Eric KatzfeyE Offline
                                Eric Katzfey
                                ModalAI Team
                                wrote on last edited by
                                #20

                                @Kris Maybe try fakesink instead?

                                KrisK 2 Replies Last reply
                                0
                                • Eric KatzfeyE Eric Katzfey

                                  @Kris Maybe try fakesink instead?

                                  KrisK Offline
                                  KrisK Offline
                                  Kris
                                  Regular
                                  wrote on last edited by Kris
                                  #21

                                  @Eric-Katzfey
                                  I have tried both fakesink and playbin.
                                  Neither of them work either.
                                  Has anyone gotten gstreamer to successfully work on VOXL1?

                                  Eric KatzfeyE 1 Reply Last reply
                                  0
                                  • Eric KatzfeyE Eric Katzfey

                                    @Kris Maybe try fakesink instead?

                                    KrisK Offline
                                    KrisK Offline
                                    Kris
                                    Regular
                                    wrote on last edited by Kris
                                    #22

                                    @Eric-Katzfey
                                    I also have another UVC camera, but it only outputs MJPG (compressed) and YUY2 (uncompressed 640x480 30fps) formats.

                                    It works for streaming, but I am trying to record the video to the Seeker’s SD card.
                                    Is there a way to do this with Gstreamer or a similar program?

                                    1 Reply Last reply
                                    0
                                    • tomT tom

                                      @Kris You can't use autovideosink on VOXL because it doesn't have a display

                                      KrisK Offline
                                      KrisK Offline
                                      Kris
                                      Regular
                                      wrote on last edited by
                                      #23

                                      @tom
                                      Could this be the reason why no devices are found when I use gst-device-monitor-1.0 Video/Source on the VOXL1?

                                      1 Reply Last reply
                                      0
                                      • KrisK Offline
                                        KrisK Offline
                                        Kris
                                        Regular
                                        wrote on last edited by
                                        #24

                                        I see that the VOXL1 has the gst-plugins-good.
                                        Is it possible to also add the gst-plugins-bad and gst-plugins-ugly?

                                        1 Reply Last reply
                                        0
                                        • KrisK Kris

                                          @Eric-Katzfey
                                          I have tried both fakesink and playbin.
                                          Neither of them work either.
                                          Has anyone gotten gstreamer to successfully work on VOXL1?

                                          Eric KatzfeyE Offline
                                          Eric KatzfeyE Offline
                                          Eric Katzfey
                                          ModalAI Team
                                          wrote on last edited by
                                          #25

                                          @Kris We use GStreamer in our voxl-streamer application. It does work on VOXL1.

                                          KrisK 2 Replies Last reply
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