[FFmpeg-devel] [PATCH] MLP Encoder

Ian Caulfield ian.caulfield
Thu Aug 14 10:16:37 CEST 2008

2008/8/14 Ramiro Polla <ramiro.polla at gmail.com>:
> Hello,
> Attached is the MLP encoder written as part of the Google Summer of
> Code project and mentored by Justin Ruggles.
> Things that are not quite complete:

> - The filters... The filtering code is there and it works, but finding
> good coefficients is not. The FIR code from flacenc.c can be plugged
> in there quite easily, but it takes more bits to encode the
> coefficients than the raw data. It might be because of the small frame
> size (40 samples @ 44100kHz). If the frame size was raised to
> something like 256 samples, the compression would be much better, but
> the RE work shows that the bitstream doesn't allow this. Also my
> attempts with IIR filters weren't successful.

You shouldn't need to supply coefficients very often - once every
major sync ought to be enough...


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