Просмотр кода страницы Convert .ogv file to .mp4, .webm, .avi in Linux using ffmpeg

'''Convert .ogv file'''

To install the ffmepg package, open your terminal and enter the following command.
You will be prompted for your password. sudo apt-get install ffmpeg
Once the package has been installed CD to the directory of where your .ogv
file is located, and enter the following command below.

Replace {filename} with the filename you wish to convert,
and replace new_filename with the new name for the mp4 file:
 ffmpeg -i {filename}.ogv {new_filename}.mp4
If you wanted to convert your .ogv file to .webm format you would use the following command 
 ffmpeg -i {filename}.ogv {new_filename}.webm
If you wanted to convert your .ogv file to .avi format you would use the following command 
 ffmpeg -i {filename}.ogv {new_filename}.avi
We have only just skimmed the surface of what is achievable using ffmepg.
For further information click on the related link below.
AVI to MKV using FFmpeg:
 ffmpeg -i <filename>.avi -vcodec ffv1 -acodec pcm_s16le <filename>.mkv
 mencoder file.avi -ovc -oac -o output.mkv
и еще один вариант тут:
[http://www.cyberciti.biz/faq/linux-unix-bsd-appleosx-convert-ogv-to-avi-video-audio/ несколько вариантов...]

* Максимальное сжатие video:
 ffmpeg -i input.mp4 -vcodec h264 -acodec aac output.mp4