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    VOXL camera configuration

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    • 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
                                  • Eric KatzfeyE
                                    Eric Katzfey ModalAI Team @Kris
                                    last edited by

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

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

                                      @Eric-Katzfey
                                      Ok, thank you for the confirmation.

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

                                        @Eric-Katzfey
                                        If possible, could you please provide me with a VOXL1 working pipeline (streaming or recording) using any UVC camera of your choice?

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

                                          @Kris That's not how it works on VOXL1. The voxl-uvc-server application places frames into an MPA pipe and the voxl-streamer application (based on gstreamer) reads those frames and processes them for output using RTSP. However, I do believe that I did try command line gst-launch-1.0 style pipelines with UVC cameras in the past and they worked. I don't have an example of one though. You may want to start with one of our supported UVC cameras first and then try to get your particular UVC camera working. I always start with the Logitech C270. We list the specific cameras that we support because each one caused us some issues and required code changes to make it work. We even had to fork the libuvc library in order to make changes to that to get some of the cameras working properly.

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

                                            @Eric-Katzfey
                                            Ok, I understand.
                                            Thank you for all your help and support with this issue.
                                            I will try one of your tested & supported UVC cameras.

                                            1 Reply Last reply Reply Quote 0
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