Question: is ffmpeg compiled with GPL ?

I have a question regarding the version of `ffmpeg` in the container: I see from the readme that the "Those docker images use code of FFmpeg licensed under the LGPLv2.1". However when I run the executable I see that it is compiled as with ` --enable-gpl` .
Can you please clarify if ffmpeg in the container is licensed LGPL or GPL ?

And thank you for the great work !