Multimedia dedicated weblog.

MONOGRAM AMR Encoder v1.0.0.0

January 24th, 2008 Posted in Free Software

Hello people. As the post title says my today’s filter is a free implementation of AMR DirectShow filter. It is based on the source code provided by 3GPP.org site - the same as libamr_nb and comes as GNU GPL.

Features:

  • Internal resampler and channel mixer (that generate 8Khz, mono)
  • Accepts any input sound format
  • Property page with information
  • Mode selection on-the-fly

AMR Encoder

Download binary : mmamre_1.0.0.0_bin.zip (200 KB)

Download source : mmamre_1.0.0.0_src.zip (1 MB)

Enjoy,

Igor

  1. 4 Responses to “MONOGRAM AMR Encoder v1.0.0.0”

  2. By pvdeejay on Feb 28, 2008

    Hello,
    Sorry for such a dumb question but… Can you please explain briefly how do I use such encoder? I see it is possible to use graphedit to construct graph and use the encoder filter as a part of it… I am just searching for more convenient way. Or is your graph studio the right answer to this question?

  3. By Igor Janos on Mar 1, 2008

    This encoder is a plugin for the DirectShow architecture. That means it can process uncompressed audio and output AAC-encoded frames. If you want to use it for converting your files to AAC you’re gonna need another plugin (DirectShow filter) to write the frames either in MP4 file or some other format. If you’re okay just with ADTS files you can select ADTS as output format and use the Dump filter to dump ADTS frames directly into file. It should be playable then.

  4. By pvdeejay on Mar 3, 2008

    Hello,
    I am getting confused.
    This is the only amr encoder I am aware of.
    Can you be more specific please?
    Let’s take some wav file as an example input. I guess this filter can encode it into amr.
    Since all my directshow compliant players including windows media player, winamp, vlc media player can play wav files I am sure I have got right source filters already installed.
    Which application has user friendly interface to make the best of these filters?

  5. By Igor Janos on Mar 4, 2008

    Oh :) I’m sorry. I got confused. Now I can see that I was talking about the AAC encoder and not the AMR.

    Hmm. Right now I’m not aware of any AMR file writer or mux filter :(. I’ll make one when I find some time.

    As for the application.. I prefer GraphStudio for playing with filters.

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