VOXL-CAM

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  voxl-cam camera-server crash
  • patrickpoirier  

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  @modaltb I sent it for repair You fond an issue with bad connexion on camera I received it back It is working OK BUT I have an other issue regarding connecting to ArduPilot It seems it is having issue with MavLink Message : voxl-mavlink-server[3036]: ERROR message magic number wrong #284 And it seems to reconnect under a different ID Do you have a clue? Do you want me to open a new issue so we can follow more efficiently ? Regards
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  Stereo camera does not appear in Camera Calibrator Overlay
  • Troi  

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  @Troi said in Stereo camera does not appear in Camera Calibrator Overlay: Hello, I am trying to calibrate the stereo camera using the instructions on the website (https://docs.modalai.com/calibrate-cameras/). I use the following command to start the calibration process: voxl-calibrate-camera stereo -l 0.04 -s 4x7 I tried to view the calibration progress via the voxl-portal's Camera Calibrator Overlay. The Camera Calibrator Overlay option appears in the voxl-portal drop-down menu. However, the stereo view with overlay never appears. When I try to exit camera calibration (via Ctrl + C), the program hangs and I have to exit the terminal to stop the program. What should I do to solve the issue with the camera calibrator overlay and the stereo camera calibration? I am having the same issue, any help will be appreciated. @Troi How did you resolve this?
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  No points from stereo cameras
  • LaurenzB  

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  I just found out, that the voxl-dfs-server is disabled at default. So I run systemctl enable voxl-dfs-server and it worked fin.
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  rx-tx from v2 to voxl
  • jconk  

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  @Adrian-Hidalgo said in rx-tx from v2 to voxl: px4_uart_bus": 12, for J11 connection worked transmitting data now
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  Problem with bitrate and omx encoder
  • Amither  

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  Hi, In addition, when trying to work with the OMX h264enc plugin provided by Qualcomm, I am facing the following issues - The picture is completely distorted as can be seen here - https://www.youtube.com/watch?v=niex_WXB6iI The CLI command is sudo gst-rtsp-launch "( qtiqmmfsrc camera=1 device=hires latency=0 ! video/x-raw,width=640,height=480,format=NV12,framerate=30/1 ! omxh264enc qos=1 ! video/x-h264, profile=(string)high, width=(int)640, height=(int)480, framerate=(fraction)30/1, format=(string)NV12, interlace-mode=(string)progressive, chroma-format=(string)4:2:0,profile-level-id=428014 ! h264parse ! rtph264pay name=pay0 pt=96 )" I did manage to receive a clear stream by using Qualcomm's SDK and Qmmf server - https://www.youtube.com/watch?v=e0B045-gBUA with the following CLI command sudo gst-rtsp-launch "( qtiqmmfsrc camera=1 device=hires video_0::bitrate=1200000 ! video/x-h264,width=640,height=480,format=NV12,framerate=30/1 ! h264parse ! rtph264pay name=pay0 pt=96 )" In case that i tried to use voxlsrc with omxh264enc that rides over voxl-camera-server. I see grainy picture, omxh264enc cant handle low bitrate in that situation. https://www.youtube.com/watch?v=UXO9PGNwfE8 voxlsrc device=hires ! video/x-raw,width=640,height=480,format=NV12,framerate=30/1 ! videoconvert ! omxh264enc control-rate=2 target-bitrate=1200000 ! video/x-h264,width=640,height=480,profile=main ! h264parse ! rtph264pay name=pay0 pt=96 Our scenario requires having two different streams, one is encoded and the other is a raw output. Our current setups works with Gstreamer and v4l2src, v4l2h264enc. Since VOXL uses a Qualcomm based board I tried converting the current implementation to use Gstreamer with Qmmfsrc, voxlsrc (my own plugin), omxh264enc. My question is how can i make the omxh264enc work with qmmfsrc or voxlsrc ? I hope this clarifies the situation. Thanks, Amit
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  What is the spec of Starvis IMX412 w/ M12-style Lens?
  • DanChang  

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  SLAM Capabilities
  • tmendoza  

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  The VOXL CAM is a development kit for SLAM that comes with a number of reference implementations. None of the reference implementations require a closed loop. voxl-qvio-server provides a dead reckoning service based on visual inertial odometry voxl-mapper provides a mapping and planning service for navigating congested spaces
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  Rotate the TOF sensor for proper orientation in portal?
  • Bulldog357  

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  VOXL-2 Version of Cam?
  • Andy Jarosz  

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  It is on the roadmap! Hopefully in the next 6 months or so
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  Scratch/Adhesive on One of Stereo Cameras
  • John Racette  

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  It's possible that the lens has been knocked out of focus. See @Dobry-Kolacz 's write-up here on addressing that issue: https://forum.modalai.com/topic/1362/sentinel-stereo-camera-calibration-inconsistency/4?_=1674364904154 "To adjust the focus on our stereo cameras twist the lens housing clockwise or counterclockwise similarly to how you would on a DSLR lens. Look closely at the stereo cams and you will see 4 flat edges. I recommend using a 6mm wrench to engage 2 of the flat edges; from there you'll be able to rotate and adjust the lens as needed. It is possible to use something like tweezers or small pliers to accomplish this however I recommend against that method because it is too easy for the tool to slip off and end up scratching the lens. To clean the lens I recommend using a clean microfiber cloth, a lens tissue, or a fresh q-tip"
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  VOXL-CAM LTE connection
  • yhcho61  

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  @yhcho61 If you're asking where to plug in the antennas to the Voxl-Cam, then most times the Voxl-Cam has extensions from which to attach the LTE antennas to. If it didn't, you would just need to take the backpack off and thread the antenna through the slot of the backpack and plug them in to the modem. Reattach the backpack and then initialize the modem to use it.
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  Tracking Camera's Pixel and Lens Sizes
  • Troi  

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  just updated datasheet link to https://www.ovt.com/wp-content/uploads/2022/01/OV7251-PB-v1.9-WEB.pdf thanks for pointing out
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  Dark image from tracking cam
  • bensusana  

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  Hi, What software version are you running? This was an issue we saw commonly on some of our older software versions but fixed in our release of SDK 0.7 with the addition of a new exposure algorithm. You can check the software version on the drone by running voxl-version.
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  Why costs are showing too huge? is there any bug?
  • SWARNA MOHAN CHANDRA KANTH  

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  Doubts regarding collision avoidance and collision prevention.
  • Anubhav  

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  I'm not 100% sure but I think you can check if you have publish /mavros/companion_process/status with component value 196 correctly, it should be publish by px4 avoidance automatically if your setup is good.
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  Tilting the VOXL CAM forward
  • Sem Andeweg  

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  Hey @Steve-Turner, thanks for your answer, I will take a look into it!
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  VOXL CAM Fully Integrated Robot Perception System Drift
  • Enstrom1  

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  @Enstrom1, I would have to direct you to either @RichieRich or @Jeremy-Schmidt. I do know that VIO needs to be able to see contrasts and objects fairly clearly to work at it's best.
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  Problem with voxl-camera-server
  • Anubhav  

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  Hi Alex, I have noticed following things: When I am using camera-configuration of stereo+tracking, camera server is not stopping after enabling and starting dfs server. When I am using camera-configuration of tof+stereo+tracking, camera server is stopping after enabling and starting dfs server. Tof sensor is working fine when not using dfs server. So, the problem of camera server getting stop with the configuration of tof+stereo+tracking and after enabling and starting dfs server a hardware issue? Does collision prevention works without the depth from stereo server instead just with the depth from tof sensor? Thanks! Anubhav
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  This topic is deleted!
  • Anubhav  

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  Error: Requesting home position
  • Anubhav  

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