gcpg9w
Last Updated: February 25, 2016
·
2.466K
· flurin

Convert video to web compatible formats from the commandline

Tools

I'm using ffmpeg to convert the video's. To create the animated gif you'll need gifsicle or convert (from ImageMagick).

mp4 (H.264 / ACC)

ffmpeg -y -i src.mov -vcodec libx264 -pix_fmt yuv420p -vprofile high -preset fast -b:v 500k -maxrate 500k -bufsize 1000k -vf 'scale=trunc(oh*a/2)*2:480' -threads 0 -acodec libvo_aacenc -b:a 128k src.mp4

webm (VP8 / Vorbis)

ffmpeg -y -i src.mov -vcodec libvpx -quality good -cpu-used 5 -b:v 500k -maxrate 500k -bufsize 1000k -vf 'scale=trunc(oh*a/2)*2:480' -threads 0 -acodec libvorbis -f webm src.webm

jpeg

Create a screenshot at 0 seconds (the -ss parameter)

ffmpeg -y -i src.mov -ss 0 -vframes 1 -r 1 -vf 'scale=trunc(oh*a/2)*2:480' -f image2 src.jpg

Animated gif

mkdir /tmp/gif/
ffmpeg -i src.mov -r 10 -vf 'scale=trunc(oh*a/2)*2:200' /tmp/gif/out%04d.gif 
gifsicle --delay=10 --loop -O3 --color-method median-cut /tmp/gif/*.gif > src.gif

Animated gif (alternative / better quality)

ffmpeg -i src.mov -r 10 -vf 'scale=trunc(oh*a/2)*2:200' /tmp/gif/out%04d.png 
convert -delay 1x10 /tmp/gif/*.png \
      -fuzz 2% \
      +dither \
      -coalesce -layers OptimizeTransparency \
      +map animation.gif

Original conversion for the animated gif: http://blog.room208.org/post/48793543478
Original blogpost for the mp4/webm/jpeg: http://blogs.visigo.com/chriscoulson/encode-h-264-and-webm-videos-for-mediaelement-js-using-ffmpeg/