FILExt - The File Extension Source

Details for file extension .MAI are on this page. Because there is no central registry for file extensions and their associated programs there may be multiple entries on this page. And, because there are many (some say over a million) such associations not all may be listed here.

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Windows can't open .MAI files?
If Windows is unable to open files with the extension .MAI you may not have the appropriate program installed or, you may have registry errors. To help, we strongly recommend you run this free registry scan.

A search on the file extension you submitted shows 4 record(s). The details for each of these are shown below. The best FILExt can do for you is provide the details we know about. Selecting the information that applies to your particular situation is up to you. Use any hints provided. If the information here is not helpful, FILExt is sorry; but as a research site FILExt cannot provide personal support. If you need further information you might try the research tips on the FILExt Help Me page.

Extension: MAI
Program and/or Extension Function [What's This?]		Company [What's This?]
MS Mail Message
Specific Notes [What's This?]
(None) Recommended: Find MAI errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
Note: This entry has not yet been verified by FILExt. It was submitted to the list and appeared to be accurate; however, no verification links have so far been found on the Internet. Please use this association data with that in mind.
This is record 7037 last modified on 2003-01-14 and created on 2003-01-14.

Extension: MAI
Program and/or Extension Function [What's This?]		Company [What's This?]
Pegasus Mail Message Directory		David Harris
Specific Notes [What's This?]
This is a directory extension, not a file extension. Recommended: Find MAI errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 15867 last modified on 2004-01-23 and created on 2004-01-23.

Extension: MAI
Program and/or Extension Function [What's This?]		Company [What's This?]
Sony Video Thumbnail		Sony Corporation of America
Specific Notes [What's This?]
Found on memory sticks along with .MQV movie files. A user submitted these comments: A video thumbnail file used by the MoviePlayer program on Sony's Clie line of Palm OS PDAs. .MAI files contain a JPEG thumbnail picture along with information on the video file, such as its Title, Duration (in seconds), Date and time, Bit rate (audio and video in kbps), Dimensions (in pixels), File name and Size (in kB). The standard dimensions of the encoded JPEG picture are 80x60 pixels. The .MAI files need to be placed in the \PALM\PROGRAMS\MoviePlayer\100MQV01 folder while the video files in the \MQ_ROOT\100MQV01 folder in order for MoviePlayer to correctly show the video and its information in the movie playlist. The thumbnail in the .MAI file can be viewed with any picture viewer (e.g., IrfanView). To view/edit the video information you have to use MoviePlayer (and press on the little filmstrip icon on the left of the video). To create an .MAI file (or update the thumbnail picture in it) you have three options: 1. Use Sony's Image Converter (IC 1.0, 1.5, 2.0, 2.1) Windows program to convert videos and the matching .MAI files. In order for this to work, you need to have the folder \PALM\PROGRAMS\MoviePlayer\100MQV01 already existing on the selected media (hard drive, Memory Stick, etc.). 2. Use MoviePlayer on the PDA to create the thumbnail: while the video is playing, the player's menu contains under Thumbnail an Update command that updates the thumbnail picture. To invoke the menu, you have to play the movie and in small view use the Menu button on the silkskin or sidebar; or in full screen view press Ctrl+M to call the menu if your PDA has a keyboard. You can also update by using the Command strike and then U, as the shortcut to the Update command is /U. 3. Create the JPEG thumbnail from the original video file using ffmpeg and use lmame's website to create the .MAI file from the JPEG file. For this, use the following command line for ffmpeg: "ffmpeg.exe -y -i your_video_file -f image2 -ss number_of_the_frame -vframes 1 -s 80x60 -an name_of_jpeg_file", so for example to extract the 3rd frame from "test.avi" and create "test.jpg" use "ffmpeg.exe -y -i test.avi -f image2 -ss 3 -vframes 1 -s 80x60 -an test.jpg". And then use the following website to create the .MAI files: [see associated links]. Recommended: Find MAI errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		Creation of a .MAI File From a .JPEG File
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 14281 last modified on 2007-01-09 and created on 2003-05-06.

Extension: MAI
Program and/or Extension Function [What's This?]		Company [What's This?]
VAX Mail
Specific Notes [What's This?]
(None) Recommended: Find MAI errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 7038 last modified on 2003-01-14 and created on 2003-01-14.

General Info

• If the extension you are looking for is of the form .??_ the file is likely a compressed file and part of an install routine. When the install program runs it will expand the file and replace the underscore with the proper letter for the file type.
• If the file is sent as an audio file with any three-character extension it may be a dictation file where the extension is the dictator's initials; playable by BCB Voice Systems software (see ??? extension). The file could likewise be a dictation file in TrueSpeech format. Use Windows Sound Recorder and/or Media Player to play these back.
• If the extension you are looking for has a number at the end or is only a number and there were no results consider entering the same extension format using zero or one as some programs produce numbered split files but when the split can be extensive (e.g., .000-.999) only the first entry is in the database.

Need more information about any entries on this page? Try a Google search using terms in the above information along with words like "format," "convert," "conversion," and even "hacking." A search box is provided here for your convenience.

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