Interesting the PrE 9 does not offer the MPEG-2 BD settings for BD authoring.
I find this especially interesting as Adobe Encore often does a better job, with fewer problems and higher quality, with the MPEG-2 BD Transcoding options.
Oh well, live and learn, and Ann, thanks for asking this question, as I did learn something from it.
Thanks, appreciate it.
Perhaps a marketing ploy - if Wikipedia is accurate that would only offer half the maximum run time of MP4.
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Where the positive aspect of the choice comes in is with the resultant quality (and sometimes the ease of authoring). Both formats/CODEC's are supported BD specs., and in certain cases, many have found the MPEG-2 BD to provide higher quality. I would anticipate that one criteria for that improvement might well be how much rapid motion is in the footage.
Also, I am only assuming that PrE is likely using the QT Player version of H.264, and that has caused some quality issues. Many have found that either the Lead, or MainConcept do a better job with H.264. Now, if one has say Apple and MainConcpt H/264, I wonder which will have priority in PrE? Then, there is X.264, but do not know the full applications of it, or its limitations. Some, encoding for computer playback, really like the results from it.