PhD8 can import the video formats shown in this table. Note that the Mac version has some limitations in this.
Frank,
As suggested by Robert (The Shadowman) in the other thread, could you please indicate the details of videos that are failing to import & bringing up the "H.264" alert? From which camera(s) are the source footage?
Using the Windows version of PhD8, I haven't had any issues importing H.264 encoded videos.
PIX PIX YouTube channel