How to convert FLV to mp4 on Mac OS X ?

I've spent the last couple of hours trying to find a genuinely Mac software solution to converting my FLV's into MP4. So, any ideas of a true solution?----From Mac forum

When you download some interesting videos from YouTube you might thinking of sharing with friends on your iPhone, iPod touch or iPod nano anywhere at any time. Of course portable mp4 player won't play flv format. Thus, you need flv to mp4 converter for Mac. The best way to find a good Mac flv to mp4 converter is to free try using it first.

Aimersoft flv to mp4 converter Mac, also called Mac flv to mp4 transcoder, can help Mac users fulfill a perfect task on converting flv to mp4 on Mac. Apart from transcoding flv to mp4 on Mac, aimersoft Mac flv to mp4 converter also allows Mac users trim the video length or crop the video size. The latest version supports snow leopard. Free download it and free use it now!

After downloaded this Mac flv to mp4 Converter file successfully, double click it and launch aimersoft flv to mp4 converter for Mac.

Step 1: Import your flv file to Mac flv to mp4 converter

You can either drag flv files directly or import from "Add Video Files". Preview your video first. Click the device icon behind the video file to Choose output format. When you click on it, choose "Video Formats"-MP4" as the output format.

Step 2: Trim your flv video length or crop your video size

In the entrance of the editing interface you may see four editing buttons: Trim, Crop, Rotation and Video Adjustments. Each of them represents a special function. By clicking the different buttons you can achieve different functions here. For example you can trip your video into several segments, tune brightness, saturation, contrast in the Effect column, and crop into your ideal size in the Crop column.