Hi morganxtra
Please Open Fab click the Click the Green √ at top right corner of the DVDFab screen, and open Common Settings > General >A/V Codec, set Video Decoder to Software and set Video Encoder to Software restart Fab and try again.
Also please Open Fab click the Click the Green √ at top right corner of the DVDFab screen, and open Common Settings > DVD/Blu-Ray > Write > Writable Media "Size BD-25" make sure that it is set at 23000 restart and try again to see if you still get the error.
Hope this helps
CBR929