Hi there,
I'm Fabrice Nicol, the developer of the free software dvda-author, which
creates DVD-Audio discs (http://dvd-audio.sourceforge.net/)
1. With the help of Jai Luthra, the MLP encoder maintainer, I've been
implementing DVD-Audio authoring for MLP files using libavcodec. This
will be an important step forward, as MLP makes it possible to implement
full 5.1 High res audio on DVDs, a long-awaited feature in the free
world (plus there is no longer any maintained commercial software that
offers it either, the only two ones that did it have be retrieved from
the market).
I was wondering whether the ffmpeg team has investigated the potential
legal issues with the MLP decoder/encoder, as it was originally created
under proprietary licensing terms. In particular, I'm wary that
uploading to Sourceforge servers hosted in the US may involve potential
risks in this respect. Do you think it necessary to refrain from posting
on SF and sticking to European-hosted servers, or is this just unecessary?
2. MLP on DVD-Audio is just MLP files with MPEG-like headers (64 or 43
bytes long). I've been able to infer and implement 90 % of these headers
but there are 4 remaining bytes at the end of headers with which I'm
stuck. They strongly differ from the reference for LPCM DVD-Audio. LPCM
values are sample rate/size/downmix. MLP values cannot be that. I was
wondering if the ffmpeg specialists who worked on MLP or possibly MPEG
could have an idea. Issue is referenced in lines 577-582 of this blob :
https://sourceforge.net/p/dvd-audio/dev/ci/master/tree/src/ats.c
Best,
Fabrice Nicol
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