Memory leak when encryption key is provided

[vrenaville]

Checklist

• This is a bug report and not a different kind of issue
• I have read the contribution guidelines
• I have checked the list of open and recently closed bug reports
• I have checked the commit log of the master branch

Streamlink version

Latest stable release

Description

Hello,

I have notice, that the memory increase for 1mb per minute if I play a stream using ffmpeg pluging combined with a decryption_key parameter.
It's not ffmeg that cause that, but streamlink drm, because without drm no issue, memory is stable.

Do you have have notice that ?

Vincent

Debug log

I use this container :

https://github.com/vrenaville/streamlink_drm_docker

and the command started is explained in the README