[M4IF Technotes] MP42/MP43 Question

[Robert Saint John]

Bob ~
These are (older) fourcc codes for two of Microsoft's beta codecs for
Windows Media Tools :
MP42: MPEG-4v2 (second version) codec for AVI files
MP43: MPEG-4v3 (third version) for ASF files
Don't confuse a codec (like MP42) with a file format (like AVI). Your
customers will have to get the codecs from Microsoft, from
http://www.microsoft.com/windows/windowsmedia . I don't know if the codecs
(including MP41) are still distributed with Windows Media Player or not. You
may also want to refer them to
http://www.moviecodec.com/codecdownload/msmpeg4.shtml for a detailed
explanation of the "AVI vs ASF" question.
Robert
-- 
Robert W. Saint John - rsaintjohn   ligos.com 
Director of Technical Marketing 
Ligos Corporation - http://www.ligos.com/ 
-----Original Message-----
From: Bob Lang [mailto:RobertLang   honestech.com]
Sent: Wednesday, June 05, 2023 3:23 PM
To: technotes   lists.m4if.org
Subject: [M4IF Technotes] MP42/MP43 Question
Dear Sir or Madam:
Honest Technology has developed an MPEG-1 & -2 Encoder that it markets to
both OEM's and consumers.  Lately several of our customers have tried to
encode files they thought were of an AVI format.  Unfortunately when they
tried, the Encoder reported that the files needed to be decoded with an MP42
or MP43 codec.  Can you tell me what kind of file MP42 and MP43 are and
where I can get the codec to return them to their original AVI format?
Thank you in advance for your assistance.
Bob Lang
Sales Manager
Honest Technology
----------------------------
RobertLang   honestech.com
http://www.honestech.com
5001A West Lincoln Drive
Marlton, NJ 08053
Tel: (856) 596-7575
Fax: (856) 596-0044