BIS' lip synchronization utility, Wav2Lip (available from BIS' OFP editing page), has problems with certain file and path names.
According to Ondrej
Spanel, BIS' Lead Programmer, when you drop a
WAV file into Wav2Lip that has either a long path name or whose path contains
spaces, it will not work. Also, WAV files must be plain PCM files, no
compression codecs are supported.
Also, Wav2Lip works with Windows 2000 and XP but you may experience more problems there, as default desktop path names contains spaces. It is therefore not possible to drag and drop WAV files from a Windows 2000 or XP desktop to Wav2Lip.