How to analyze/detect corrupted frames ?

[Nitre]

Hello I have a problem, I bought about 20 video DVD's and many of them does include corrupted/damaged frames during playback. I have tried with totally 3 dvd roms + my standalone DVD player, so it's definitely nothing wrong with the hardware cause I get the same result on all of the players. So now I will have to go through all DVDs and look which dvds that I need to get replaced for non-defective copies. So my question is if there is any tools that will analyze/detect corrupted frames of this kind ? Cause I rather not watch through all these dvds!. It will be very time consuming, so I hope someone could help me with this, thanks.

[guns1inger]

Not reliably. You might try using something like the latest G-spot, which will try to read through the entire VOB file to get a bitrate reading, but it isn't really going to tell you if the image is corrupt, only if it can't actually read the file.

I am guessing this was a blk purchase from some dubious little corner of ebay ?

[Nitre]

Hello ok, I'm quite sure the vob is not corrupted, I think that something went wrong during the video transfer in the pressing plant...they are still professional done DVDs , but It's not commercial Hollywood dvds, the dvds are for a quite small market so to say...
I'm quite surprised that there is no tool for that..or any way to do this..must be..The frames are clearly corrupted, and the sound is corrupted at the same places...

[MrMoody]

I'll assume these are obscure foreign releases or something.

There are actually three ways you could get video anomalies from a DVD.

1) The data can't be read due to scratches, dirt, bad burn etc.

2) The data reads properly but the stream has errors in it due to bad encoding or file damage before the DVD was authored/mastered.

3) The source video had anomalies which are now dutifully encoded in the stream.

DVDDecrypter will catch #1, and if you can get a good read you can reburn a clean copy. I believe VirtualDubMod will catch #2 if you Scan Stream For Errors. Nothing will catch #3, the best you could do is edit it out with something like Mpeg2Schnitt.

[Nitre]

Yeah, it is definitely "3" out of those...not much to do then I guess, but thanks for your help!