Dark Art of Video Codecs Part 2

Stolen Outright from:
http://johndyer.name/ffmpeg-settings-for-html5-codecs-h264mp4-theoraogg-vp8webm/

This is just a quick tip for people encoding video for HTML5 (and using sweet HTML5 players like MediaElement.js). Go download a copy of ffmpeg, and if you’re on Windows, use this guide to set it up. Then use the following commands to create H.264, WebM, and Ogg videos, along with an image you can use as a poster.

REM mp4  (H.264 / ACC)
"c:\program files\ffmpeg\bin\ffmpeg.exe" -i %1 -b 1500k -vcodec libx264 -vpre slow -vpre baseline                                           -g 30 -s 640x360 %1.mp4
REM webm (VP8 / Vorbis)
"c:\program files\ffmpeg\bin\ffmpeg.exe" -i %1 -b 1500k -vcodec libvpx                              -acodec libvorbis -ab 160000 -f webm    -g 30 -s 640x360 %1.webm
REM ogv  (Theora / Vorbis)
"c:\program files\ffmpeg\bin\ffmpeg.exe" -i %1 -b 1500k -vcodec libtheora                           -acodec libvorbis -ab 160000            -g 30 -s 640x360 %1.ogv
REM jpeg (screenshot at 10 seconds)
"c:\program files\ffmpeg\bin\ffmpeg.exe" -i %1 -ss 00:10 -vframes 1 -r 1 -s 640x360 -f image2 %1.jpg