Correcting VOB interlace

[sonyhome]

Is there a way to correct the interlace/interleave of a ripped
DVD with some VOB tool?

I want to re-burn the Wings of Honneamise DVD which was
badly manufactured as a 30fps non interleave DVD, even
though the stream IS interleaved (it's a known problem see
http://www.inwards.com/woh).

- Is there such a VOB tool that can allow me to tweak the
ripped VOBs? (i.e. flip the right bit saying it's an interleaved
stream)
- Is it technically easy to figure how to label the vob as interleave,
if yes I need the info how to do that to write the tool doing it or
edit the VOB with a debugger.

If I need to post-process the VOBs with something like tmpeg,
I suspect a big headdache to get a new DVD:

- easy: rip the mpeg stream
- easy: separate mpeg, 5.1 and subtitles streams (is it needed?)
- how to post-process it (to avoid quality degradation)
- how do you recombine it all in VOBs once re-processed?
- is it possible to just burn the DVD with the new VOBs, and
original menus or does one have to re-author the DVD?
If so how? I don't understand ifoedit...

Thanks!

[FOO]

Restream will change MpEG2 headers , but it only works on
elementary streams. (M2V)
you could demux the VOBs with Vobedit , apply restream ,
and put the M2V back in the VOB with ifoedit.

Somhow how I doubt a DVD is progressive though

[sonyhome]

Thanks FOO for the pointers, that got me started.
I also used 2COOL's remuxing guide to do the work.

Here's the whole solution I used:


WINGS OF HONNEAMISE, interlace correction

Issue:

Wings of Honneamise (WOH US version) is badly encoded.
It is a 30FPS stream apparently picked-up from a VCR tape.
While encoding the DVD they made a mistake and flipped on the
PROGRESSIVE bit in the VOBs, though at 30FPS streams are
always interleaved. This results in a very bad picture where
the interleave comb can be seen .

Solution:

Rip the DVD, extract the video stream, turn off the interleave
bit and rebuild the VOBs. Here's how I did it... It should apply
to any DVD that needs similar processing.

Step by step:

1- Rip DVD with DVDshrink 3.1, no compression
=> This rips the whole DVD to disk.
2- Extract the video streams of VIDEO_01*.VOB and
VIDEO_02*.VOB using VOBedit 0.6
- Open VIDEO_01_0.VOB
- click Demux button
- click demux all video streams checkbox
- press OK and provide output.
=> This generates VTS_01_0.m2v (resp. *02_0.m2v)
3- Launch RESTREAM
- Open VTS_01_0.m2v
- Uncheck Frametype progressive (since it's really interlaced)
- click Write! button.
=> This generates VTS_01_0.0.m2v, it is exactly the same
video stream except the interleave bit is now off.
4- Launch IFOEDIT to merge the video stream back to
the VOBs. There I follow 2COOL's remux guide... (BTW, WOH
has zero delays).
- Open the DVD's original VIDEO_01.IFO
- Click VOB extras
- set a destination directory (on the same
disk as the DVD rip, but different directory)
- pick the m2v file for remux VTS_01_0.0.m2v (i.e. the
deinterlaced one, with 0.0.m2v extention!)
- enable the remux, correct vob-unit, correct original ifo
- disable strip* boxes, create new ifo, split to 2 DVD-Rs
- disable autocopy menu files
- press OK, the VOBs, BUF, IFO get generated.
=> This regenerated VTS_01*.[VOB,IFO,BUF] files except
VTS_01_0.VOB.
5- backup the original VTS_01* files
6- replace them in the DVD rip directory with the new
VTS_01* files generated
7- copy back the original VTS_01_0.VOB which was not
generated (I suppose it contains the menus)
8- Fix-up the IFO with IFOEDIT
- (re)load the new VTS_01.IFO from the DVD rip directory.
- click get VTS sectors
say yes to all warning messages. If there's error messages
like file is read only, double check the files and re-run.
9- Do the same with VTS_02 files.
=> This generates a good DVD rip.
10- Try to play the DVD rip. It should work fine, except now
it's better: there's no more interlace artefacts. The picture's
still not great though since it's a VCR copy.
11- Rip the DVD again with DVDshrink 3.1 and recompress to
your liking to fit into a 4.5Gig DVD+/-R. Of course if you decide
to just rip the movie, you can skip fixing up VTS_02* files which
are the extras.
=> This reduces the ripped DVD size from 7GB to 4.5GB

Voila...

References:
An analysis of Wing of Honneamise's interlacing problem:
http://www.inwards.com/woh

2C 8)8)L's remuxing guide
http://forum.doom9.org/showthread.php?s=&threadid=66964

Thanks... I learned a lot, and the rip looks good

[sonyhome]

Thanks FOO for the pointers, that got me started.
I also used 2COOL's remuxing guide to do the work.

Here's the whole solution I used:


WINGS OF HONNEAMISE, interlace correction

Issue:

Wings of Honneamise (WOH US version) is badly encoded.
It is a 30FPS stream apparently picked-up from a VCR tape.
While encoding the DVD they made a mistake and flipped on the
PROGRESSIVE bit in the VOBs, though at 30FPS streams are
always interleaved. This results in a very bad picture where
the interleave comb can be seen .

Solution:

Rip the DVD, extract the video stream, turn off the interleave
bit and rebuild the VOBs. Here's how I did it... It should apply
to any DVD that needs similar processing.

Step by step:

1- Rip DVD with DVDshrink 3.1, no compression
=> This rips the whole DVD to disk.
2- Extract the video streams of VIDEO_01*.VOB and
VIDEO_02*.VOB using VOBedit 0.6
- Open VIDEO_01_0.VOB
- click Demux button
- click demux all video streams checkbox
- press OK and provide output.
=> This generates VTS_01_0.m2v (resp. *02_0.m2v)
3- Launch RESTREAM
- Open VTS_01_0.m2v
- Uncheck Frametype progressive (since it's really interlaced)
- click Write! button.
=> This generates VTS_01_0.0.m2v, it is exactly the same
video stream except the interleave bit is now off.
4- Launch IFOEDIT to merge the video stream back to
the VOBs. There I follow 2COOL's remux guide... (BTW, WOH
has zero delays).
- Open the DVD's original VIDEO_01.IFO
- Click VOB extras
- set a destination directory (on the same
disk as the DVD rip, but different directory)
- pick the m2v file for remux VTS_01_0.0.m2v (i.e. the
deinterlaced one, with 0.0.m2v extention!)
- enable the remux, correct vob-unit, correct original ifo
- disable strip* boxes, create new ifo, split to 2 DVD-Rs
- disable autocopy menu files
- press OK, the VOBs, BUF, IFO get generated.
=> This regenerated VTS_01*.[VOB,IFO,BUF] files except
VTS_01_0.VOB.
5- backup the original VTS_01* files
6- replace them in the DVD rip directory with the new
VTS_01* files generated
7- copy back the original VTS_01_0.VOB which was not
generated (I suppose it contains the menus)
8- Fix-up the IFO with IFOEDIT
- (re)load the new VTS_01.IFO from the DVD rip directory.
- click get VTS sectors
say yes to all warning messages. If there's error messages
like file is read only, double check the files and re-run.
9- Do the same with VTS_02 files.
=> This generates a good DVD rip.
10- Try to play the DVD rip. It should work fine, except now
it's better: there's no more interlace artefacts. The picture's
still not great though since it's a VCR copy.
11- Rip the DVD again with DVDshrink 3.1 and recompress to
your liking to fit into a 4.5Gig DVD+/-R. Of course if you decide
to just rip the movie, you can skip fixing up VTS_02* files which
are the extras.
=> This reduces the ripped DVD size from 7GB to 4.5GB

Voila...

References:
An analysis of Wing of Honneamise's interlacing problem:
http://www.inwards.com/woh

2C 8)8)L's remuxing guide
http://forum.doom9.org/showthread.php?s=&threadid=66964

Thanks... I learned a lot, and the rip looks good