Most audio streams have two channels (ie stereo) but you can cut this back to one (mono) to save additional space.Windows 10 Enterprise. It also lists the number of audio channels.

Please note there is a definite quality loss by decreasing the sampling rate. There is generally no advantage in increasing this value above the source but you will get some size saving by decreasing it. Similarly you can set the sampling rate and any videos are encoded at 44100Hz or 48000Hz. Often above some values you will not notice any improvement and this is also limited by the source audio stream. The higher listed bitrate (kbps) the better the sound quality, within certain limits. This setting controls the quality and size of the output sound. The list above for video codec under Windows also lists the pre-installed audio codes. These control how the audio is saved and affect the size of the output avi and also the quality of the sound. You can select a wide range of possible compression codecs for the audio/sound here. In general many codec have a setting 'bitrate' or 'quality' and generally the higher you select the larger the file size of the outout video and the better the appearance of the video. The individual settings are highly variable and depend on the particular codec. These are accessed by pressing the button 'Video Compression Settings'. For additional codecs please refer to Third Party Codecs.Įach compression codec can have internal setting that can affect size and quality of output.If you have Windows Media Player 9 or 10 on your computer, you have these additional codecs available to you.

If you have Windows XP, see here for a list of codecs that are available for use.

For more information about codecs for Windows Vista,7 & 8, view Microsoft's codec FAQ page.

There are many codecs that come pre-installed in Windows and many more that can be separately installed (DIXV for instance).

These control how the video is saved and heavily affect the size of the output video and also the quality of the output. You can select a wide range of possible compression codecs for the video here. Encoder Options for AVI Files Encoder Options for AVI Files Video Compressor

Download avi codec