while maintaining the original file quality.
Use (view) the original file if you want original file quality.
Any export to DVD or Bluray DVD involves transcode and a variation from original "quality".
Your issue is "jagged edges" and you need a solution to that.
Provide your Sequence Settings and your Export Settings.
For all practical purposes, I agree. But Encore has a "pass through" option to put avchd on disk, but it must be bluray compliant. I have never used it. But it does not require transcoding:
See "AVCHD Passthrough" on this page:
A passing thought from a relative newcomer to Pr Pro CS6 and Encore - Are you judging the video quality on the monitor within Encore? My experience is that the video monitor within Encore is only for setting up menus and not for quality checking. I am currently working with SD and DVD (PAL) and find the Encore monitor of poor quality and with jagged edges. It is fine when the DVD, or in your case BluRay, is viewed after burning.
Seaspray - I will let the experts correct any bad advice here and perhaps I am adding nothing you already don't know or are doing. I recently went through the same exercise being new to PP CS6. Is that footage interlaced? I first drug a sample clip to the New Item button to create a matching sequence. I had some issues when I wasn't being careful about sequence settings matching, particularly putting interlaced in a progressive sequence. When I was ready to export, I chose the H.264 Blu-ray preset closest to my source footage. I made sure the key video characteristics matched - frame size, frame rate, progressive vs. interlaced, if the latter upper or lower, PAR, etc. etc. In some cases I tweaked VBR vs. CBR and bit rates. I then produced separate .m2v and .wav video/audio files. Then I imported those files as assets into Encore. You should then see Encore tell you it does not need to encode the video or audio after analysis. Unfortunatley, this process does require one encoding, but I don't believe there is anyway around that matter as PP CS6 apparently does not support "smart rendering". However, I think with just one encoding you are not going to see your footage noticeably degraded. Agreed, none of the monitors in PP or Encore should be used to judge quality. I also noticed major differences playing back files on my PC with various media players vs. PS3 + big TV.