Using programs like Free Studio and similar video converters you should be able to convert Matroska WebM video files to 3GPP format.
Convert Matroska WebM video to 3GPP Third generation partnership project movie.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert webm to 3gpp on Windows
All-in-one package of DVDVideoSoft utilities and converters
Convert from webm file format
|Yes, Free Studio supports webm file conversion as a source file type.||No||No||No||No||No||No||No|
|Yes, Free Studio supports 3gpp file conversion as a target file type.||No||No||No||No||No||No||No|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.