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[GH-ISSUE #21096] issue: ffmpeg #34910
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Originally created by @jekv2 on GitHub (Feb 1, 2026).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/21096
Check Existing Issues
Installation Method
Pip Install
Open WebUI Version
v0.7.2
Ollama Version (if applicable)
0.15.2
Operating System
Windows 10 22H2
Browser (if applicable)
Waterfox
Confirmation
README.md.Expected Behavior
Do not know.
Actual Behavior
PS C:\Windows\system32> open-webui serve
Loading WEBUI_SECRET_KEY from file, not provided as an environment variable.
Loading WEBUI_SECRET_KEY from C:\Windows\system32.webui_secret_key
INFO [alembic.runtime.migration] Context impl SQLiteImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
WARNI [open_webui.env]
WARNING: CORS_ALLOW_ORIGIN IS SET TO '*' - NOT RECOMMENDED FOR PRODUCTION DEPLOYMENTS.
C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
WARNI [langchain_community.utils.user_agent] USER_AGENT environment variable not set, consider setting it to identify your requests.
Steps to Reproduce
open-webui serve
Logs & Screenshots
Additional Information
No response
@owui-terminator[bot] commented on GitHub (Feb 1, 2026):
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@Classic298 commented on GitHub (Feb 1, 2026):
This is just a warning. Nothing is broken. If you want it to go away install ffmpeg otherwise just ignore it. Not an issue.
@jekv2 commented on GitHub (Feb 2, 2026):
this solved it, thanks.
powershell as admin
winget install --id=Gyan.FFmpeg -e
I now have this warning:
WARNI [langchain_community.utils.user_agent] USER_AGENT environment variable not set, consider setting it to identify your requests.
@Classic298 commented on GitHub (Feb 2, 2026):
you can ignore that warning too tbh