How can I convert .ifv videos to .mp3 audio format?
Converting Indeo Video Files directly to MP3 Audio Files (.ifv to .mp3 conversion) is, per se, not possible; at least not without a workaround. It relates to users attempting to extract the audio track (MP3) from an IFV video.
You will first need to convert IFV to MP4. Then you can easily convert MP4 to MP3.
The database currently does not contain any ifv software converter.