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uvc_get_stream_ctrl_format_size failed

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  • tomT tom

    @Kris You can see supported format info here: https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/master/src/main.c#L64

    Another thing to try out is using gstreamer instead of voxl-uvc-server + voxl-streamer with a pipeline similar to the following:

    gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.97 port=8554

    The pipeline may need to be tweaked slightly but it's one I've used before for other UVC cameras that voxl-uvc-server was unhappy with

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

    @tom
    Thank you, I will give this a try.
    I am trying to use H.264 on this camera.
    This is the second UVC camera that I’ve purchased because I am trying to log the frames from voxl-logger. From what I understand, H.264 output is the format that can do this.
    Is there a way to call for only the /dev/video2 to start with the voxl-uvc-server or gstreamer?
    Does the voxl-uvc-server accept h264 1920x1080 @30fps?

    1 Reply Last reply
    0
    • tomT tom

      @Kris You can see supported format info here: https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/master/src/main.c#L64

      Another thing to try out is using gstreamer instead of voxl-uvc-server + voxl-streamer with a pipeline similar to the following:

      gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.97 port=8554

      The pipeline may need to be tweaked slightly but it's one I've used before for other UVC cameras that voxl-uvc-server was unhappy with

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

      @tom
      Do I paste this in the voxl terminal?

      gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.97 port=8554
      

      Does this have uvc frame or video capture capabilities?

      1 Reply Last reply
      0
      • tomT tom

        @Kris You can see supported format info here: https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/master/src/main.c#L64

        Another thing to try out is using gstreamer instead of voxl-uvc-server + voxl-streamer with a pipeline similar to the following:

        gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.97 port=8554

        The pipeline may need to be tweaked slightly but it's one I've used before for other UVC cameras that voxl-uvc-server was unhappy with

        KrisK Offline
        KrisK Offline
        Kris
        Regular
        wrote on last edited by
        #24

        @tom
        Sorry to bother you again, but I am not seeing the h264 format supported in the main.c script you provided for the voxl-uvc-server. Is it possible to edit the voxl-uvc-server main.c script to accept h264 format at 1920x1080 @30fps?

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        • tomT Offline
          tomT Offline
          tom
          admin
          wrote on last edited by
          #25

          @Kris You can read more about how gstreamer and the gst-launch-1.0 command works here: https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html?gi-language=c

          Yes, you would run that command on VOXL2. That specific command pulls frames from /dev/video22 (the UVC camera), it tells it to expect YUY2 formatted frames (you can change this to your liking) and then it converts it to an RTSP video stream. You could modify the pipeline to instead write to a file instead of streaming.

          There is a ton of documentation on gstreamer out there that can help you out with tailoring the pipeline.

          KrisK 1 Reply Last reply
          0
          • tomT tom

            @Kris You can read more about how gstreamer and the gst-launch-1.0 command works here: https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html?gi-language=c

            Yes, you would run that command on VOXL2. That specific command pulls frames from /dev/video22 (the UVC camera), it tells it to expect YUY2 formatted frames (you can change this to your liking) and then it converts it to an RTSP video stream. You could modify the pipeline to instead write to a file instead of streaming.

            There is a ton of documentation on gstreamer out there that can help you out with tailoring the pipeline.

            KrisK Offline
            KrisK Offline
            Kris
            Regular
            wrote on last edited by
            #26

            @tom
            Ok, thank you for the explanation.
            I will read up on gstreamer and try to figure this out.
            You mentioned that I would run this on VOXL2.
            I dont have a VOXL2. Does this work on VOXL for the Seeker?

            1 Reply Last reply
            0
            • tomT Offline
              tomT Offline
              tom
              admin
              wrote on last edited by
              #27

              @Kris Apologies, I'm not sure if that will work on VOXL1. Do you have a hires mipi sensor on your VOXL? It would allow you to avoid a lot of trouble

              KrisK 3 Replies Last reply
              0
              • tomT tom

                @Kris Apologies, I'm not sure if that will work on VOXL1. Do you have a hires mipi sensor on your VOXL? It would allow you to avoid a lot of trouble

                KrisK Offline
                KrisK Offline
                Kris
                Regular
                wrote on last edited by Kris
                #28

                @tom
                No, I dont have a hires mipi sensor on my VOXL. I am using the TOF, Stereo, and Tracking sensors specifically for indoor flights.
                I am just trying to record frames or video from a connected uvc camera while in flight.
                I am also trying to set one of my stereo cameras as the QVIO instead of the tracking camera. Again this is just for indoor flights. I have also asked about this QVIO setup in this thread, but have not received a response other than pointing to the extrinsics ModalAi page.

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                0
                • tomT tom

                  @Kris Apologies, I'm not sure if that will work on VOXL1. Do you have a hires mipi sensor on your VOXL? It would allow you to avoid a lot of trouble

                  KrisK Offline
                  KrisK Offline
                  Kris
                  Regular
                  wrote on last edited by Kris
                  #29

                  @tom
                  The command you sent me earlier this week did not work on the VOXL platform. I tried variations on both our e-CAM83 and Aruducam IMX335 uvc camera modules.

                  Could you please point me to a uvc camera that will work with the voxl-uvc-server?
                  Our main goal is to connect a uvc camera to the Seeker and be able to capture frames or video (streaming is not necessary) and send them to an onboard SD card (possibly using voxl-logger.

                  Would this Blue Robotics uvc module work? Meaning, is it capable of connecting to the voxl-uvc-server and be able to send frames and/or video to the onboard SD card using voxl-logger on the VOXL1 Seeker Dev Drone?

                  1 Reply Last reply
                  0
                  • tomT tom

                    @Kris Apologies, I'm not sure if that will work on VOXL1. Do you have a hires mipi sensor on your VOXL? It would allow you to avoid a lot of trouble

                    KrisK Offline
                    KrisK Offline
                    Kris
                    Regular
                    wrote on last edited by
                    #30

                    @tom
                    I have also noticed that when I updated my platform to 0.9 the streamer.conf has changed.
                    Now our Arducam IMX335 is not even working (it had no problems streaming before).

                    0.9 streamer.conf

                    {
                            "input-pipe":   "hires",
                            "bitrate":      1000000,
                            "decimator":    2,
                            "port": 8900,
                            "rotation":     0
                    }
                    

                    3.8.0-0.7 streamer.conf

                    {
                        "conf-version":"1.3",
                        "configuration": "hires",
                        "uvc-generic": {
                            "input": {
                                "interface": "mpa",
                                "mpa-camera": "uvc" },
                            "output": {
                                "stream": {
                                    "rotation": 0,
                                    "width": 640,
                                    "height": 480,
                                    "decimator": 1,
                                    "bitrate": 1000000 } }
                        },
                        "uvc-flir-boson": {
                            "input": {
                                "interface": "mpa",
                                "mpa-camera": "uvc" },
                            "output": {
                                "stream": {
                                    "rotation": 0,
                                    "width": 640,
                                    "height": 512,
                                    "decimator": 2,
                                    "bitrate": 1000000 } }
                        },
                        "uvc-flir-lepton": {
                            "input": {
                                "interface": "mpa",
                                "mpa-camera": "uvc" },
                            "output": {
                                "stream": {
                                    "rotation": 0,
                                    "width": 160,
                                    "height": 120,        
                                    "bitrate": 500000 } } 
                        },                                
                        "hires": {                        
                            "input": {                    
                                "interface": "mpa",       
                                "mpa-camera": "hires" },  
                            "output": {                   
                                "stream": {               
                                    "rotation": 0,        
                                    "width": 640,         
                                    "height": 480,        
                                    "decimator": 2,       
                                    "bitrate": 1000000 } }
                        },                                
                        "hires-logo": {                   
                            "input": {                    
                                "interface": "mpa",       
                                "mpa-camera": "hires" },  
                            "output": {                   
                                "stream": {               
                                    "rotation": 0,        
                                    "width": 640,         
                                    "height": 480,        
                                    "decimator": 2,       
                                    "bitrate": 1000000 } },
                            "overlay": {                   
                                "location": "/etc/modalai/modalai.png",
                                "offset_x": -1,                        
                                "offset_y": -1 }                       
                        },                                             
                        "stereo": {                                    
                            "input": {                                 
                                "interface": "mpa",                    
                                "mpa-camera": "stereo" },              
                            "output": {                                
                                "stream": {                            
                                    "width": 640,                      
                                    "height": 960,                     
                                    "decimator": 2,                    
                                    "bitrate": 1000000 } }             
                        },                                             
                        "tracking": {                                  
                            "input": {                                 
                                "interface": "mpa",                    
                                "mpa-camera": "tracking" },            
                            "output": {                                
                                "stream": {                            
                                    "width": 640,                      
                                    "height": 480,                     
                                    "decimator": 2,                    
                                    "bitrate": 1000000 } }             
                        },                                             
                        "dfs-disparity": {                             
                            "input": {                                 
                                "interface": "mpa",                    
                                "mpa-camera": "dfs_disparity" },       
                            "output": {                                
                                "stream": {                            
                                    "width": 640,                      
                                    "height": 480,                     
                                    "decimator": 2,                    
                                    "bitrate": 1000000 } }             
                        },                                             
                        "qvio-overlay": {                              
                            "input": {                                 
                                "interface": "mpa",                    
                                "mpa-camera": "qvio_overlay" },        
                            "output": {                                
                                "stream": {                            
                                    "width": 640,                      
                                    "height": 544,                     
                                    "decimator": 2,                    
                                    "bitrate": 1000000 } }             
                        },                                             
                        "tflite-overlay": {                            
                            "input": {                                 
                                "interface": "mpa",                    
                                "mpa-camera": "tflite" },              
                            "output": {                                
                                "stream": {                            
                                    "width": 640,                      
                                    "height": 480,                     
                                    "decimator": 2,                    
                                    "bitrate": 1000000 } }             
                        },                                             
                        "hdmi-mpa": {                                  
                            "input": {                                 
                                "interface": "mpa",                    
                                "mpa-camera": "v4l2" },                
                            "output": {                                
                                "stream": {                            
                                    "width": 640,                      
                                    "height": 360,                     
                                    "decimator": 2,                    
                                    "bitrate": 1000000 } }             
                        },                                             
                        "gphoto2-mpa": {                               
                            "input": {                                 
                                "interface": "mpa",                    
                                "mpa-camera": "gphoto2" },             
                            "output": {                                
                                "stream": {                            
                                    "width": 640,                      
                                    "height": 360,                     
                                    "decimator": 2,                    
                                    "bitrate": 1000000 } }             
                        },                                             
                        "video-test": {                                
                            "input": {                                 
                                "interface": "test",                   
                                "frame": {                             
                                    "width": 640,                      
                                    "height": 480,                     
                                    "format": "yuv420" } },            
                            "output": {                                
                                "stream": {                            
                                    "rotation": 0,                     
                                    "width": 640,                      
                                    "height": 480,                     
                                    "rate": 30,                        
                                    "bitrate": 1000000 } }             
                        },                                             
                        "uvc-video": {                                 
                            "input": {                                 
                                "interface": "uvc",                    
                                "device": "/dev/video0" },             
                            "output": {                                
                                "stream": {                            
                                    "rotation": 0,                     
                                    "width": 640,                      
                                    "height": 360,                     
                                    "rate": 15,                        
                                    "bitrate": 1000000 } }             
                        }                                              
                                                                       
                    }                           
                    
                    1 Reply Last reply
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                    • tomT tom

                      @Kris You can see supported format info here: https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/master/src/main.c#L64

                      Another thing to try out is using gstreamer instead of voxl-uvc-server + voxl-streamer with a pipeline similar to the following:

                      gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.97 port=8554

                      The pipeline may need to be tweaked slightly but it's one I've used before for other UVC cameras that voxl-uvc-server was unhappy with

                      KrisK Offline
                      KrisK Offline
                      Kris
                      Regular
                      wrote on last edited by
                      #31

                      @tom
                      Do you happen to know some Gstreamer commands for the Logitech C270 uvc camera?
                      I am trying to get either a streaming or recording command to work on the Seeker, with no luck so far.

                      1 Reply Last reply
                      0
                      • tomT Offline
                        tomT Offline
                        tom
                        admin
                        wrote on last edited by tom
                        #32

                        @Kris I don't have that specific webcam or a VOXL1 but with a different one and a VOXL2, all I have to do is run voxl-uvc-server, see output below:

                        voxl2:/$ voxl-uvc-server 
                        loading config file
                        Creating new config file: /etc/modalai/voxl-uvc-server.conf
                        =================================================================
                        width:                            640
                        height:                           480
                        fps:                              30
                        pipe_name:                        uvc
                        =================================================================
                        

                        I'm able to pull up the stream using voxl-portal (going to IP of my VOXL2 in browser)

                        8ff0d084-6556-4947-8dcb-9e8137d10ae1-image.png

                        Then alternatively I'm able to use this gstreamer command:

                        gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.124 port=8554
                        

                        to pull up the video stream in QGC

                        KrisK 1 Reply Last reply
                        0
                        • tomT Offline
                          tomT Offline
                          tom
                          admin
                          wrote on last edited by
                          #33

                          642ce503-f6b1-4999-9cf2-ba5ac5b8e504-image.png

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                          • tomT tom

                            @Kris I don't have that specific webcam or a VOXL1 but with a different one and a VOXL2, all I have to do is run voxl-uvc-server, see output below:

                            voxl2:/$ voxl-uvc-server 
                            loading config file
                            Creating new config file: /etc/modalai/voxl-uvc-server.conf
                            =================================================================
                            width:                            640
                            height:                           480
                            fps:                              30
                            pipe_name:                        uvc
                            =================================================================
                            

                            I'm able to pull up the stream using voxl-portal (going to IP of my VOXL2 in browser)

                            8ff0d084-6556-4947-8dcb-9e8137d10ae1-image.png

                            Then alternatively I'm able to use this gstreamer command:

                            gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.124 port=8554
                            

                            to pull up the video stream in QGC

                            KrisK Offline
                            KrisK Offline
                            Kris
                            Regular
                            wrote on last edited by
                            #34

                            @tom
                            Thank you for your examples.

                            I was asking about the C270 camera because @Eric-Katzfey had mentioned that he starts his camera testings with this model in order to locate where issues are coming from on other camera models.

                            I do appreciate your support.
                            I will continue to try different Gstreamer commands.

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                            • tomT Offline
                              tomT Offline
                              tom
                              admin
                              wrote on last edited by
                              #35

                              @Kris I understand, your solution will likely be similar to what I posted above

                              KrisK 1 Reply Last reply
                              0
                              • tomT tom

                                @Kris I understand, your solution will likely be similar to what I posted above

                                KrisK Offline
                                KrisK Offline
                                Kris
                                Regular
                                wrote on last edited by Kris
                                #36

                                @tom
                                I was able to stream the video from voxl-portal,

                                voxl:~$ voxl-uvc-server -d
                                Enabling debug messages
                                voxl-uvc-server starting
                                Image resolution 640x480, 30 fps chosen
                                UVC initialized
                                Device found
                                Device opened
                                uvc_get_stream_ctrl_format_size succeeded for format YUYV
                                Streaming starting
                                Got frame callback! frame_format = 3, width = 640, height = 480, length = 614400, ptr = (nil)
                                 * got image 30
                                 * got image 60
                                 * got image 90
                                 * got image 120
                                 * got image 150
                                

                                but I cannot get the Gstreamer to work for QGC.

                                Here is my ERROR;

                                voxl:~$ gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! omxh264enc ! rtph264pay name=pay0 ! udpsink host=192.168.110.152 port=8554
                                Setting pipeline to PAUSED ...
                                Pipeline is live and does not need PREROLL ...
                                Setting pipeline to PLAYING ...
                                New clock: GstSystemClock
                                **
                                ERROR:/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-omx/1.10.4-r0/gst-omx-1.10.4/omx/gstomxh264enc.c:532:gst_omx_h264_enc_get_caps: code should not be reached
                                Aborted
                                

                                Maybe its a CAPS issue?

                                I had to change x264 to omxh264, and had to completely remove speed-preset=ultrafast tune=zerolatency from the command because it wasnt playing well with VOXL1.

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                                • tomT Offline
                                  tomT Offline
                                  tom
                                  admin
                                  wrote on last edited by
                                  #37

                                  @Kris Well now that you have voxl-uvc-server working you should be able to use voxl-streamer on top of that to get a stream going

                                  KrisK 1 Reply Last reply
                                  0
                                  • tomT tom

                                    @Kris Well now that you have voxl-uvc-server working you should be able to use voxl-streamer on top of that to get a stream going

                                    KrisK Offline
                                    KrisK Offline
                                    Kris
                                    Regular
                                    wrote on last edited by Kris
                                    #38

                                    @tom
                                    Yes, I am able to get the stream working with the voxl-streamer -i uvc command,
                                    but I am trying to get a Gstreamer command working so that I can build a pipeline to record the frames.

                                    voxl:~$ voxl-streamer -i uvc
                                    ERROR: object missing input-pipe
                                    WARNING: Failed to get default pipe name from configuration file
                                    ERROR: object missing bitrate
                                    WARNING: Failed to get default bitrate from configuration file
                                    Camera server Connected
                                    Stream available at rtsp://127.0.0.1:8900/live
                                    

                                    Gstreamer;

                                    voxl:~$ show-video-device-info.sh
                                    /dev/video2: UVC Camera (046d:0825) 046d:0825
                                    voxl:~$ sudo gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,width=640,height=480,format=YUY2 ! videoconvert ! omxh264enc ! rtph264pay name=pay0 ! udpsink host=192.168.110.152 port=8554
                                    Setting pipeline to PAUSED ...
                                    Pipeline is live and does not need PREROLL ...
                                    Setting pipeline to PLAYING ...
                                    New clock: GstSystemClock
                                    **
                                    ERROR:/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-omx/1.10.4-r0/gst-omx-1.10.4/omx/gstomxh264enc.c:532:gst_omx_h264_enc_get_caps: code should not be reached
                                    

                                    or without width & height;

                                    voxl:~$ show-video-device-info.sh
                                    /dev/video2: UVC Camera (046d:0825) 046d:0825
                                    voxl:~$ sudo gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! omxh264enc ! rtph264pay name=pay0 ! udpsink host=192.168.110.152 port=8554
                                    Setting pipeline to PAUSED ...
                                    Pipeline is live and does not need PREROLL ...
                                    Setting pipeline to PLAYING ...
                                    New clock: GstSystemClock
                                    **
                                    ERROR:/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-omx/1.10.4-r0/gst-omx-1.10.4/omx/gstomxh264enc.c:532:gst_omx_h264_enc_get_caps: code should not be reached
                                    
                                    Eric KatzfeyE 1 Reply Last reply
                                    0
                                    • KrisK Kris

                                      @tom
                                      Yes, I am able to get the stream working with the voxl-streamer -i uvc command,
                                      but I am trying to get a Gstreamer command working so that I can build a pipeline to record the frames.

                                      voxl:~$ voxl-streamer -i uvc
                                      ERROR: object missing input-pipe
                                      WARNING: Failed to get default pipe name from configuration file
                                      ERROR: object missing bitrate
                                      WARNING: Failed to get default bitrate from configuration file
                                      Camera server Connected
                                      Stream available at rtsp://127.0.0.1:8900/live
                                      

                                      Gstreamer;

                                      voxl:~$ show-video-device-info.sh
                                      /dev/video2: UVC Camera (046d:0825) 046d:0825
                                      voxl:~$ sudo gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,width=640,height=480,format=YUY2 ! videoconvert ! omxh264enc ! rtph264pay name=pay0 ! udpsink host=192.168.110.152 port=8554
                                      Setting pipeline to PAUSED ...
                                      Pipeline is live and does not need PREROLL ...
                                      Setting pipeline to PLAYING ...
                                      New clock: GstSystemClock
                                      **
                                      ERROR:/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-omx/1.10.4-r0/gst-omx-1.10.4/omx/gstomxh264enc.c:532:gst_omx_h264_enc_get_caps: code should not be reached
                                      

                                      or without width & height;

                                      voxl:~$ show-video-device-info.sh
                                      /dev/video2: UVC Camera (046d:0825) 046d:0825
                                      voxl:~$ sudo gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! omxh264enc ! rtph264pay name=pay0 ! udpsink host=192.168.110.152 port=8554
                                      Setting pipeline to PAUSED ...
                                      Pipeline is live and does not need PREROLL ...
                                      Setting pipeline to PLAYING ...
                                      New clock: GstSystemClock
                                      **
                                      ERROR:/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-omx/1.10.4-r0/gst-omx-1.10.4/omx/gstomxh264enc.c:532:gst_omx_h264_enc_get_caps: code should not be reached
                                      
                                      Eric KatzfeyE Offline
                                      Eric KatzfeyE Offline
                                      Eric Katzfey
                                      ModalAI Team
                                      wrote on last edited by
                                      #39

                                      @Kris The intention with the Logitech camera was to use it with voxl-uvc-streamer as Tom pointed out. That way you have a complete working setup and then you can start changing one thing at a time to get to what you want. If you want to switch to a different camera then you can see the differences in the new camera from the Logitech camera and try to debug that way. If you want to add a record feature with GStreamer then you can fork our voxl-streamer code and add the functionality into that. If you want to do it with a gst-launch-1.0 command line pipeline then you are farther away from anything we currently support and it's going to be hard for us to offer much help. I do think that what you are trying to do should be possible.

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