FFmpeg license
Remotion distributes a compiled FFmpeg binary under the GPLv2+ license. The source and build scripts are publicly available.
x264 and x265
x264 and x265 are licensed under the GPL, not the LGPL. Therefore, Remotion's FFmpeg binary cannot be distributed under the LGPL.
fdk-aac
Remotion does not use the official fdk-aac distribution. The build script shows that Remotion's FFmpeg binary uses the free fdk-aac-free variant, which has no licensing concerns.
Other components
No other components in Remotion's FFmpeg binary should raise licensing concerns.
Remotion has carefully verified the licensing information on this page. Concerns can be sent to [email protected].