reversed macroblocks

[pawel.jasinski]

hi all,

I have a couple of DVDs with old trick movies. Some of the episodes recorded appear to have the quality problem (please note, not the entire DVD but only selected parts). I looked closer and what believe to see are macroblocks which are reversed in vertical direction. The angeled lines which should be smooth have kind of zigzag over it.

Can I rip the DVD and correct the problem (rip, reverse macro blocks vertically, encode)?

Thanks
Pawel

[Guest]

Post a link to a short unprocessed source sample that we can use to see the problem.

[pawel.jasinski]

Post a link to a short unprocessed source sample that we can use to see the problem.

The DVD which I suspected plays OK once inserted into the PC (perhaps this is the DVD player).
I don't have with me the other DVDs which caused the same effect on PC. I will post the link to ripped stream as soon as I am back at home (2 days).
When you ask for uncompressed, do you mean extracted raw mpeg2?

Pawel

[Atak_Snajpera]

When you ask for uncompressed, do you mean extracted raw mpeg2?
yep...

[pawel.jasinski]

Hi,


The sample can be picked up here (http://pawelssample.pbworks.com/f/sample.mpg). I thing I am wrong in describing it as reversed macroblocks, macroblocks are way bigger. It is more like the scan lines of the interlaced frames got swapped. Please, take a look at the head of the mole at the end of the sample.

--pawel

[scharfis_brain]

odd and even scanlines aren't swapped
they are more or less displaced.

this script may help to get rid of the stairstepping:
loadplugin("c:\x\dgdecode.dll")
loadplugin("c:\x\nnedi2.dll")
MPEG2Source("sample.d2v")
assumetff()
nnedi2(field=-2)
converttoyuy2()
merge(selecteven(), selectodd().crop(0,0,0,-1).addborders(0,1,0,0))

[pawel.jasinski]

odd and even scanlines aren't swapped
they are more or less displaced.

this script may help to get rid of the stairstepping:
loadplugin("c:\x\dgdecode.dll")
loadplugin("c:\x\nnedi2.dll")
MPEG2Source("sample.d2v")
assumetff()
nnedi2(field=-2)
converttoyuy2()
merge(selecteven(), selectodd().crop(0,0,0,-1).addborders(0,1,0,0))

can you drop the content of the sample.d2v ?
I am getting: "the input file is not a d2v project file" from the Mpeg2Source
I have tried dvd2avi to create the d2v file (new and old format). In both cases I get the same error.

--pawel

[Didée]

I have tried dvd2avi to create the d2v file
Welcome to the twenty-first century. DVD2AVI is widely depreciated since a long long time ... the current quasi-standard is DGMPEGDec (http://neuron2.net/dgmpgdec/dgmpgdec.html).

[pawel.jasinski]

never mind, it works with DGIndex

--pawel