I converted an iso of bd of the v1.6 with makemkv, the v1.6 are 23.976fps, but the audio gives problems when converting, so use airpowersoft mkv converter to convert the audio into an ac3 256 kbps, Necessary to replace the audio with mkvtoolnix (and you can also add subtitles with this same program). Once this is done, convert the modified mkv to bdtoavchd.
This is my AVCHD v1.6:
(I’m from Spain, sorry muy English)