Macroblocking Issues with MPEG2 DVDs

[cybercat]

Hello friends, I need some tips on how to approach this problem I've been having. Basically all the DVDs I've been burning have medium/severe macroblocking and freezing issues when played back on a normal DVD player. The issue seems to be sporadic but happens around halfway into the disc. Reburing the disc causes it to show up somewhere else.

It doesn't seem to be an issue with the actual content, I use Nero to burn and the "verify" function says the data checks out. Also Nero ScanDisc surface scan says all burned sectors are good. So that makes me think it's at least not a physical problem with the disc. The discs play back perfectly fine on my PC with VLC so it looks like it's not a file-level issue either.

The actual content is sourced from an MPEG2 file rendered out from Vegas which is simply re-encapsulated into a VOB without recompression in DVD Architect and burned to a DVD using Nero. Anyone had this issue before? I could find incredibly little information about it, unfortunately.

The burner is an LG GSA-H22N for what it's worth.