FFmpeg
Used by 9 peopleffmpeg.org ↗
“That is done completely by using FFmpeg with permutations of filters which allow trimming, cropping, watermarking, converting, etc in one go.”
Jane Manchun Wong Interview, Engineer, security researcher · via Uses This 
“FFmpeg for stripping audio from video, or adding it, or creating gifs out of image sequences.”
Jordan B. L. Smith Interview, Researcher, music information retrieval · via Uses This 
“I use FFmpeg to convert my BMP files into a AVI movie.”
Terry Davis Interview, Developer (TempleOS) · via Uses This
