* VOB file modification

[pankov]

Is it possible to change the default audio stream in a vob file from DD5.1 to DTS 5.1 which is also in the VOB file? A guy in the AVS forums said that it should be possible with vStrip but after reading the guides for vStrip and AC3 Extraction I still don't have any idea.

Plaese, help me!

I'm asking this because I have 2 DTS trailers (The digital experience(the flying disc) and Experience) but they all play in DD5.1

[DSPguru]

you can remap audio substreams, but this probably won't help if DolbyDigial is the default decoder.
in this case you can try use vStrip in order to completely remove the ac3 substreams, and leave only the dts streams.

[pankov]

and how do I remap audio streams?

[DSPguru]

vstrip_gui, "3 output" tab, streams frame.

[pankov]

10x
I'll try this right after I go back home

[pankov]

Is there a way to find out which stream ID which real audio stream represents?
or can somebody take a gues which ID is the DTS track?

[DSPguru]

0xc0 (or 0xa0 ?), anyway, surely not 0x80.

[pankov]

:(
none of them is the dts track, or if it's then I'm doing something wrong
If you have time and no traffic limitation will you have a look on this:
ftp://212.43.218.146/dts-the_digital_experience.vob
you can find more DD and DTS trailers at
http://www.cinenow.com/uk/vobtrailer.php3

[DSPguru]

run the following commandline :
vstrip.exe dts-the_digital_experience.vob

it will print a summary of exisiting substreams inside the vob.

[pankov]

This is the result:

vStrip - version 0.8f_css, by [maven] (maven@maven.de), CSS-code by R0TfL.

Scanning for stream id's, press control-c to quit...
Saving 0xBF = Private 2 [@LBA 0]
Found VOB-ID: 01/CELL-ID: 01 [@LBA 0]
Saving 0xE0 = Video 0 [PTS 0:00:00.381 @LBA 1]
Width = 720
Height = 480
Aspect-ratio = [3] 16:9 display
Frame-rate = [4] 29.97 (30000/1001) fps
Saving 0xBD = Private 1, sub 0x80 [PTS 0:00:00.347 @LBA 118]
Saving 0xBE = Padding [@LBA 159]

Summary:
MPEG Packs = 16819
System headers = 50
Private 1 packets = 394, total bytes = 794920
Sub 0x80 packets = 394, total bytes = 794920 (delay -0:00:00.033)
Padding packets = 102, total bytes = 91247
Private 2 packets = 100, total bytes = 99900
Video 0 packets = 16375, total bytes = 33067460

:(
As far as I can understand this may be there isn't a dts track, correct?

[DSPguru]

i only see one soundtrack (0x80), and it's probably ac3.

[pankov]

I suppose the guy at the AVS Forum (http://www.avsforum.com/avs-vb/showthread.php?s=&threadid=128618&pagenumber=2) is mistaken or he is talking about different file.
:(

[DSPguru]

now i recall that DTS are usually on substreams from 0x88 to 0x8f :).
anyway, your vob only holds one soundtrack, and as you could see in your player (powerdvd/windvd ?) it's dolby-digital.

[MaTTeR]

I've got the DTS Experience VOB file on one of my old trailer CD's that I use for tweaking speaker setups. In fact I have several DTS trailer VOBs now that I think of it.

They do indeed play in DTS mode, I should say the one I have does;) I'm not sure why your not seeing the DTS stream, in fact I didn't know vStrip would allow such a thing.

[pankov]

@MaTTeR
Can you upload them somewhere?
I'm searching for dts trailers and for the moment I only have the one with the piano (the begining of Gladitor). I've dowloaded 3 from the site I've mentioned before but they only have a DD track (or I can't simply find the DTS track)
:(

I also downloaded a DD trailer from the same site
the dolby-train(long).vob and have problems with it:
I can play it without problems in PowerDVD and even in MediaPlayer with InterVideo's audio and video filters but when I start it in WinDVD the player crashes
:(
I tried vStrip and it sais the he cand find a key to decrypt it
-------------
vStrip - version 0.8f_css, by [maven] (maven@maven.de), CSS-code by R0TfL.

Scanning for stream id's, press control-c to quit...
Skipped 892 bytes for resync [@LBA 0]
Saving 0xBA = other [PTS 19:54:14.428 @LBA 0]
Skipped 907 bytes for resync [@LBA 9]
Skipped 117 bytes for resync [@LBA 18]
Saving 0x10 = other [@LBA 18]
Skipped 142 bytes for resync [@LBA 20]
Skipped 892 bytes for resync [@LBA 29]
Skipped 907 bytes for resync [@LBA 38]
Skipped 907 bytes for resync [@LBA 47]
Skipped 234 bytes for resync [@LBA 56]
Saving 0x19 = other [PTS 9:57:33.816 @LBA 56]
Skipped 262 bytes for resync [@LBA 57]
Saving 0x1B = other [@LBA 57]
Skipped 967 bytes for resync [@LBA 59]
Skipped 394 bytes for resync [@LBA 68]
Encountered encrypted sector, attempting key recovery [@LBA 68]

* Unable to recover key
-------------

Can I do something with this .vob?