Shortcuts 🐧

Ubuntu

• Ctrl + Super + D - Hide all windows
• Ctrl + Alt + right/left arrow - Go to next/previous workspace
• Ctrl + Shift + K - kill something
• Ctrl + H - In nautilus, show/hide hidden files.
• Ctrl + Alt + Del - End session
• Ctrl + Alt + T - Launch Terminal
• Super + Q - Close Window (customized)
• Super + Alt + Z - area screenshot to clipboard (customized)
• Super + Alt + X - custom screenshot to file (customized)
• Shift + Print - area screenshot
• Alt + print - window screenshot

Gifs

Redimensionar Gifs:

-convert input.gif -coalesce temp.gif ; convert -size 1200x1200 temp.gif -resize 640x480 resized.gif

Comprimir Gifs

• convert 2011-gif_marcos.gif -fuzz 15.5% -layers Optimize output.gif

  Converter gif para mp4:

• ffmpeg -i animat^C.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)2:trunc(ih/2)2" video.mp4 ou ffmpeg -f gif -i cat.gif cat.mp4

Audio 🔊

Converte midi to mp3

• timidity 0AuraLee.mid -Ow -o - | lame - -b 64 0AuraLee2.mp3
• timidity 0AuraLee.mid -Ow -o - | ffmpeg -i - -acodec libmp3lame -ab 64k 0AuraLee1.mp3

Video 🎥

Split videos:

avconv -i input.avi -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:00 output1.avi (NAOTESTADO)
  ffmpeg -ss 0 -t 100 -i source.m4v -vcodec copy -acodec copy part1.m4v (DEU PAU)
  ffmpeg -i input.avi -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:00 output1.avi (NAO TESTADO)
  ffmpeg -ss 720 -i Filmes\ Caseiros\ 4-2.m4v -t 18 -vcodec copy -acodec copy output.mkv
  avconv -ss seginicio -i source.mpg -t segduracao -vcodec copy -acodec copy part1.mpg
  

Join videos:

avconv -i "concat:part1.mpg|part1.2.mpg" -c copy full.mpg
  

PDFs 📝

Compactar \ Comprimir \ Compress PDFs

1. ps2pdf arquivo.pdf - horrivel e nao compacta muito
2. gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf - fica bem ruim as imagens, mas diminui em até 100x o tamanho
3. gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.6 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf "input.pdf" (not tested)
4. qpdf --linearize input.pdf output.pdf
5. cpdf ebook test.pdf compressed.pdf cpdf Site
6. gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dDownsampleColorImages=true -dColorImageResolution=150 -dNOPAUSE -dBATCH -sOutputFile=output.pdf input.pdf (not tested)
7. ps2pdf -dPDFSETTINGS=/ebook BiggerPdf SmallerPDF (not tested)

   Remove pages from pdf

8. pdftk
9. pdfmod]

   Converte PDFs

10. convert input.pdf output.jpg

All credits to: ME