I sometimes have to use the custom encoding settings to tell Toast to re-encode a programme recorded off digital TV, because the recording has a Group Of Picture (GOP) which does not comply with the DVD standard. (Toast used to manage this automatically but seems to have forgotten how in more recent versions - but that's another story that I'm taking up with Roxio Support.)
Can anyone recommend the optimum settings for encoding in situations like this?
Increasingly I am finding that a re-encoded programme has dreadful picture quality: things like stepped outlines on high-contrast edges within the image, and sometimes a sort of vertical striping effect which is rather reminiscent of the original John Logie Baird Televisor, if anyone has ever seen what the pictures on those used to be like. (No, I'm not that old! There's an example on Wikipedia)
Now, I know the the non-standard GOP is used by the broadcasters to squeeze a bit more picture quality out of a low-bitrate channel. But the original recording looks much better than the one burned to DVD, with many fewer of the sort of artifacts that Toast seems to be introducing. I usually try to set the bit rates to be as high as possible while keeping the programme fitting on a DVD. Is this not a good strategy?