Hello,
I belive that I can help you build a ffmpeg command, or integrate ffmpeg on your current platform.
I have been working with ffmpeg for the past years and completed multiple projects with it, including, but not limited to:
-Live streaming (HLS/DASH)
-VOD
-Complex video and audio filters (crop, cut, trim ...)
-Multiple audio tracks, multiple subtitles
I am looking forward to hearing from you,
Antoine Camusat