Convert video From webm to 3gp

WebM is an open, royalty-free, media file format designed for the web. WebM defines the file container structure, video and audio formats. WebM files consist of video streams compressed with the VP8 or VP9 video codecs and audio streams compressed with the Vorbis or Opus audio codecs.

A 3GP file is a multimedia file saved in an audio and video container format developed by the 3rd Generation Partnership Project (3GPP). It stores video and audio streams transmitted between 3G mobile phones and over the Internet. Information from <a href='https://fileinfo.com'>FileInfo - The File Extensions Database</a>.