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    VOXL camera configuration

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    • KrisK
      Kris @Chad Sweet
      last edited by

      @Chad-Sweet
      The gstreamer commands work on my Linux PC.
      I am able to stream and record video when my UVC 2.0 camera is plugged directly into my Linux PC.
      I just have to change some of the pipeline, because x264enc is not recognized on the VOXL. I use x264enc on my PC and omxh264enc on the VOXL.
      I am using the e-CAM83 UVC 2.0 camera.
      There is detailed information about this camera in this post.

      1 Reply Last reply Reply Quote 0
      • KrisK
        Kris @Chad Sweet
        last edited by

        @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 Reply Quote 0
        • KrisK
          Kris @Chad Sweet
          last edited by Kris

          @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 Reply Quote 0
          • Chad SweetC
            Chad Sweet ModalAI Team
            last edited by

            This post is deleted!
            1 Reply Last reply Reply Quote 0
            • Chad SweetC
              Chad Sweet ModalAI Team
              last edited by

              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 Reply Quote 0
              • KrisK
                Kris @Chad Sweet
                last edited by

                @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 Reply Quote 0
                • Chad SweetC
                  Chad Sweet ModalAI Team
                  last edited by

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

                  Chad SweetC 1 Reply Last reply Reply Quote 0
                  • Chad SweetC
                    Chad Sweet ModalAI Team @Chad Sweet
                    last edited by

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

                    KrisK 2 Replies Last reply Reply Quote 0
                    • KrisK
                      Kris @Chad Sweet
                      last edited by

                      @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 Reply Quote 0
                      • KrisK
                        Kris @Chad Sweet
                        last edited by 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 1 Reply Last reply Reply Quote 0
                        • Eric KatzfeyE
                          Eric Katzfey ModalAI Team @Kris
                          last edited by

                          @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 Reply Quote 0
                          • KrisK
                            Kris @Eric Katzfey
                            last edited by

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

                            1 Reply Last reply Reply Quote 0
                            • KrisK
                              Kris @Eric Katzfey
                              last edited by 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 1 Reply Last reply Reply Quote 0
                              • KrisK
                                Kris @Kris
                                last edited by 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 1 Reply Last reply Reply Quote 0
                                • tomT
                                  tom admin
                                  last edited by

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

                                  KrisK 1 Reply Last reply Reply Quote 0
                                  • Eric KatzfeyE
                                    Eric Katzfey ModalAI Team @Kris
                                    last edited by

                                    @Kris Maybe try fakesink instead?

                                    KrisK 2 Replies Last reply Reply Quote 0
                                    • KrisK
                                      Kris @Eric Katzfey
                                      last edited by 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 1 Reply Last reply Reply Quote 0
                                      • KrisK
                                        Kris @Eric Katzfey
                                        last edited by Kris

                                        @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 Reply Quote 0
                                        • KrisK
                                          Kris @tom
                                          last edited by

                                          @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 Reply Quote 0
                                          • KrisK
                                            Kris
                                            last edited by

                                            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 Reply Quote 0
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