You can easily convert FLAC audio files to 3GP format using many current audio conversion software like Freemake Video Converter. However, when you do so, you will loose quality in the resulting 3GP file as it utilizes a lossy compression algorithm.
Convert Audio files encoded by Flac - free lossless audio codec to Multimedia files for wireless networks.
We have found 5 software records in our database eligible for .flac to .3gp file format conversion.
Microsoft Windows software - convert flac to 3gp on Windows
A video editing software for Windows
Convert from flac file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned flac to 3gp. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Video converting software
Universal All Purpose Free Media, Audio & Video Converter Player Recorder
A multimedia converting tool for Windows
Apple macOS / Mac OS X software - convert flac to 3gp on OS X
Universal video converting software for Mac