Remuxing m4a radio files for digital audio player

[Vangelis forthnet]

On Thu Feb 20 13:40:12 GMT 2014, batguano999 wrote:

>It seems that the Windows version of MP4Box
>does need both INPUT and OUTPUT.

Actually batguano99, I am not seeing this on WinVista SP2 x86;
As per the documentation @

http://gpac.wp.mines-telecom.fr/mp4box/mp4box-documentation/

"As of version 0.2.4, MP4Box performs in-place rewrite of IsoMedia files 
(the input file is overwritten). You can change this behaviour by using 
the -out Filename option. For older versions, when MP4Box is used to modify 
an existing IsoMedia file, the original file (for example AFILE.mp4) is NOT 
overwritten, the resulting file is stored in out_AFILE.mp4. To specify 
another name for the resulting file, use the -out Filename option.
("As of version 0.2.4, MP4Box always stores the file with 0.5 second 
interleaving and meta-data at the begining, making it suitable for HTTP 
streaming"; I think this is what cures the OP's
issue...)

Also, when printing:

mp4box -h all

same thing is reported:

"-out filename        specifies output file name
                       * Note: By default input (MP4,3GP) file is 
overwritten"

Using a 32bit Windows build of MP4Box
( GPAC version: 0.5.1-DEV-rev4214), I
input a GiP recorded audio file and ran:

mp4box -ipod gip.m4a

Input file was processed and output file overwrote it,
command prompt window excerpt follows:

F:\Applications\MP4Box-0.5.1-dev-r4214-x86-shared.GPAC>mp4box -ipod gip.m4a
Setting up iTunes/iPod file...
Saving gip.m4a: 0.500 secs Interleaving

F:\Applications\MP4Box-0.5.1-dev-r4214-x86-shared.GPAC>

Regards,
Vangelis.