iPhones do not recognize flac music files. Here is a how-to guide, to get the flac file split up, and converted to individual mp3 audio tracks.
From Serge Letunovskiy
How to Join or Split Video files without Re-Encoding in Seconds. Join or Split mpg, mp4, m2ts files in seconds. This is the FASTER and EASIEST WAY.
From Maciej Piotrowski
How to convert MP4, MOV, MP3, M4A, MKV, FLV on Mac INSTANT DOWNLOAD ▻ http://goo.gl/cksq4 MacX Website: http://goo.gl/IgfFZ This is a brief overview ...
From Andy Slye
Combine videos in MP4, 3GP, avi, FLV ... and more formats .....Enjoy the video..
From K S Prasanth
Step by step guide on: How to join multiple .f4f clips into one file; How to convert F4F to FLV, MP4, AVI, MPG, 3GP, WebM, OGV, RMVB, WMV, MOV, MKV, VOB, ...
From Liberty Emily