I wanna know what formats does encore accept, to avoid having it doing the transcoding when authoring a DVD.
For DVD, you need to use MPEG-2 DVD, period. Of course, set the bitrate so the encoded video will fit the DVD - if file is too large, then Encore may have to transcode anyway to fit.
In Adobe Media Encoder, stand-alone or via Premiere > Export, look for MPEG-2 DVD format, then there will be several presets available like DV NTSC, DV NTSC Widescreen, Progressive, etc. and just choose what is appropriate to the material, set bit rate, and export. This will give you TWO files - .m2v video and .wav audio. Encore likes it that way, just put both into Encore. By default, the audio will get (quickly) transcoded to Dolby Digital .ac3, reducing the file size, and video should be left alone.
If coming from an HD source/sequence, you may see thin black bars at edges of export preview - set Scale to Fill to eliminate bars before exporting.
Safe Harbor Computers
"In Adobe Media Encoder, stand-alone or via Premiere > Export"
Is Adobe Media Encoder the same as Adobe Encore?