File Extension 261

.261 File

File extension: 261
File type: H.261 Encoded Video File


Notes about the 261 file extension:



To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The 261 file type is primarily associated with 'H.261 Encoded Video File'. This extension is more usually .P64.

Detailed information for file extension 261:


Primary association: H.261 Encoded Video File
Related links: Player

Other applications associated with file type 261:




To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

Technical data

To view technical data on file-extension 261 click this link to expand/hide the additional area.

System Info for File Extension .261

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.

ProgramID: proeFile9
EXEFile: %ProgramFiles%\ptc\proeWildfire 3.0\bin\proe.exe

ProgramID: proeFile9
EXEFile: %ProgramFiles%\ptc\proe\bin\proe.exe


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