pyglet.gl.ContextException: Could not create GL context

[AmoghTiwari]

Traceback (most recent call last):
File "humor/fitting/viz_fitting_rgb.py", line 467, in
main(args)
File "humor/fitting/viz_fitting_rgb.py", line 342, in main
img_extn=IM_EXTN)
File "/data/amogh/tcs_related/humor/humor/fitting/../viz/utils.py", line 182, in viz_smpl_seq
default_cam_rot=cam_rot)
File "/data/amogh/tcs_related/humor/humor/fitting/../viz/mesh_viewer.py", line 108, in init
self.viewer = pyrender.OffscreenRenderer(*self.figsize, point_size=2.75)
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyrender/offscreen.py", line 31, in init
self._create()
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyrender/offscreen.py", line 149, in _create
self._platform.init_context()
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyrender/platforms/pyglet_platform.py", line 52, in init_context
width=1, height=1)
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyglet/window/xlib/init.py", line 173, in init
super(XlibWindow, self).init(*args, **kwargs)
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyglet/window/init.py", line 606, in init
context = config.create_context(gl.current_context)
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyglet/gl/xlib.py", line 204, in create_context
return XlibContextARB(self, share)
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyglet/gl/xlib.py", line 314, in init
super(XlibContext13, self).init(config, share)
File "/data/groot/miniconda3/envs/humor_env/lib/python3.7/site-packages/pyglet/gl/xlib.py", line 218, in init
raise gl.ContextException('Could not create GL context')
pyglet.gl.ContextException: Could not create GL context

[AmoghTiwari]

I was able to solve this by placing the below-mentioned line in the humor/viz/mesh_viewer.py file, AFTER the import os line

os.environ['PYOPENGL_PLATFORM'] = 'egl'

This issue is related to offscreen rendering. See https://pyrender.readthedocs.io/en/latest/examples/offscreen.html for details.

Issue #15 also discusses the same problem and suggests an alternate way to resolve it.