The best way to convert FLV to MP4

1. What is Flash video FLV?
FLV, short for Flash video, is a video format played in Adobe Flash Player. If you download a video from YouTube, Google Video, Yahoo! Video, DailyMotion etc, it is most likely a Flash video with the file extension .flv. With the wide availability of Adobe Flash Player in most common web browsers, Flash video has become the most popular format for online video delivery!
2. What is MP4?
MP4, short for MPEG-4 Part 14, is a multimedia container format standard specified as a part of MPEG-4. It is commonly used to store digital audio and video streams, especially those defined by MPEG, it can also be used to store other data such as subtitles and images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. The official filename extension for MPEG-4 Part 14 files is .mp4, thus the container format is often simply referred to MP4.
3. How to convert FLV to MP4.
Convert FLV to MP4 is for playing flash videos on different devices like iPod, Apple TV and so on. Generally, there are two ways to convert FLV to MP4: either to convert FLV to MP4 with online conversion services, which can be easily searched in Google or to convert FLV to MP4 with FLV to MP4 converter like FLV Converter. This FLV converter can perfectly convert FLV to MP4, convert FLV to many other more popular video/audio formats. Using the video editing functions it has provided, you can get your flash video cropped, trimmed and logoed during the FLV to MP4 conversion. The tutorial below will show you the easiest way to how to convert flv to mp4.

Step 1: Launch DRM Media Converter and click "Add" to input FLV files.Click "Add File(s)" button on the toolbar or "File > Add File(s)" to load FLV files you want to convert. Or click "File > Add Folder" option to add all files in the folder you select.
All the loaded files will be displayed in the file list, and are all checked by default.
Step 2: choose output format.
The default output format is the one you selected last time. If you want to change the output format, then choose the file, click to open "Profile" drop-down list below the file list or in the "Target Profile" column, and choose the desired format from it. Click "Browse" button to set the destination folder for saving the output files.
Step 3: convert
Make sure all the files you want to convert each have a check box next to them, and click the "Convert" button on the toolbar to start converting all the checked files in batches.
More source: best mp4 to avi converter, how to convert mp4 to dvd.