Video encoding library initialization failed, encoding features are not available.

[leeyngdo]

Hello, thank you for the great work! I'm trying to import "from plotoptix import TkOptiX" on the remote server, but I encountered the following error:

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Video encoding library initialization failed, encoding features are not available.

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    [0]: NVIDIA GeForce RTX 2080 Ti

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I'm working with an RTX 2080 Ti, Driver Version: 535.161.08 and CUDA Version: 12.2. Also FFmpeg == 7.0 and I downloaded tkinter and PyQt but still not works.. What can I try to resolve this error? Thank you!

[robertsulej]

Your ffmpeg libs are apparently not visible to plotoptix. Let me check how the ffmpeg installation is now proceeding in linux, I'll let you know later today.

[leeyngdo]

Thank you for your fast response! I'm also considering downgrading FFmpeg, but I'm not sure if that will work..

[robertsulej]

I need to update the code to use ffmpeg API available with the 7.0 release. Tomorrow should be ready.

[leeyngdo]

Hello, could you let me know when it will be updated?

[robertsulej]

Sure, I'll let you know. There is some more to do since the new ffmpg dll is too large to include it in the package and the Windows binaries need changes.

[robertsulej]

Updated code is in this branch. It should work with ffmpeg 7 installed as in the README, with shared libs (both, windows and linux, are updated).

[leeyngdo]

Hi, thank you for the update! However, my error is still not resolved and I think something else is the problem. So I also tried v0.18.1 with a downgraded version of FFmpeg (5.1.4), but same error occurs.. Is there anything that I can try to resolve this error?

[robertsulej]

OK, maybe something else is blocking you. Please, try plotoptix v0.18.1 and ffmpeg 4.1.11. That ffmpeg was used to prepare several plotoptix release and is well tested.

[leeyngdo]

I'm using Ubuntu 20.04 and downloaded ffmpeg 4.1.11 in this page. Now I could import TkOptiX, but it outputs the following error when I run the example code

import numpy as np
from plotoptix import TkOptiX

n = 1000000                                  # 1M points, better not try this with matplotlib
xyz = 3 * (np.random.random((n, 3)) - 0.5)   # random 3D positions
r = 0.02 * np.random.random(n) + 0.002       # random radii

plot = TkOptiX()
plot.set_data("my plot", xyz, r=r)
plot.show()

[0]: NVIDIA GeForce RTX 2080 Ti Selected devices: [0] Primary device: 0 Exception in thread Thread-1: Traceback (most recent call last): File "/root/anaconda3/envs/optix/lib/python3.10/threading.py", line 1016, in _bootstrap_inner self.run() File "/root/anaconda3/envs/optix/lib/python3.10/site-packages/plotoptix/npoptix.py", line 495, in run self._run_event_loop() File "/root/anaconda3/envs/optix/lib/python3.10/site-packages/plotoptix/tkoptix.py", line 166, in _run_event_loop self._root = tk.Tk() File "/root/anaconda3/envs/optix/lib/python3.10/tkinter/init.py", line 2299, in init self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use) _tkinter.TclError: no display name and no $DISPLAY environment variable minor Version (60) newer than tool (should be 59) minor NvvmIRVersion (63) newer than tool (should be 58) [ 2][ COMPILER]: COMPILE ERROR:

[robertsulej]

OK, now the issue is to configure the remote display. Please, try usual instructions, eg like this one.

[leeyngdo]

Thanks! The following is remaining error message I got:

minor Version (60) newer than tool (should be 59) minor NvvmIRVersion (63) newer than tool (should be 58) [ 2][ COMPILER]: COMPILE ERROR:

OPTIX_ERROR_INVALID_INPUT: Optix call 'optixModuleCreate( m_context, &m_module_compile_options, &m_pipeline_compile_options, ptx.data(), ptx.size(), log, &sizeof_log, &mnew )' failed: Modules.cpp:49) Log: COMPILE ERROR:

and nothing is rendered in the screen:

I think this error might be related to this version mismatch, right?

[robertsulej]

Yes, the driver update should help. Shaders were compiled with CUDA 12.3 and it may require the driver release >= 545.23.

[leeyngdo]

Finally it works after I upgrade CUDA & NVIDIA driver. Thank you for your kind answer!

[robertsulej]

Great! I'll check what could be a problem with ffmpeg 7.0 in the new code and let you know.