24 bit audio is outside DVD specs.
Tor

Nonsense.... Do you know the difference between CD and DVD?

Chesky Audio release DVD-Video discs with 24/96 audio, so do others. It is possible, DVDA specs clearly state that it supports 24 bit also...

So where and *why* do my files get reduced to 16?

Please don't answer if you have no idea what you are talking about.

M.

Here's what the DVDA manual says:
"Audio will not need to be recompressed if rendered as stereo or surround AC-3 files with a bitrate of less than 448 kbps or as stereo, 48.kHz, 16-bit, WAV (PCM) files."
I jumped to the conclusion that that was the specs - reasonably I would say. Sorry if it ruined your day.
Tor

You still don't get it. According to your logic, I wouldn't even be able to get 96 k. But I *can* get 16 bit 96 k. Just not 24/96.

Obviously you're reading another manual... The current one (page 16) clearly states that 24 bit PCM does not need to be recompressed, and so does the Optimize dialog. The sentence you quote does not exist in the current manual

Now please go back to playing around with your CD player and let me hope for answers from people who know what they are talking about.

M.

Are you trying to ouput PCM 24/96 or are you trying to encode AC3 ?

I don't know whether DVDA will support PCM 24/96 (perhaps someone from Sony can help on that)
As far as dolby goes:-
The Dolby Digital algorithm is capable of encoding up to 24-bit audio. In addition, all
DVD authoring systems can accept Dolby Digital (.ac3) files that were created from
24-bit audio sources. Dolby Digital decoders offer bit resolutions from 16 to 24 bits.

Dolby doesn't support 96kHz & although it supports data rates upto 640kbs players to gain Dolby certification only have to support playback at 448kbs.

As I say I can't answer if DVDA can accept PCM 24/96 but it is a budget authoring system ,so there are plenty of other limitations it has compared to what is actually available within DVD spec. The only authoring software I know that definitely does support 24bit 96kHz is Scenarist Professional & you are talking BIG money. (Even the lower versions of Scenarist which still cost many thousands of dollars don't support it)

I want 2496 Linear PCM... No AC3, no MLP. Haven't found any other authoring software that is able to do ot (except for unaffordable ones).

Despite the fact that the Optimize dialog says ok (no recompression), 24 bit audio is reduced to 16 (the DVD player says so, and I can measure the digital SPDIF output also.

M.

What about the player ?
DVD players are required to support all the variations of LPCM, but many subsample 96 kHz down to 48 kHz, and some may not use all 20 or 24 bits. The signal provided on the digital output for external digital-to-analog converters may be limited to less than 96 kHz and less than 24 bits.

The player (Panasonic DVD-S31) plays other 24/96 content (on DVD-Audio) without problems, I can detect 24 bit output at the SPDIF out.

I don't think it could be the player... And it's set to not downsample anything.

M.

I've created DVD's with 24bit,96K in Scenarist but never on DVDA. However, I just did a search on DVDA help section in DVDA 1.0c and it does say it supports 24bit, 96K PCM audio without having to compress or change bit depth. I will give it a try and see if I can get it to work. I'll get back to you! R

Any news?

I maybe totally off the track here, I'm assuming you're trying to make a DVD-Video disk with 24/96 audio. Maybe DVDA only suports that for DVD-Audio or else music compilations.

BTW I assume you set the project properties to 24/96?

Sorry if this doesn't help much but looks like this thread is dying!

Sorry for the delay! I didn't have any 24/96k files on my PC and I had to figure out how to strip them off a DVD. I finaly figured that out. At first I thought that maybe it was because you had auto set for the audio encoding but I defaulted to LPCM for audio and the DVD authoring seemed to do its job and not re-compress. However, the IFO file says 16/48k and WinDVD will not load the VIDEO_TS folder correctly. It may be that this is a bug in the authoring process. Why hasn't Sony responded to this thread? It seems to play it back in the preview before authoring as a 24/96K track. From what I read, DVDA should work with 24/96K. This is a bug that needs to be fixed.

OK figured it out! Music compilation must be selected however I see others on the forum have had problems with playback on some DVD players. Music compilation also re-renders the video which takes up time. It wouldn't allow a compliant video file to not be re-rendored. I'll try a still image and see if that works better.

Well it looks like the IFO file still says 16/48K with music compilation! Not good! This is why some players are having problems...is my guess. Sony where are you?

DVDA does not support DVD-Audio as a format.

And it's the same with Music compilations.

I don't see a way to set "project properties" to 2496. The question is only whether you set the audio to be recompressed (which will create 16/48 files) or not.

If 96 k is possible, why not 24 bit?

Who cuts off those 8 bits?

Anyone from Sony?

M,

OK! You can use IFOedit to fix the VIDEO_TS.ifo and the VTS.ifo files so that stand alone players will playback correctly. Until Sony fixes this that is. I checked the VOB files and they are 24 bit. Using IFOedit you can go into the VIDEO_TS.ifo file under VMGM_MAT, then scroll down to VMGM audio attributes. Open that line and set bit depth to 24 bits and on sample rate, clear it to blank (no text). Save both the ifo and bup files as prompted. In the VTS.ifo file select VTSI_MAT, then on each Aud_x: audio attributes line modify as in the VIDEO_TS. ifo file. Save and your VIDEO_TS folder can then be burned to a DVD without error. Cheers!

Hi M,

The VOB files are correctly rendored as 24 bit. The sample rate flag is set to 1. 1 is 96K! It is just the IFO files that are set wrong. See my other postings for a work around.

R.

Brilliant... Just brilliant. It works.

Thanks a ton.

BTW, how did you check the VOB files?

M.

I used what else...VOBedit! These two programs are wonderful tools. Be carful though. I've read that VOBedit has some bugs when used as a stream processor stripping streams. I use Vstrip for that process. Using the editing features to compare compliant IFO and VOB files to something created by consumer authoring software is worth a million. Great debug tools! All you have to do is load one of the VOB files into VOBedit and click on one of the audio packs and then scroll down to (L) PCM stream info and there it is. 24 bit and sampling flag set to 1. 0=48K. I'm beginning to think that a lot of the problems I've read on this forum with player issues are because DVDA does not set the flags correctly in the IFO files, in some cases. In some players the firmware does not read the entire IFO file and they work fine because they only read the VOB file header. Other players read the IFO files and then...problems. That's my guess. I'm glad it worked out for you. I'm happy I figured this out cause Sonic Scenarist is a pain to work with and DVDA will be much easier to create DVD's with 24/96K. Sony will fix it and looking back at Vegas...this program will rock after future upgrades and the bugs are fixed. The user interface could be a little easier. I like DVD workshop for my home video work. However, DVDA supports progressive video were DVD Workshop is strickly interlaced.