VOB files - Is there any way to change the aspect ratio ?

[johnkd]

Hi,

I had two .VOB files extracted from two different DVDs . Since each of these were more than 2 GB in size , i followed this guide ( https://www.videohelp.com/forum/viewtopic.php?p=1341524 ) for authoring a new DVD .

1) First I demultiplexed the two VOBs using VOB Edit .
2) VOBEdit generated a single .m2v file (Combining both the VOBs) and a .ac3 file
3) Authored a new DVD using Remux option in IFO edit .

Now only I noticed that the second VOB file was of a different aspect ratio , ie 4:3. And this was lost during the demux process at Step 2 . The output DVD movie which IFOEdit produced is of aspect ratio 16:9 , may be becoz the first VOB file had an aspect ratio of 16:9 .

Unfortunately I donot have the ORIGINAL .vob files with me anymore .. I tried reauthoring the new DVD using DVDshrink to extract the second VOB, but that too produces a vob file with aspect ratio 16:9 .

Is there any way to get back my original VOB files with their original aspect ratios ?

rgds
John

[guns1inger]

You can rewrite the ifo files using ifoedit to change the aspect ratio, however if you have authored these into the one titleset, you are screwed as a titleset can only have a single AR.

[johnkd]

You can rewrite the ifo files using ifoedit to change the aspect ratio, however if you have authored these into the one titleset, you are screwed as a titleset can only have a single AR.

Oops.. I had renamed those source VOB files to VTS01_01.VOB and VTS01_02.VOB before demuxing . I still have those output (demuxed) files from VOBEdit . A single .m2v file (Vobedit has combined the two vobs into a single video file, I think) and a single .ac3 file

[borax]

1. You need to split the demuxed mpeg at the point where the change in the AR occurs. This can be done with mpeg2schnitt or cuttermaran.
=> 2 new m2v and ac3 files
2. Patch the wrong header(s) of the second m2v file with dvdpatcher or similar to the correct AR of 4:3.
3. Use authoring software that supports multiVTS for reauthoring. It is possible with ifoedit, but quite cumbersome...