On Mon, Feb 28, 2005 at 08:21:19PM +0000, Dave Chapman wrote: > Hopefully this is within the scope of this list but following a lot of > recent googling, there doesn't appear to be any interest in > "open-sourcing" anything related to DVD-Audio. > > As you may know, commercially authored DVD-Audio disks have three very > unfriendly features - encryption, watermarking and Meridian Lossless > Packing (MLP). I am assuming that these are some of the reasons > developers have not become interested in DVD-Audio.
Probably very true. It also seems quite difficult to obtain solid technical info about it. > However, none of those features are compulsory, and if you remove those > obstacles (which I am not interested in overcoming - simply avoiding), > you are left with a standard which allows 18 combinations of samplerate > and sample wordsize for 2-channel stereo audio (including 16-bit/44.1KHz > RedBook, and going all the way up to 24-bit/192KHz), plus a range of > 6-channel uncompressed surround sound formats. > > My aim is to produce a set of GPL'd tools to both author, "un-author", > and play such unencrypted, uncompressed disks, and am curious to know if > any other developers have an interest in this area or not. I would certainly be very interested as a user. As a developer I have no experience at all with things such as cdrecord or cdrdao, so apart from some knowledge on how people would want to use DVD-A for things like Ambisonics, I'd probably have little to contribute. BTW, a script based interface such for cdrdao would be fine for me, don't waste your time with a GUI (others will do that anyway :-). > I should reiterate that I'm not interested in investigating features > such as encryption or MLP - I simply wish to be able to author my own > unencrypted and uncompressed DVD-Audio disks using my own music, which I > can then play back either on my hardware DVD-Audio player or on my PC, > all using free software The only limitation of not using MLP would be that you can't have six channels at 24/96. BTW, do you know the exact status of MLP ? Is patented and do we know how it works, or is it a 'trade secret' ? -- FA
