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3drobotics / solodevguide

Solo Development Guide (SDG).
http://dev.3dr.com/
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Error creating multiple video processing endpoints #213

Open franknitty69 opened 9 years ago

franknitty69 commented 9 years ago

Following the steps in the topic Video Pipeline Internals (Advanced), issuing the modprobe v4l2loopback exclusive_caps=0,0 video_nr=1,2 results in a FATAL error. i've even installed gst-plugins-good-video4linux2 via smart. same error.

steps to reproduce

  1. connect to solo wifi
  2. on your computer issue the solo video acquire command
  3. ssh to solo and issue the _modprobe v4l2loopback exclusive_caps=0,0 videonr=1,2 command

result modprobe: FATAL: Module v4l2loopback not found.

expected result v4l2loopback driver should be activated

franknitty69 commented 9 years ago

issue still persists even after manually installing v4l2loopback via smart install v4l2loopback

Lybior commented 8 years ago

@franknitty69 Have you find solution for this? Thanks..

franknitty69 commented 8 years ago

No, the problem is still occurring. I even talked to developer of video4linux2. Issue is on the solo side.

GPSFan commented 8 years ago

Chances are this is because the kernel version running on the solo is not the same as the kernel version that v4l2loopback.ko was compiled for. smart wants to install: kernel-3.10.17-rt12-1.0.0-ga+g3f15a11-3.10.17-r0@imx6solo_3dr_1080p
kernel-image-3.10.17-rt12-1.0.0-ga+g3f15a11-3.10.17-r0@imx6solo_3dr_1080p
kernel-module-v4l2loopback-0.9.1-r0@imx6solo_3dr_1080p
v4l2loopback-0.9.1-r0@imx6solo_3dr_1080p

but the kernel on my solo is: root@3dr_solo:~# uname -a Linux 3dr_solo 3.10.17-rt12-1.0.0_ga+g4176d57 #8 SMP PREEMPT Wed Nov 18 20:27:35 UTC 2015 armv7l GNU/Linux

Lybior commented 8 years ago

Is it hard to compile it right? Anyone capable of doing so?

GPSFan commented 8 years ago

It is easy to compile once you have the specific kernel version .config, patches and source. Most of which are available. I compiled the older kernel from the source provided by 3dr, as well as v4l2loopback.ko. Unfortunately as stated before, that is not what is running on Solo so unless I want to replace the kernel and ALL the modules or revert back to what Solo was running before the 1.3.0 update I/you/anyone needs EXACTLY what 3dr used as source. I opened issue 256 on solodevguide GitHub, but have yet to receive any response from 3dr.