gohai/processing-glvideo

SimpleCapture example failure

Closed this issue · 5 comments

jansensan commented

When running the SimpleCapture example, these errors are thrown:

MESA-LOADER: failed to retrieve device information
libGL error: MESA-LOADER: failed to retrieve device information
GLVideo requires the P2D or P3D renderer.

(java:769): GLib-CRITICAL **: g_error_free: assertion 'error != NULL' failed
  • I am running this example on a Raspberry Pi, with a fresh install of Raspbian.
  • The NoIR camera is connected properly, as running raspistill -o /home/pi/Downloads/test.jpg works properly.
  • The entry bcm2835_v4l2 is present in /etc/modules.

Any dependencies that could be missing or require an update in order for this to work?

The

gohai commented

@jansensan Not sure exactly what is going on, but the GLVideo requires the P2D or P3D renderer line indicates that the library was unable to get the EGL context.

Did you by chance modify the SimpleCapture example to use the default renderer rather than the P2D or P3D one? Did you change the GL driver to be used in raspbi-config? Are you running Wayland?

If you want to test against a known-good distribution, please consider downloading our Raspbian image with Processing pre-installed.

jansensan commented

No I didn't change anything in the example (and I rechecked after you asked, in case I did by mistake).

As for the GL driver, I didn't either. Which is sort of sad, because I wanted to use PixelFlow, but it requires GL.

Thanks for the suggestion about the Raspbian with Processing pre-installed, I will check that out.

gohai commented

There is GL out of the box - the reason I asked is because raspbi-config lets you choose between three different implementations ("Legacy", "Fake-KMS", and "KMS"). It's just that everything but the first (default) is currently not so well supported.

In case you're ever running the version of Raspbian that gave you this errors - could you test if regular P3D example sketches work for you?

jansensan commented

Well, I have no real good explanation to give you...

  • I ensured that the GL was set to legacy (which I remember setting as such, following the README instructions: "Do not enable the KMS OpenGL driver, but stick with the legacy one.")
  • I ran example code provided on the Processing P3D tutorial page, which ran properly.
  • I tried to run the SimpleCapture example again, and now it worked.

So I guess this issue could be closed, as it must have been some state of the Pi that didn't work properly. Sorry for the bother.

gohai commented

@jansensan Hm, that's so curious. I don't have an answer to this either - anyway, thank you for reporting, and following up to the initial report! Feel free to re-open if this happens to you again. Best!