formats video per a web
http://www.w3schools.com/html/html5_video.asp
Crear / Convertir videos
ffmpeg -i movie01_text.dv -acodec libvorbis -ac 2 -ab 160k -ar 44100 -b 700k -s 600×450 output.webm
ffmpeg -i movie01_text.dv -acodec libvorbis -ac 2 -ab 160k -ar 44100 -b 700k -s 600×450 output.ogv
ffmpeg -i movie01_text.dv -acodec libfaac -ab 160k -vcodec libx264 -b 700k -bt 700k […]
