I have some videos from a few years ago,with various formats, such as avi, mpg, wmv, rm, rmvb, .... Their sizes are huge(more than 500 MB, and sometimes 1GB).
Given there may likely be some advance in data compression, I would
like to know which file formats and compression methods are
recommended these days, by the standard that without losing obvious
data, while achieving big size reduction.
How can I perform the file format conversion and data compression in
Ubuntu 12.04? Command line and batch ways would be the most convenient,
although GUI ways are also appreciated.
Thanks and regards!