# Getting voxl-streamer running Source: https://forum.modalai.com/topic/79/getting-voxl-streamer-running Category: General Questions (https://forum.modalai.com/category/2/general-questions) Posted: 2021-01-05 16:01:41 UTC by MattO Replies: 16 · Views: 3394 ## MattO · 2021-01-05 16:01:41 UTC Hello, I'm working to get voxl-camera-server and voxl-streamer going to get the cameras oriented right-side up, and then view them on a host ground station laptop. I went and loaded the beta 3.1.0 image that was sent, that all went well. Then, using the emulator, build and loaded libmodal_json, voxl-camera-server, and voxl-streamer. I also went through the voxl-configure-cameras and voxl-configure-modem scripts for setup. See screenshots for camera-server and streamer, it looks like camera-server starts properly, however streamer throws an error message. Any ideas on what this could be? Thanks. ![cam-server.png](https://forum.modalai.com/assets/uploads/files/1609862484517-cam-server.png) ![streamer-error.png](https://forum.modalai.com/assets/uploads/files/1609862495863-streamer-error.png) ## Reply by Eric Katzfey (ModalAI staff) · 2021-01-05 16:58:30 UTC If you try to build from scratch on the master branch you will have a version skew and see these errors. You need to be using the dev branch if you are building from source. I would recommend, however, before doing that, to try using our prebuilt binaries from our package repo to make sure everything is working properly. First, reflash system image 3.1.0 on to the board. Then, on target, follow these steps: 1. Setup Internet access (e.g. WiFi), then reboot 2. Verify Internet connectivity 3. Edit /etc/opkg/opkg.conf to uncomment the last line. This will give you access to our dev package repo at http://voxl-packages.modalai.com/dev/ 4. opkg update 5. opkg install voxl-camera-server 6. opkg install voxl-streamer ## Reply by MattO · 2021-01-05 20:07:10 UTC @Eric-Katzfey, thanks. I followed the steps, and voxl-camera-server won't run now. See attached image. When I loaded 3.1.0, I chose to wipe the /data/ partition. When finished loading, I allowed it to do the auto download and install of packages. Then, I did voxl-configure-cameras, voxl-configure-modem, and voxl-configure-docker-support. Not sure if there is anything else needed. ![cam-server-dev-norun.png](https://forum.modalai.com/assets/uploads/files/1609877094930-cam-server-dev-norun.png) ## Reply by Eric Katzfey (ModalAI staff) · 2021-01-05 21:33:11 UTC Okay, so don't do the auto download and install of packages after flashing system image 3.1.0. And don't run any of the voxl-configure-* scripts. See if you can just flash system image 3.1.0 without any other packages and then run the steps. ## Reply by MattO · 2021-01-05 23:00:12 UTC @Eric-Katzfey Ok, that worked. Fresh image with just camera server and streamer. Was able to stream hi res over voxl wifi connection to VLC on a laptop. I'm going to try enabling things one step at a time and see how far I get. ## Reply by MattO · 2021-01-06 02:25:33 UTC Thanks for the help Eric. Currently I have pretty much the bare bones stuff installed, see screenshot below. camera-server and streamer up and running, and getting video on a host computer via VLC or QGC. I think we can consider this one solved! ![voxl-installed.png](https://forum.modalai.com/assets/uploads/files/1609899918398-voxl-installed.png) ## Reply by Guest · 2021-02-05 03:10:56 UTC For completeness here, you can start with a clean image, then: Update /etc/opkg/opkg.conf by un-commenting the last line for include development packages: src/gz dev http://voxl-packages.modalai.com/dev Ensure you're connected to the internet via voxl-wifi station mode. opkg update opkg install voxl-suite-dev ## Reply by Lynn Koudsi · 2021-02-27 00:28:54 UTC Hi @RichieRich @MattO , I've followed this thread cause I got the same issue when attempting to run voxl-streamer, but I'm now getting a different error after a clean installation of the image 3.1.1 without installing the voxl suite: ![ec8d21a1-dd75-4f51-8ac4-6319bd6b20b1-image.png](https://forum.modalai.com/assets/uploads/files/1614385614765-ec8d21a1-dd75-4f51-8ac4-6319bd6b20b1-image.png) This is all I have installed: ![ec8720d4-4c3d-4bb4-880e-b8d734fc0e86-image.png](https://forum.modalai.com/assets/uploads/files/1614385691569-ec8720d4-4c3d-4bb4-880e-b8d734fc0e86-image.png) Thank you in advance! ## Reply by Eric Katzfey (ModalAI staff) · 2021-02-27 19:26:38 UTC Our dev repo is very active and occasionally we end up with some dependency mismatches in it. I fixed the problem with voxl-streamer. Can you please start with a fresh install of the system image and follow the instructions in this thread to try again? It should all be working now. Thanks! ## Reply by Lynn Koudsi · 2021-02-27 19:56:10 UTC (in reply to Eric Katzfey) @Eric-Katzfey Hi Eric, Thanks for the reply! I actually found the issue. the camera server was broadcasting under `/run/mpa/hires_preview` when vox-streamer was looking for `run/mpa/hires/preview` so I just changed that value in the script and it works :) ## Reply by Eric Katzfey (ModalAI staff) · 2021-02-27 20:13:32 UTC (in reply to Lynn Koudsi) @Lynn-Koudsi Great! Yep, that was the issue :-) ## Reply by Dean Fortier · 2021-03-31 01:30:37 UTC (in reply to Lynn Koudsi) Hi @Lynn-Koudsi and @Eric-Katzfey, I am having the same issue as you Lynn where I am getting the error: ```shell yocto:/# voxl-streamer Using configuration file /etc/modalai/voxl-streamer.conf closing FDs for client channel 0 ERROR: Couldn't open MPA pipe /run/mpa/hires/preview/ ``` Where is the script where you changed `/run/mpa/hires_preview`? Thanks, Dean ## Reply by Eric Katzfey (ModalAI staff) · 2021-03-31 15:01:04 UTC @Dean-Fortier It is in the voxl-streamer configuration file. /etc/modalai/voxl-streamer.conf. ## Reply by Eric Katzfey (ModalAI staff) · 2021-03-31 16:10:24 UTC (in reply to Dean Fortier) @Dean-Fortier BTW, The latest software installer is now available at https://developer.modalai.com/asset. With the new release you won't need to modify the configuration file manually. (beta) VOXL Platform Release 3.2.0-0.3.4-b https://developer.modalai.com/asset/download/69 ## Reply by Dean Fortier · 2021-04-02 02:55:30 UTC (in reply to Eric Katzfey) Hi @Eric-Katzfey, Thanks for the tip, I installed the 3.2.0-0.3.4-b release and still have the same issue. Also I am not sure what to modify in the `voxl-streamer.conf` file. I modified line 6 from: ```json "mpa-camera": "hires_preview" }, ``` to: ```json "mpa-camera": "hires/preview" }, ``` but I think I am missing something as I am getting the same error message. Thanks, Dean ## Reply by Eric Katzfey (ModalAI staff) · 2021-04-02 16:19:46 UTC (in reply to Dean Fortier) @Dean-Fortier The issue with the path was that, originally, it was specified as "hires/preview". This is where voxl-camera-server created the pipe and where voxl-streamer looked for it. In a newer version of voxl-camera-server, the name changed to "hires_preview". Until voxl-streamer was updated, you had to manually go into the configuration file and change it yourself. Now voxl-streamer has been updated and the manual change is no longer necessary. That is what is in 3.2.0-0.3.4-b. You can take a look at the directories yourself to see what voxl-camera-server is doing. After a power cycle and before you start voxl-camera-server you should see something like this: ``` yocto:/run/mpa# ls imu0 imu1 ``` And then after starting voxl-camera-server you will see the new directories: ``` yocto:/run/mpa# ls hires_preview imu0 imu1 stereo tracking ``` If you don't see those directories then the problem is somewhere else. ## Reply by Dean Fortier · 2021-04-02 17:39:46 UTC @Eric-Katzfey Thanks for the explanation, I was not starting the `voxl-camera-server` before. When I started the `voxl-camera-server`, I had my camera configuration include the tracking camera which stopped the `voxl-camera-server` from starting correctly. Once I changed my camera configuration with `voxl-configure-cameras` to "hires only" I was able to start the camera server and then start the `voxl-streamer` as well.