From my many years of experience with ROIO of Live shows, I can say with confidance that ther are very few who can do a proper transcode.
The process of converting PAL->NTSC inherantly loses resolution.
I happen to run a site that trades lossless audio and video.
My mods download one of the 1gb files from every video upload and drop it in Gspot, mentioned above. If it was transcoded, gspots output would reveal that then it becomes a need to actually view the video to confirm the transcode.
Because of this, I do not allow any transcoded video (this really only applies to those that are PAL -> NTSC, NTSC->PAL is not a problem)
Gspot is THE best program out there for analysis of Video_TS formats...err...VOB....
There are many other ways to get the same data, but the accuracy of gspot prevails over all other.