[Feature Request] Pass individual parameters to FFMPEG in a field

[propagare]

An empty field to perhaps pass individual parameters for FFMPEG. Like those here to rotate a video!

"Set the environment variable FFMPEG_ARGS to FFmpeg flags such as -vf transpose=1 (90° clockwise), -vf transpose=2 (180°), -vf transpose=3 (90° counterclockwise), or -vf hflip,vflip.."