Office(pdf,jpeg,audio,video)

• Concat PDFs: gs -o merged.pdf -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress *.pdf
• JPEG to PDF: gm convert *.jpg file.pdf
• Reduce PDF size: gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dDownsampleColorImages=true -dColorImageResolution=60 -dNOPAUSE -dBATCH -sOutputFile=output.pdf file.pdf
• Cut audio/video files:
  • https://www.epifocal.net/blog/video-stabilization-with-ffmpeg
  • sudo aptitude install mpgtx
  • mptsplit input.mp3 [00:00:20-00:00:58] -o output.mp3
  • ls | grep mp3 | xargs -I{} -n1 echo "mpgsplit {} [0:35-] -o x{}"
• Convert DOCX to PDF:
  • libreoffice --headless --convert-to pdf *.docx