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Ripping video from DVD

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Hi all,

I've been having trouble ripping the video off dvd's, I'm using DVDdecrypter as suggested in ADMs guide, and at first it seemed fine, but I now realize that the video seems to be missing about one third of the frames!

when I put the video in womble it has the correct duration but the video stutters and occasionally looks interlaced, when I play it in anything else (zoomplayer, realplayer, mediaplayer, powerDVD) it plays back sped up and has a duration reduced by about a third.

I can't understand why this is happening the only obvious difference to what ADM was doing is that I am using PAL DVDs. I've tried changing all sorts of settings in DVDdecrypter but I always get the same result (with exactly the same file size and duration).

If anyone has any good ideas as to what I'm doing wrong I'd really like to hear them.

Cheers.
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With that kind of corruption it sounds like your DVD drive is dirty....I'd try cleaning it or spend $20 on a new DVD-Rom?

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Didn't you get a "Pack header not found" error during the ripping ?
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Open your demuxed MPV file in VirtualDubMod and check the duration; also look through frame-by-frame to check if it really is interlaced.

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Originally posted by: vbangle
With that kind of corruption it sounds like your DVD drive is dirty....I'd try cleaning it or spend $20 on a new DVD-Rom?

I suppose that's possible, but I don't have a problem with any other programs accessing the dvd drive and all dvd's playback fine from the discs, plus it just seems far too repeatable to be caused by dirt.

Originally posted by: pittrek
Didn't you get a "Pack header not found" error during the ripping ?


I didn't get any error messages, here's the log from dvddecrypter in case it give any insight:

I 18:50:46 DVD Decrypter Version 3.5.4.0 started!
I 18:50:46 Microsoft Windows XP Professional (5.1, Build 2600 : Service Pack 2)
I 18:50:46 Initialising SPTI...
I 18:50:46 Searching for SCSI / ATAPI devices...
I 18:50:46 Found 1 DVD-ROM and 1 DVD±RW!
I 18:51:07 Operation Started!
I 18:51:07 Source Device: [1:0:0] BENQ DVD DD DW1620 B7W9 (D (ATA)
I 18:51:07 Source Media Type: DVD-ROM
I 18:51:07 Source Media Region Code: 2, 4
I 18:51:07 Source Media Copyright Protection System Type: CSS/CPPM
I 18:51:07 Source Media Implementation Identifier: Daikin U.S. Comtec Lab
I 18:51:07 Destination Folder: E:\BBCDVD1043\VIDEO_TS\
I 18:51:07 File Splitting: None
I 18:51:07 Detect Mastering Errors: No
I 18:51:07 Remove Macrovision Protection: Yes
I 18:51:07 Stream Processing: Yes
I 18:51:13 Decryption Key: DF 30 3C DC 59
I 18:51:13 Extracting Sectors...
I 19:02:09 Operation Successfully Completed! - Duration: 00:11:02
I 19:02:09 Average Read Rate: 7,153 KB/s (5.2x) - Maximum Read Rate: 10,702 KB/s (7.7x)


Originally posted by: Moth3r
Open your demuxed MPV file in VirtualDubMod and check the duration; also look through frame-by-frame to check if it really is interlaced.


the duration in virtual dub is correct and it plays back at normal speed, but some frames do appear interlaced (which shouldn't ever happen with PAL) I believe the missing frames are being filled in with an interlacing of the proceeding and following frame.


Thank you all for your thoughts, I will try cleaning my drive but I don't have much hope that it will help, any further suggestions are more than welcome.
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Originally posted by: Max_Rebo
the duration in virtual dub is correct and it plays back at normal speed, but some frames do appear interlaced (which shouldn't ever happen with PAL) ...
You shouldn't get interlaced frames with PAL for those movies shot on film. However, this was a made-for-TV movie, so it's possible that you're dealing with a poor NTSC-PAL conversion. This might be what's throwing Womble off, don't know, only ever used it once.

I can think of two possible solutions, neither is ideal:

1. Process the video with AVISynth or VirtualDub to try and make it progressive. This means re-encoding the whole stream.
2. Buy the Region 1 NTSC version and see if you get the same effects.

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Originally posted by: Moth3r
Originally posted by: Max_Rebo
the duration in virtual dub is correct and it plays back at normal speed, but some frames do appear interlaced (which shouldn't ever happen with PAL) ...

You shouldn't get interlaced frames with PAL for those movies shot on film. However, this was a made-for-TV movie, so it's possible that you're dealing with a poor NTSC-PAL conversion. This might be what's throwing Womble off, don't know, only ever used it once.

I can think of two possible solutions, neither is ideal:

1. Process the video with AVISynth or VirtualDub to try and make it progressive. This means re-encoding the whole stream.
2. Buy the Region 1 NTSC version and see if you get the same effects.


This was indeed a made for TV movie but as far as I know it was shot on film also there has never been an NTSC release of this dvd so option 2 is out.

I've been having a closer look at things and the sped up play in zoomplayer etc. doesn't seem to be related to the interlacing as I have tried ripping some different dvds and they all do the same but show no evidence of intelacing and all frames are present.

Since my reasoning for missing frames was the sped up play and that no longer seems legitimate I had another look and all the frames do seem to be there but many are interlaced, my new working theory is that the field order is wrong as I believe this would cause this effect, but I'm only guessing and I could be completely wrong.

anyway I seem to be having issues with my hard-drive at the moment so I'll have to have another look at this later.
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If you would like a second opinion, upload a sample of VOB somewhere and I'd be happy to have a look; PM me a link.

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Thank you Moth3r I will do that as soon as I can, unfortunately the hard-drive problem mentioned above has escalated and I've not currently got use of my larger hard-drive and my smaller drive hasn't got enough free space. I'll PM you about a sample when I'm back up and running.

Cheers.
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for those who may be interested, I have now fixed my hard-drive and been able to definitively establish that the field order is all messed up, and I'm now well on my way to sorting it out, thanks for all your suggestions.
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I see that you are ripping BBC DVD. I have quite a few BBC DVDs and most of them are interlaced and not progressive like most other PAL DVD's. Also the field order on a few is totally messed up so cause all sorts of problems when working with them. I guess its just typical that the BBC would use the cheapest bidder to produce their DVDs. You could try ripping the whole DVD to your hard drive first ( setting your prefs in DVDdecrypter not to split files and to have the maximum files size first) and then use VobEdit to strip the streams.

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