Problems with Network Releases

I just spotted a problem and when I've checked other discs thouroghly I've seen the same effect. I have only found it on Network dvd releases (they release UK classic TV series mainly). On each disc there maybe 2 or 3 chapters which suffer heavy pixelation and judder which seems to last the whole chapter then you get a perfect picture for the rest. I've just tried all 4 discs of The Sweeney - Series 3 and somewhere within the 3 or 4 episodes per disc is the above problem. I've tried CCE 2.5 and 2.67 with both the standard settings and one pass vbr, with the latest release of DVDRB. Anyone else come across this and is there a work around that I've missed?

See if you've got the "steal space from extras" or "half d1/half space for extras" selected. Sometimes the wrong things get selected as extras. I think most programs just assume the smallest VTSs are extras.

No they weren't selected but even so the problem occurs on individual chapters within titles. It's quite weird as you can be halfway through an episode and then it goes and doesn't correct itself until the next chapter. Just as a confirmation, I tried one problematic title with IC7 and DVDShrink3.2 and all of the chapters were okay with the same quality.

I have checked two consequetive chapters where one is bad then the next good and there does seem to be something showing when you check the Advanced VBR window in CCE. Anyway, I've kept all of the info and files, along with a couple of screen captures incase they can help someone identify this problem. In addition, I manually processed the episode containing the above chapters with dvd2avi then cce250, and although I only created the m2v file, that was free of any problems.

My mistake, with respect to the Advance VBR, as there was a caption card that was omitted from one which threw the timings, so I wasn't comparing like with like.

This problem with Network releases continues to annoy me and I've been unable to do any disc properly since identifying it. The main reason for using CCE is that the discs are always packed, around 8 Gb, and the results with any other encoder aren't very good. Is it possible that this is a deliberate action to prevent the easy copying of these titles? At the moment, for ease of use, I use RB and then identify the bad cell-ids. I then use CCE manually to correct the bad video streams before using RB to rebuild again. Therefore the error occurs in the encoding, so it must be down to the settings that RB is selecting. Within a title, 4 out of 5 cells are fine but one messes up (very bad blocking and motion artifacts - like the rate used was far too low). However, the settings are the same for adjacent cells where one is fine and the next not, and the size of the m2v files is appropriate to them being done properly. Is there any information I can supply which can help identify this bug? For information I've used several different versions of CCE and RB.