Genuine DVD analyzer

[Anakunda]

Hello,
is a tool or method available that can analyze VOB files and determine if they're original or were some way reencoded/tampered?, something the way like auCDtect works for AudioCDs..

[Ghitulescu]

If you ever used TAU, you would have found out what TAU actually does. SInce TAU positively identified originals as tampered it's a sign of how bad some CDs were mastered.
In terms of DVD, your software should be able to tell whether the DVD is original (copied with eg DVDdecrypter) or obtained from an AVI/MP4/H.264 obtained from a DVD.

[setarip_old]

@Anakunda

Hi! analyze VOB files

1) Do you actually mean individual .VOBs, or do you mean DVDs?

2) Do you mean by examining the .VOB (or DVD) by itself, or by comparing it to another copy?

[Anakunda]

yes I mean analysing the main video, if from VOBs or other control files I don't know. Assume only VOBs can identify the video structure.

[Ghitulescu]

Trying to find that a VOB is genuine is more like finding that a MP3 is genuine or not (from MP3 through eg dolby then reencoded back to MP3) - you are aware that VOB is already compressed, and thus some compression artefacts already falsified the original information.

This is why I asked you if you know how TAU works or just read the title. :rolleyes: TAU finds the compression artefacts (or mastering defects).

Coming back to your question: no, I am not currently aware of any software that can do this. Besides, my movies are originals and I assume the VOBs are also original (even if bought in Germany and not in the US). Well, some series sold in EU are more original than their US counterparts, at least concerning the audio score - it appears that the distributors failed to achieve the right for them for the US, so in the US they'll have a different music score. Funny, eh?

[mbcd]

But it could be possible to check the MD5-sum with an original disc.
If reencoded or if anything other is done to the files, this could be a possible way to find out.

Or am I wrong?

[Ghitulescu]

But it could be possible to check the MD5-sum with an original disc.
If reencoded or if anything other is done to the files, this could be a possible way to find out.

Or am I wrong?

If one has the originals then there's no need to find such a software, there are simpler methods to use.

The trick is to find out this info wothout having the originals.

[Anakunda]

Yeah I don't have the originals.
But as I found modified (or shrinked) DVDs have often stamp of reauthoring sw in media info, like TMPGenc DVD author or similar).
Unfortunatelly not unconditionally.

[Ghitulescu]

But as I found modified (or shrinked) DVDs have often stamp of reauthoring sw in media info, like TMPGenc DVD author or similar).
Unfortunatelly not unconditionally.
Some embedd their names into IFOs (Muxman, Ifoedit, some rippers etc.), others in the video stream (MPEG stream and/or its header) ...

[jdobbs]

Yeah I don't have the originals.
But as I found modified (or shrinked) DVDs have often stamp of reauthoring sw in media info, like TMPGenc DVD author or similar).
Unfortunatelly not unconditionally. Please review rule 6.