Notes about the MP4V file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The MP4V file type is primarily associated with 'MPEG-4'. You often see BIFS associated with MPEG-4. BIFS stands for "Binary Format for Scenes". BIFS provides a complete framework for the presentation engine of MPEG-4 terminals. Play MP4 files with various players; just download the correct CODEC from the player's Website. For a summary of how to view an MPEG-4 movie on a Sony PSP, see the FAQ.
Detailed information for file extension MP4V:
Primary association: MPEG-4Identifying characters
Hex: 00 00 00 , ASCII:
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database
Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
To view technical data on file-extension MP4V click this link
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System Info for File Extension .MP4V
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly
from user systems.
EXEFile: %ProgramFiles%\Media Player Classic\mplayerc.exe
EXEFile: %ProgramFiles%\Windows Media Player\wmplayer.exe /prefetch:6 /Open
EXEFile: %ProgramFiles%\K-Lite Codec Pack\Media Player Classic\mplayerc.exe