After the FLV to MP4 conversion is complete, you can go to the output folder to play the converted MP4 video files, or sync them to your portable devices. Click the "Convert" button to begin your conversion.Simply choose "MPEG-4 Video Files (*.mp4)" as the output format, and then specify an output folder for saving the converted. This program supports batch conversion and allows you to convert multiple video files at one time. Launch the Video Converter Assist program.Follow the on-screen instructions to complete the installation. When the download is complete, double-click the download file to run the installation wizard.Click here to download the setup package of Video Converter Assist and save it in a place that is easy to find, such as your PC desktop.1Download and Install Video Converter Assist
Follow the steps below to see how simple it is to convert FLV to MP4 in Windows. Video Converter Assist is a simple yet powerful FLV to MP4 converter which can help you convert FLV to MP4 without any quality loss. So if you want to watch video you've downloaded from the web on a mobile device, you will probably need to convert it to a more universal format such as MP4. But most portable devices don't support FLV format.
Almost all video-sharing websites and social networks like YouTube, Vimeo and Facebook use this format for online video streaming. FLV (Flash Video) is becoming more and more popular over the internet since it can play in any web browser with Flash Player plug-in.