Return a string describing the event. For unknown events, NULL is returned.
Note that all events actually returned by the API will also yield a non-NULL
string with this function.
@param event event ID, see see enum mpv_event_id
@return A static string giving a short symbolic name of the event. It
consists of lower-case alphanumeric characters and can include "-"
characters. This string is suitable for use in e.g. scripting
interfaces.
The string is completely static, i.e. doesn't need to be deallocated,
and is valid forever.
Return a string describing the event. For unknown events, NULL is returned.
Note that all events actually returned by the API will also yield a non-NULL string with this function.
@param event event ID, see see enum mpv_event_id @return A static string giving a short symbolic name of the event. It consists of lower-case alphanumeric characters and can include "-" characters. This string is suitable for use in e.g. scripting interfaces. The string is completely static, i.e. doesn't need to be deallocated, and is valid forever.