PurpleMan

Hello everybody.

I am recently working on the process of backing up HD-DVD while preserving menus, subtitles, and extras by reencoding the content to h264 AVC at lower bitrates to fit a DVD9 or a DVD5.

The problem up until now was that I was unable to mux using Scenarist ACA as it would not accept my input h264 files (which were encoded using MainConcept h264 Encoder). Since then, I have found out (thanks to MSDN HD-DVD forums) that the problem was Nero's directshow filters, and as soon as I uninstalled them - everything imported into Scenarist just fine. I was able to easily import the DD+ track with my encoded h264 and produce a new .EVO + matching .MAP file to replace with the equivalent ones on the original HD-DVD.

I altered the XPL to correspond to the codec change (changed from the original on-disc VC-1 to AVC) and started PowerDVD HD with alot of hope in my eyes. Unfortunately, the title would not play. It gets stuck when reaching the clip I reencoded/reauthored.

A bit of research led me to believe that this has something to do with the content of the HVA00001.VTI located on both the original disc and my reauthored titleset from scenarist from which I took the new .EVO/.MAP.

Does anybody know what information is stored in that file and/or how we can alter it to match the new .EVO/.MAP

Thanks in advnace.



Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

PurpleMan

Nobody has a clue Sad





Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

PurpleMan

Nobody knows Sad





Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

Andy Pennell MSFT

There is a chunk of Chapter 6 on this file AFAIK.




Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

PurpleMan

Thanks for replying.

I assume you're refering to a book of some sort. Can you direct me where to get it Smile

Thanks.





Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

Amy Dullard - MSFT

Andy is talking about the HD DVD specification available from the DVD forum (dvdforum.org)




Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

PurpleMan

I can't seem to locate it on that site. Is it a free document or do I have to purchase it

If the latter is true, I'd appreciate if someone could give me at least some information about the .VTI file.

Thanks Smile





Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

Andy Pennell MSFT

It costs $5k (for the first copy).




Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

Peter Torr - MSFT

Can you describe the purpose of this re-encoding Perhaps there are alternative approaches.




Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

PurpleMan

I'm trying to backup an HD-DVD to DVD9 while preserving the disc structure (advanced content and menus).

To fit the disc on a DVD9, my goal is to reencode the the VC1 video to a lower-bitrate H264, multiplex the new H264 into a new EVO to replace the one on the original disc, and thus making the entire disc fit on a DVD9.

Would love to get your input on different approaches.

Thanks in advance.





Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

Peter Torr - MSFT

Why not just do a lower bitrate encode from your master

And I am curious why you would choose AVC to save space; VC-1 is specifically designed to give high quality at low bitrates (as well as working incredibly well at high bitrates).






Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

PurpleMan

1) I don't have the master. I'm trying to backup a retail HD-DVD movie that I purchased. Back it up to fit a DVD9.

2) VC-1 is an inferior compressor to H.264. While what you say is true, VC1 is indeed designed to offer high quality at low bitrates, there is the matter of the definition of "low". H.264 (AVC) compresses about 20% better than VC1 (it also requires about 2 times the CPU power to encode at the highest quality, and 1.5x CPU power to decode). Meaning - when achieveing the same quality using VC1 and AVC, the AVC file will be 20% smaller in size.

Regards,

-PurpleMan





Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

Peter Torr - MSFT

This forum is for content authors, not consumers. We cannot help you with this.






Re: HD DVD Interactivity Authoring HDDVD backup and HVA00001.VTI

eric1969

Purple Man

I think it's inappropriate to ask this question on this forum. Someone correct me if I'm wrong, but not too many folks here share in your quest to publish an HD DVD back-up guide.

http://forum.doom9.org/showthread.php t=126033

In addition, this is a Microsoft site - I think you'll find the H.264 over VC-1 might not fly here. Smile