日本榨汁机哪个最好用:高分求助，请问m2格式文件用什么软件打开？哪里下载？

没有这种格式，倒是有MP2，也是视频文件格式，可用超级解霸打开，以M开头的大部分文件格式都列在这里，自己看看吧：
.MP Multiplan File
Maya Personal Learning Edition File
EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.MP+ MpegPlus Audio File (replaced by .MPC)
.MP1 MPEG Audio Stream, Layer I
.MP2 MPEG Audio Stream, Layer II
.MP2V MPEG Audio Stream, Layer II
.MP3 MPEG Audio Stream, Layer III [IrfanView]
SHARP MZ-series Emulator File
.MP4 iVAST MPEG-4 (hold BIFS-Binary Information For Scene representation) [MPEG-4 Industry Forum]
.MPA MPEG Audio Stream, Layer I, II or III
Palm Memo File
.MPC MS Project Calender
MP3 Collector Collection Manager File
VersaPro Compiled Motion Block
Musepack Audio File (new format replacing .MP+)
.MPD Mini Port Driver
MS Project Database File
.MPDEX MPdex MP3 Database Utility
.MPE MPEG Movie Clip
.MPE.EXE MP3 Digital Player Wrapper
.MPEG MPEG Movie
.MPF MS Design Gallery
MosASCII Project Workspace File
.MPG MPEG Animation [IrfanView]
MPEG 1 System Stream
.MPGA Mpeg-1 Layer3 Audio Stream
.MPH MS Publisher
.MPJ RoboHTML Project
Mountain Video Editing File (Atari)
.MPK Augmented MS-Project File
.MPM WordPerfect MathPlan Macro
Max Payne MOD Archive [Added Info]
.MPNT MacPaint Bitmap File [XnView]
.MPO Augmented MS-Project File
.MPP MS Project File
CAD Drawing File
.MPQ Blizzard Game Data File
(also other games)
.MPR Foxpro Program
Westwood Studios Game File (e.g., Red Alert, et.al. - should be a text file)
FileMaker Spelling Dictionary
.MPS Multimedia File
MPEG-1 Audio and Video File (system stream)
Casio PDL Pocket Streets Map (Microsoft product - see just below)
MS Pocket Streets Map File
Max Payne Saved Game
Garmin Mapsource GPS Mapping Interface
MySweetNix! (change MSN Messenger Service nickname every n seconds)
.MPT MS Project Template File
Multipage TIFF Bitmap
.MPV MS Project View
MPEG-1 Video File
.MPV2 MPEG Audio Stream, Layer II
.MPW MosASCII Project Workspace File
.MPX Foxpro Compiler Menu
MS Project Export File
RCA/Lyra Handheld MP3 Player File (secure MP3 format that only plays in this player)
.MRB MS C++ Multiple Resolution Bitmap Graphic
.MRC MIRC Script File
Bibliographic Data Format
.MRF Marks Russel File [XnView]
.MRI MRI Scan
.MRK Informative Graphics Markup File
.MRO SharpEye Music Reader File
.MRS WordPerfect Macro Resource File
.MRW Minolta Diamage RAW Graphic (use view software supplied with camera)
.MS Checksum File for Anti-Virus
.MS1 OzWin CompuServe E-mail/Forum Access Message File
.MS3D MilkShape 3D Model
.MSA Magic Shadow Archive
.MSC Microsoft Common Console Document
MS C Makefile
.MSF Multiple Sequence File (biomedical analysis)
.MSG Program Message
OzWin CompuServe E-mail/Forum Access Message File
MS Mail Message
.MSH MASH (The Microsoft Agent Scripting Helper)
.MSI Windows Installer File (associates components with features and contains installation control info)
.MSK Autodesk Mask File
PaintShop Pro Mask File [XnView]
.MSM MultiSIM Circuit Diagram
.MSN MS Network Document (possibly nicknames)
Descent Mission File
.MSO MS Word OLE Web Page Storage Stream [Buy Office XP at Shop.Microsoft]
MS FrontPage File [Buy Office XP at Shop.Microsoft]
Math Script Object File
.MSP MS Paint Graphic File [XnView]
Windows Installer Patch
Magix Music Studio File
.MSPX Related to Microsoft's .NET (still researching)
.MSR OzWin CompuServe E-mail/Forum Access SYSOP File
.MSRCINCIDENT MS Remote Assistance Request
.MSS Manuscript Text File (various)
Game Score
.MSSYTLES Windows Visual Style File
.MST Minispecification
DATAIR Pension System Master File
Windows SDK Setup Transform Script (contains mods to apply to package during installation)
ChemFinder Chemical Structure Index
Visual Test Source File
.MSW Word Text File [Buy Office XP at Shop.Microsoft]
.MSWMM Microsoft Windows Movie Maker Project (Part of WinME & XP)
.MSV Sony Memory Stick Format
.MSW MS Word Text File
.MSX Compressed CP/M File Archive
.MTA MS Flight Simulator Maintenance File
.MTB MINITAB Exec File (a macro file)
.MTD Digital Sheet Music [Viewer]
.MTF Darkstone Archive [Dragon UnPACKer]
MicroSurfer File (Link manager/accelerator)
.MTH Derive Math File
.MTK Matrikon Software License File
.MTL MathLook File
.MTM Sound File
MultiTracker Music Module
.MTP L&H Power Translator Pro
.MTV MTV Ray-tracer [XnView]
.MTW Minitab Data File
.MTX Temporary File often used by a browser or TWAIN device
.MU Quattro Menu
.MUC Music Collector Collection Manager File
.MUF ProtoMuck Multi User Forth Program
.MUL Ultima Online Game
.MUP Music Publisher File
.MUS MusicTime Audio File
Finale Music Score
Harmony Assistant, Melody Assistant, Myriad Music plug-in, Melody Player
.MV Miva Script
.MV3 Oozic 3D MusicVideo
.MVA Matrox Video Card Driver
.MVB Database
MS Multimedia Viewer File [Viewer Download]
Note: The viewer download is old. Don't overwrite any new files with old.
.MVC Music Collector Collection Manager File
.MVD MicroDVD DVD Movie
.MVE Interplay Video File [Descent2]
.MVF Movie Stop Frame File
.MVI AutoCAD Movie Command File
.MVW Saber LAN Log File
.MW4 MechWarrior 4 Map
.MWD Photo Soap2 File
.MWF ProMotion Animation
Autodesk MapGuide Author Map Window File
.MWM Mail Warrior File
.MWP Lotus Wordpro 97 Smartmaster File
MegaWorks Pack File [Dutch]
.MWS Maple Spreadsheet
.MWV MovieWorks File
.MX3 Bitbop Tuner Locked Sound File
.MXD GIS Project File (map information)
.MXE Macro Express
Mindex Effect Album
.MXI Proteus File (personal light and sound stimulation system)
Macromedia Extension Information
Mindex Indices file for Indexed Images
.MXM MS Project/Outlook Team Assign Task
Mindex Master Index File for a Category
.MXP Macromedia Extension Manager
ArcReader Published Map
.MXT MS C
ArcMap Map Template
.MYD MySQL Data File
.MYI MySQL Data File
.MYDOCS MyDocs Drop Target
.MYP Make Your Point Presentation
.MYS Myst Saved Game
.MYW MyWorld Education Drawing
.MZ MOZART Music Document
.MZB MegaZeux Board
.MZF SHARP MZ-series Emulator File
.MZP MOZART Percussion File
.MZQ SHARP MZ-series Emulator QuickDisk File
.MZS SHARP MZ-series Emulator File
.MZT MOZART Template File
SHARP MZ-series Emulator File
.MZX MegaZeux World

没听说过这种格式。
很有可能别人在压缩前就改了这个文件的后缀名，其实他的后缀名跟本不是m2，有可能只是rm,avi一类的，楼主可以试一试，跟据文件大小，还有下载时文件使用类型，尝试一下。

http://nj.onlinedown.net/soft/25918.htm试试！！

RM2？？