Home News Reviews Forums Shop

mp3 vs. mp4

General discussion about recordable CD, DVD and BD media and write quality testing.

mp3 vs. mp4

Postby coonsanders on Thu Feb 08, 2007 6:16 pm

hi gang

can anybody tell me what is the difference between mp3 and mp4??

CD-RW Player
Posts: 680
Joined: Tue May 02, 2006 6:29 pm
Location: new jersey usa

Postby Spazmogen on Thu Feb 08, 2007 7:56 pm

.mp3 is an audio compression format.
.mp4 is a video compression format.
e6400 Core 2 Duo @ 2.13ghz
GeForce 7600GT 256mb PCI-e
2gb DDR2 667mhz Patriot ram 1.8v in d/c
Gigabyte GA-965P-DS3 F10 BIOS
WD Caviar SE16 250GB SATA300 7200RPM 16MB Buffer
Samsung SATA2 80gb 7200rpm
Samsung SH-S182D 18x DVD burner
User avatar
CD-RW Player
Posts: 1472
Joined: Tue Oct 23, 2001 8:00 pm
Location: Woodstock, Ontario

Postby bicomputational on Fri Feb 09, 2007 10:36 pm

Actually, .mp4 isn't only a video codec. Apple uses .mp4 as the compression
format for their itunes store. By common usage though if an .mp4 file is audio only, its referred to as an .m4a file. So all .m4a files are .mp4 files, but not all .mp4 files are .m4a files - some are video files. As an audio
compression format, most tests I've seen (and my experience too) show that .mp4 files are more accurate than .mp3 files at the same bitrate. Listen to tracks from the itunes store, which are 128 .mp4 files, and compare them to .mp3 files made with any encoder at 128 and I think you will hear the difference. Once you get above about 192 I don't hear much difference. See this Wiki link http://en.wikipedia.org/wiki/MPEG-4_Part_14. (Sorry, that link doesn't take you to exactly where you need to go - just search .mp4 on wiki)
CD-RW Thug
Posts: 50
Joined: Mon Apr 17, 2006 6:39 pm
Location: Pennsylvania

Return to Recordable Media Discussion

Who is online

Users browsing this forum: No registered users and 0 guests

All Content is Copyright (c) 2001-2016 CDRLabs Inc.