ubuntu--ogv格式转mp4格式

屏幕录像软件
sudo apt-get install recordmydesktop gtk-recordmydesktop

然后装ffmpeg
sudo add-apt-repository ppa:mc3man/trusty-media
sudo apt-get update
sudo apt-get upgrade

sudo apt-get install ffmpeg

最后转换
ffmpeg -i demo.ogv -f mp4 demo.mp4

参考连接
1, https://wiki.ubuntu.com/ScreenCasts/RecordMyDesktop
2, http://www.faqforge.com/linux/how-to-install-ffmpeg-on-ubuntu-14-04/
3, http://askubuntu.com/questions/12182/how-can-i-convert-an-ogv-file-to-mp4