I have an audiobook that is 10h long, but when I put it onto itunes so I can put it onto my iPhone (6), it gets truncated to 6h. Does anybody know why or how to fix? Note that the full 10h is clearly displayed using any other media player.
I'm using iTunes on Windows 10, if that's relevant
Edits - addressing comments
The mp3 file is around 250Mb and I'm using iTunes if that helps.