manipulating multimedia format

ffmpeg is a powerful tool to convert multimedia formats. Working with ffmepg generally walks along the routine below:

1. checking information of the original file (bit rate, frame size, etc.):

   $ ffmpeg -i input.ogv

2. converting to expected format:

   $ ffmpeg -i input.ogv output.flv

There are two ffmpeg options impacting the size of output: -b and -ab. The former is bit rate (bit/s), and the latter is audio bit rate (bit/s). `-b 128k' is correct syntax. Other interesting options are:

• -threads    specifying how much ffmpeg threads
• -loglevel    specifying information dumped (fatal is a good choice.)
• -target    automatically setting related options with respect to this option (dvd, ntsc-dvd, pal-dvd, etc.)
• -bufsize    setting video buffer verifier buffer size (in bits)
• -r    setting frame rate (Hz value, fraction or abbreviation), (default = 25)
• -s    setting frame size-aspect setting aspect ratio
• -sameq    using same video quality as source (implies VBR---variable bit rate).

The user manual lists all about ffmpeg usage:
http://www.ffmpeg.org/ffmpeg.html
Here is showing how to join multimedia files:
http://www.ffmpeg.org/faq.html#SEC27
One can download a static-compiled program here:
http://ffmpeg.gusari.org/static/

Use ogmrip to rip light media content.