Encoded as interlaced, flagged as progressive

[Boulder]

I have a DVD source which apparently has the characteristics of the title above. The video appears to be encoded as interlaced - bobbing shows every frame is different in the scenes that were shot on video - but everything is flagged as progressive.

I'm about to clean up the video using Avisynth filters in DVD-RB. Is there anything I could do to tell DVD-RB that the video is interlaced and not screw things up, i.e. reflag the VOBs? I suppose DVD-RB rebuilds the structure as it is, there's no way to force it to consider a VTS as interlaced.

This post caught my eye: http://forum.doom9.org/showthread.php?p=945766#post945766. According to Don, pure reflagging is a no-no.

[Trahald]

@boulder
i am moving this to dvdrb forum. as the core of the question involves not necessarily the oddity of the video, but the oddity in conjunction with the app.

[jdobbs]

One way to do it is to open the associated .FLG files and reset bit 3 to 0 for each byte. That's the "progressive" flag for each frame. Then just do the REBUILD. The REBUILD will set the flags for all frames in the .M2V file to those identified in the .FLG file.

[Boulder]

OK, so I can force encoding as interlaced by editing the ecl file accordingly and then edit the flags. Thanks for the info :)