How to convert FLV to MP4 on Mac OS? Portable players such as iPhone, iPod, iRiver, Creative Zen, Zune, etc has been not strange for us, with so small size that easy to carry along. A large number of video fans have chosen them to enjoy their favorite video downloaded from YouTube, myspace, Google video. However, there is a common problem facing them that most of the video from the video sharing community are FLV, which is generally unreconganized by their players. The FLV to MP4 Converter for Mac could help the Mac users to solve the problem with a few mouse clicks. The converter can convert the FLV to MP4 files which are playable on almost all portable players so that they can enjoy the YouTube videos on their portable players. Besides converting FLV to MP4, the converter could also convert the FLV files into various other video formats, such as WMV, avi, 3gp, etc and extract audios from videos.And the program can compress the FLV video to different file size (resolution) to accommodate to different screens. You can also customize the video by trimming, cropping and adding effect. In additional, with the converter, you could join several videos into a single video and enjoy videos. Maybe you wonder: what is FLV? What is MP4? How to use the FLV to MP4 Converter?... The following will give you the answers to these questions: First, what is FLV? FLV, standing for Flash Video, is one of the most popular video format on the Internet. FLV files are commonly found on the Internet, especially on these websites: YouTube, Google Video, Yahoo! video, Myspace, etc. Second, what is MP4? MP4, short for Moving Picture Expert Group-4, is also one of the most popular video formats. But, MP4 is a video format of a higher video quality than the FLV format. Meanwhile, most portable video players and almost all mobile phones support MP4 format, such as iPhone, iPod, iRiver, Creative Zen, Zune,etc. Finally, How to use the FLV to MP4 Converter? There is a guide for you to teach you how to use the converter. How to use the FLV to MP4 Converter to convert video Step1. Setup and Run the FLV to MP4 Converter for Mac After run the FLV to MP4 Converter, you will have a overall view on its friendly-user and clear interface, like the following picture. Step2. Import your video Click "Add File" button and select the FLV files you prepare to convert.(After you select FLV files, their source file names, original length and file formats, trimmed length and destination File names and formats are listed on the information window.) Step3. Set output format and output path On the bottom, select "*.MP4" as an output format in the drop-down menu next to the "Profile" field. (The program allows setting different output formats). Click the “Browse” button, it will open file window, browse to the directory to store the converted videos(Make sure the destination hard driver has enough space to save them). Step4.Cropping videos Hit the "Crop" on the main menu.Drag the white dotted line around the frame to define the area you want to crop out like the black sides. Step5.Start conversion After all settings have been done, just click the "Convert" button and the conversion will start right now.