Cannot load torchcodec

Beginners
3

Hello, Thank you so much for the answer!

However.. I still don’t know why I got the same error…

I made a new venv, activated it and installed torch and torchcodec with the commands you gave me and here is the link of the picture

[Album] imgur.com 
python -m venv venv

.\venv\Scripts\Activate.ps1

pip install -U pip

pip install "torch==2.9.*" "torchcodec==0.8.*"

I also installed ffmpeg<8 after installing miniconda3 with the command you gave and I could see some avcodec-*.dll files in the directory C:\Users\majh0\miniconda3\Library\bin like picture below

conda install -y -c conda-forge "ffmpeg<8"

image
image1112×488 48.4 KB

I made a code with Jupyter notebook like picture below and it still gives me same error…

import os
os.system(r'set PATH=C:\Miniconda3\Library\bin;%PATH%')
# os.environ["PATH"] += os.pathsep + r"C:\GPT_AGENT_2025_BOOK\chap05\ffmpeg-2025-10-16-git\bin"

import torch, torchcodec, platform, subprocess

print("torch", torch.__version__, "torchcodec", torchcodec.__version__, "py", platform.python_version())

subprocess.run(["ffmpeg","-version"], check=True)

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
Cell In[21], line 5
      2 os.system(r'set PATH=C:\Miniconda3\Library\bin;%PATH%')
      3 # os.environ["PATH"] += os.pathsep + r"C:\GPT_AGENT_2025_BOOK\chap05\ffmpeg-2025-10-16-git\bin"
----> 5 import torch, torchcodec, platform, subprocess
      7 print("torch", torch.__version__, "torchcodec", torchcodec.__version__, "py", platform.python_version())
      9 subprocess.run(["ffmpeg","-version"], check=True)

File c:\GPT_AGENT_2025_BOOK\venv\Lib\site-packages\torchcodec\__init__.py:10
      1 # Copyright (c) Meta Platforms, Inc. and affiliates.
      2 # All rights reserved.
      3 #
   (...)      7 # Note: usort wants to put Frame and FrameBatch after decoders and samplers,
      8 # but that results in circular import.
      9 from ._frame import AudioSamples, Frame, FrameBatch  # usort:skip # noqa
---> 10 from . import decoders, samplers  # noqa
     12 try:
     13     # Note that version.py is generated during install.
     14     from .version import __version__  # noqa: F401

File c:\GPT_AGENT_2025_BOOK\venv\Lib\site-packages\torchcodec\decoders\__init__.py:7
      1 # Copyright (c) Meta Platforms, Inc. and affiliates.
      2 # All rights reserved.
      3 #
...
FFmpeg version 7: Could not load this library: C:\GPT_AGENT_2025_BOOK\venv\Lib\site-packages\torchcodec\libtorchcodec_core7.dll
FFmpeg version 6: Could not load this library: C:\GPT_AGENT_2025_BOOK\venv\Lib\site-packages\torchcodec\libtorchcodec_core6.dll
FFmpeg version 5: Could not load this library: C:\GPT_AGENT_2025_BOOK\venv\Lib\site-packages\torchcodec\libtorchcodec_core5.dll
FFmpeg version 4: Could not load this library: C:\GPT_AGENT_2025_BOOK\venv\Lib\site-packages\torchcodec\libtorchcodec_core4.dll
[end of libtorchcodec loading traceback].
[Album] imgur.com

I actually installed ffmpeg which is under version 8 with the command through miniconda…

I don’t know why this thing still gives me error like this..

Could you please help me more if you don’t mind..? ;(

Thank you so much in advance.

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