Saving video to local machine using FMS

FMS can't save to the user's local drive... it can only save on the server. What you can do is use php or another application server, or the FMS file class, to move the flv to a public directory and give the user a download link after .flv file after it has been recorded.

For splicing video, you can use a server side stream and a playlist to record the clips to a new .flv file, but it's a slow process (1:1... so if you have 5 minutes of video in your clips, it will take 5 minutes to create the new FLV).