Is it possible to keep HD audio for BD5/9 ?

[OEM]

I'm trying to copy a bunch of audio (music) Blu-rays to DVD media. Many of these discs are rather small (15 to 5 GB) and they often include three versions (LPCM/DTS-MA/Dolby TrueHD) of the same audio. By removing the versions I don't need and compressing the video stream, many of these discs should easily fit on DVD5 media (The video is just useless still pictures that I don't care about).

However BD-Rebuilder insists on recoding the audio to AC3 (sometimes resulting in a BDMV folder that's less than 2GB in size), and I can't figure out how to stop this. Is there a hidden setting or anything ?


*Edit* Changed the title from DVD5/9 to BD5/9.

[manolito]

From Wikipedia:

The official allowed formats for the audio tracks on a DVD Video are:

PCM: 48 kHz or 96 kHz sampling rate, 16 bit or 24 bit Linear PCM, 2 to 6 channels, up to 6,144 kbit/s; N. B. 16-bit 48 kHz 8 channel PCM is allowed by the DVD-Video specification but is not well-supported by authoring applications or players;
AC-3: 48 kHz sampling rate, 1 to 5.1 (6) channels, up to 448 kbit/s;
DTS: 48 kHz or 96 kHz sampling rate; channel layouts = 2.0, 2.1, 5.0, 5.1, 6.1; bitrates for 2.0 and 2.1 = 377.25 and 503.25 kbit/s, bitrates for 5.x and 6.1 = 754.5 and 1509.75 kbit/s;[12]
MP2: 48 kHz sampling rate, 1 to 7.1 channels, up to 912 kbit/s.

For DTS-MA you could use eac3to to extract the DTS-Core from the DTS-MA track. The DTS-Core track should be DVD compliant.

LPCM should also work on a DVD, but only if the authoring application can handle it.

Dolby True-HD is certainly not DVD compliant and needs to be reencoded.


Cheers
manolito

[Groucho2004]

For DTS-MA you could use eac3to to extract the DTS-Core from the DTS-MA track. The DTS-Core track should be DVD compliant.

LPCM should also work on a DVD, but only if the authoring application can handle it.

Dolby True-HD is certainly not DVD compliant and needs to be reencoded.
The target format he wants is not clear ("DVD Media" is rather ambiguous). Since he mentioned BD Rebuilder, it might be AVCHD on DVD9/5.

[OEM]

Sorry, I meant Blu-ray video/file structure burned to DVD media (to be played on Blu-ray players). I believe the correct term is BD5 and BD9. It is strictly speaking not AVCHD, as the AVCHD standard doesn't support things like Java menu and HD audio.

Yes I'm aware of the limitations of such a disc. I know that many Blu-ray players will not play BD5/BD9 discs.

[Groucho2004]

You might get a faster answer by posting in the BD Rebuilder bug thread.

[Ch3vr0n]

No it's not, not only would it violate the maximum bitrate transfer a DVD allows it simply isn't possible. An HD track alone can easily be 8-10GB, which is by itself already bigger than even a double layer DVD can hold.

[OEM]

No it's not, not only would it violate the maximum bitrate transfer a DVD allows it simply isn't possible. An HD track alone can easily be 8-10GB, which is by itself already bigger than even a double layer DVD can hold.Nonsense. Most DVD-Audio capable players can read 24/96 5.1 PCM just fine from a standard DVD disc, and that is twice the bitrate of DTS-MA. Filesizes depend on the number of channels and the play time, and can be anything from 1GB and higher.