« Quirky connection blues
Sony Ericsson K700i »
July 15th, 2005

SMAF-to/from-wav converter

The last few days have been spent scratching my head over the “mmf” files that Linda’s phone (a Samsung X640) seems to be so fond of. They’re ring tone files in Yamaha SMAF format, which you apparently have to sell your soul to get the specs to.

Specs or not, with a little bit of reverse engineering, I managed to concoct a small utility to convert to and from (some of) these SMAF files. Take a look at mmftool.

This entry was posted on Friday, July 15th, 2005 at 08:01 and is filed under tech. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “SMAF-to/from-wav converter”

  1. Zoran Says:
    August 20th, 2007 at 14:22

    Vidar,

    sorry if I bother, I found your contribution to FFmpeg - SMAF encode/decode. Could you please help me finding correct FFmpeg command for encoding in .mmf format?

    I succesfully decoded Yamaha original .mmf to .wav through FFmpeg by using command:

    ffmpeg -i input.mmf -ar 8000 output.wav

    but for some reason .mmf encoding commands such as:

    ffmpeg -i input.wav -ab 64 -ac 1 -f mmf output.mmf
    ffmpeg -i input.wav -ab 32 -ac 1 -f mmf output.mmf
    ffmpeg -i input.wav -ar 8000 -ab 32 output.mmf
    etc., etc.,

    create a file which cannot be played in Yamaha MidRadio as original .mmf. Perhaps you know correct encoding command for FFmpeg and input .wav requirments?

    Thanks in advance,

    Zoran

Leave a Reply

sufficient-slavish