There is no default codec.
I would suggest that you send to Compressor and use one of the DVD presets to create an MPEG-2 file. Not only will this be superior quality to anything encoded by DVDSP, it will guarantee compatibility and should prevent that error message.
My software:
Pro Maintenance Tools - Tools to keep Final Cut Studio, Final Cut Pro X, Avid Media Composer and Adobe Premiere Pro running smoothly and fix problems when they arise
Pro Media Tools - Edit QuickTime chapters and metadata, detect gamma shifts, edit markers, watch renders and more
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