mp3read and mp3write

Improved reading and writing of mp3 files

Description

These versions of mp3read and mp3write are direct drop-in replacements for wavread and wavwrite to access MPEG audio mp3 files. Features include:
 - aims to duplicate complete syntax of wavread and wavwrite
 - also supports on-the-fly downsampling and channel merging of mpg123
 - optimized for very long mp3 files - only decodes the needed portion
 - uses popen for encoding to avoid a large temporary file (when available - see my popenw mex)
 - attempts to preserve time alignment of files through read/write loop by removing "warm up" samples
 - package includes helper binaries for Linux, Windows, Mac-PPC, Mac-Intel, and Mac-Intel-64bit

Acknowledgements

Mp3 Write And Mp3 Read inspired this file.

This file inspired M4awrite Write M4a Format Audio File, Mi Rtoolbox, Mp3 Player (Gui), and Audioread Unified Audio File Input Function.

• MATLAB release: MATLAB 7.10 (R2010a)
• Other requirements: Relies on external binaries mpg123, mp3info, and lame. Package includes binaries that should work, but YMMV. Documentation includes links to the sources of these programs.

[reza]

its good

[Manuel]

 

[vyshakh]

good

[KVGCE]

 

[KVGCE]

Really useful... i've used it in my project... Thanks to u and of course to "Luigi Rosa" < http://labrosa.ee.columbia.edu/matlab/mp3read.html >

[nick]

Thank you, I very much need this

[Oliver]

Regarding the error with mysystem(cmd):
The cmd variable defines how the mp3info/mpg123 is called on your machine. I got the mp3read working by changing the corresponding lines (somewhere around line 180 and 312 in the code) to:

cmd = ['mp3info -r m -p "%Q %u %b %r %v * %C %e %E %L %O %o %p" "', FILE,'"'];
and
cmd=['mpg123', downsampstr, chansstr, skipstr, lenstr,' -q -w "', tmpfile,'" "',FILE,'"'];

This should work if you installed the mp3info/mpg123 normally and I expect the mp3write can be fixed in a similar manner.

(Sidenote: Sorry for the low ratings, apparently I'm really bad at clicking textboxes on a trackpad.)

[Oliver]

 

[Shreyes]

 

[Ajay]

I am getting a similar to the error described above I m using 64 bit Ubuntu and trying to execute mp3read but it gives me this error :-

mp3read('test.mp3')
??? Error using ==> mp3read>mysystem at 373
unable to execute "/home/ajayram/Documents/MusicWork/Codes/mp3info.glnxa64" -r
m -p "%Q %u %b %r %v * %C %e %E %L %O %o %p" "test.mp3"
(/bin/bash: /home/ajayram/Documents/MusicWork/Codes/mp3info.glnxa64: No such
file or directory
)

Error in ==> mp3read at 188
w = mysystem(cmd);

--------------------------------

I have no clue as to how to get around this issue.

[Mamoon]

I'm using this on a 65-bit Ubuntu (10.04.4 LTS) and I keep on getting the following error when I run the demo file:
??? Error using ==> mp3write>mysystem at 168
unable to execute
"/MATLAB/mp3readwrite/lame.glnxa64"
--quiet -h "/tmp/tmp632.wav" "piano.mp3"
(/bin/bash:
/MATLAB/mp3readwrite/lame.glnxa64:
No such file or directory
)

Error in ==> mp3write at 156
mysystem(cmd);

Error in ==> demo_mp3readwrite at 45
mp3write(d,sr,'piano.mp3');

I'm certain that this is because I'm missing the lame.glnxa64 file for 64 bit version.

PLEASE HELP ME!! It is much appreciated.

[sunil chhipa]

great work............

[sunil chhipa]

 

[bei liu]

It's good,bur I dont know hwo to use it.

[Han]

Thank you

[Jesse van Muijden]

works fine with Matlab 7.10.0 (R2010a) on Windows XP Pro SP3. Thank you!

[Mr Smart]

 

[Ilaria Milesi]

 

[Manikandan]

I got 'Out of Memory' error. Please advice me. Thanks.

[David]

and I got this error with mp3read

>> mp3read([mp3_list(i).name])
??? Error using ==> mp3read>mysystem at 373
unable to execute "C:\Documents and Settings\mfiles\mp3readwrite\mpg123.exe" -q -w "\tmp\tmp127.wav"
"DJ.mp3" ()

Error in ==> mp3read at 330
mysystem(cmd);

[brigitte audrey]

very good stuff. thanks for sharing

[Gökhan Vural]

It works very nice overally. However, it gives ".mp3 is corrupt or is not a standard MP3 file." error for some songs. Indeed, files're not corrupt.
Does anybody know the reason of it ?

[T myself]

Great tool! Works nice. Thank you.

[Jorge Moragues]

As Mahocan said, the corresponding 'SIZ' command does not work properly and it returns a wrong number of samples of the file.

Has anybody solved this problem?

Thanks

[JG NT]

I can recommend this program! IT worked very good. Thanks

[loch zeng]

This is a good tools

[Aaron Clarke]

I tried it and it worked great right away. Nice program!

[suraj prakash]

its cool.

[Jose Uy]

It doesn't seem to work with mp3's downloaded from itunes. Does the AAC encoding have anything to do with this?

[hrushikesh kulkarni]

great i am very thankful to you

[Mahocan Ganemur]

Good job!

[Mahocan Ganemur]

Hi,

Thanks for building such a useful tool. I just tried the command "SIZ = MP3READ(FILE,'size')" on MATLAB. The resulting "total number of audio samples" value given by the command is not correct. For example in the file that I test, there are 237 931 198 total audio samples, while the command has given the result as 193 625 280. I tried on another mp3 file that is relatiely small. The correct size of this file is 41 133 311, while the command has given as 40 912 128. I cannot get the correct value of the total number of audio samples in the mp3 file with this command. Any suggestions on this issue? Thanks in advance.

[Daryush Mehta]

Forgot to mention that in my setup (WinXP SP2, Matlab 2006b), the default bit rate for mp3write turns out to be 64 kbps, not 128 kbps that's mentioned in the help file.

[Daryush Mehta]

Works great! Commenting in the code helps the reader well. I am running Windows XP SP2 and Matlab 7.3.0 (R2006b).

As Dan Ellis notes on his website <http://labrosa.ee.columbia.edu/matlab/popenrw.html>, two functions are available to prevent Lame from having to access a large temporary file; instead, a "pipeline" is open to the lame codec. I was able to compile Dan Ellis' popenw.c and popenr.c files ('mex popenw.c' and 'mex popenr.c' at Matlab command prompt) to give platform-specific mex files. But, when I ran the mp3write code, no error was given and no mp3 file was created. If anyone can get this functionality working, please share it!

Also, definitely read the mp3write help file to note that you can specify the bit rate by changing the last integer in
mp3write(x,fs,'filename','--quiet -h -b 128');'

Should prove to be very useful. Thanks for writing them.