[Ffmpeg-devel] Problems with smaf format

Vidar Madsen vidarino
Sat Oct 8 11:44:56 CEST 2005

On 10/8/05, Joerg Schwirz <joerg.schwirz at equido.net> wrote:
> but for a lot of files i see the following message:
> [mmf @ 0x40090d6c]Unsupported SMAF chunk 0552544d
> what it means and how can i fix it.

Unfortunately it means that the SMAF file in question isn't supported.
There are several SMAF versions (2, 3, 5 and 7), of which only 2 (the
oldest/simplest, afaik) is supported. The chunk ID printed is "MTR",
which means version 3 or higher.

Newer versions are more like MIDI / soft-synth files than pure sample
files, so I doubt they will become supported by ffmpeg in the near

There are other conversion tools, though. Yamaha has some sample apps
online, and some googling for "ringtone converter" or similar might


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