To facilitate the ability of making on-the-fly changes to "Key",
"Tempo" and "Multiplex Removal" during Video playback, CompuHost
utilizes advanced technologies not found in simpler Video Players
such as Windows Media Player, which offer no support for such
One such technology is
commonly known as "DirectShow". DirectShow enables manipulation of
Audio (Key Changes, Multiplex Removal etc.) and Video (Tempo changes
etc.) through the use of in-stream components know as "Splitters"
Starting with Windows XP,
typical Windows installations come preloaded with the necessary
DirectShow "splitters" and "filters" to facilitate playback of
native Windows Video formats such as "AVI", "MPEG" and "WMV".
However some formats, most notably the "MP4" format, may require
additional or updated splitters and filters to facilitate reliable
Finally, although the
correct splitters and filters may have been installed initially,
they may become "corrupted" or "uninstalled" by installing third
party applications (NERO products are the WORST!). If you suspect
this to be the case, we recommend that you reinstall the applicable
"codecs" and "splitters" as needed.
MP4 Capable DirectShow
Unfortunately, to further complicate matters,
numerous "MP4 Capable DirectShow Splitters" are available, each with
their own set of issues and potential incompatibilities, depending
on the actual video file in question.
Below you'll find links to TWO of the most reliable
splitters. Although our testing has proven both to be reliable with
the vast majority of video files, we do not endorse or guarantee
visit one of the following links and install the
splitter in accordance with the instructions provided by the
recommend trying the "AV-Splitter" first, if you continue to
encounter issues try the alternate "Haali Media Splitter".)
As mentioned above, numerous "codecs" (Compressor-Decompressor)
are available, each supporting and applicable to a specific format.
To clarify, in order to playback a "MP4 H.264" encoded video file
you MUST have a compatible "MP4 H.264" codec installed on your
computer, if not, you'll encounter an error when attempting to
playback the video file.
To simplify the acquisition and installation of the most common
codecs we recommend installing the following "Codec Pack".
Windows Media (WMA/WMV)
Windows comes preloaded with the necessary codecs to facilitate
playback of Windows Media Files (WMV/WMA). However these codecs may
become corrupted by the installation of third party applications.
Therefore, if encountering issues with playback of any of these
formats we recommend reinstalling the applicable codecs.
You may obtain the latest Windows Media Codecs by visiting the