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Old 18th December 2009, 12:19   #1  |  Link
dwrbudr
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DGIndex interlaced content reported as progressive or dgdecode issue

Hi

I'm trying to rip Lost Season 5 episodic PAL DVD to H264.
Here's a screenshot from DGIndex:



Then I load this simple script into MPC:
Quote:
LoadPlugin("C:\Tools\filters\DGDecode.dll")
Mpeg2Source("c:\disc4\vts_11_1.d2v")
Here's a screenshot from MPC:


MeGUI "analyze" tool reports that the AVS is interlaced, bottom field first.

How from progressive PAL DVD it ends up to interlaced source with such a simple script?!

What am I doing wrong?

When I later try to encode this with x264 (1500kbps, preset slower), I get occasionaly such output:



Thanks in advance!
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Old 18th December 2009, 15:14   #2  |  Link
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Post a link to an unprocessed source sample.

If you read the documentation you will understand that the "progressive" indication in DGIndex does not mean what you think it means.
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Old 18th December 2009, 20:01   #3  |  Link
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Ok, I'll post VOB sample tomorrow. But how happens that the picture in DGIndex window is not interlaced?
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Old 18th December 2009, 20:05   #4  |  Link
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The two screenshots you posted are not the same frame. So, e.g., if you have hard telecine, you'll have 3 progressive frames followed by two interlaced one. You can also see things like that with blended fields. That's why I asked for a sample.
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Old 18th December 2009, 20:12   #5  |  Link
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also it might be the rare occasion of rff-flags within a PAL-Source. (which should be perfectly fine)

but most probably it is telecined/field-blended stuff (which is interlaced) encoded in progressive mode.
that means you chroma will be b0rked all the way.

Anyways a sample is necessary for further investigation.
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Old 19th December 2009, 09:45   #6  |  Link
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I think I've got what's causing this and that's it because I've clicked Yes on the message "Field Order Transition Detected".
Anyway here's is a VOB sample for you:

http://hotfile.com/dl/21136743/7255d..._11_1.VOB.html
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Old 19th December 2009, 16:06   #7  |  Link
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Correct. If you look at the first few lines of the D2V, you see this:

d00 5 0 2048 0 1 1 90 a0 a0 a0 a0 a0 a0 a0 a0 a0
d00 5 0 34816 0 2 1 d2 f2 e2 f2 f2 e2 f2 f2 e2 f2 f2 e2
900 5 0 61440 0 2 1 72 72 d2 f2 f2 e2
900 5 0 73728 0 2 1 72 72 d2 f2 f2 e2 e2

You can see that the initial black portion is BFF while the video itself is TFF. If you choose to correct field order, it will insert a field that will make all the frames interlaced when served.

Since field order doesn't matter for black video the right thing to do is to *not* correct the field order transition.
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