To convert FLV to MP4 you'll need to use video converter. MP4-Converter is easily operated video conversion tool that can convert FLV to MP4. High speed of converting and batch mode will free your time for more desirable pastime. With MP4-Converter you can download, convert and copy YouTube videos to iPod/iPhone/iPad by clicking "Copy to iPod" button.
1. download MP4-Converter; 2. open software settings and select MP4 as output format. You can also set the desired output video resolution; 3. click "select files" button or simply drag'n'drop several files or folder into MP4-Converter window 4. click "Convert" button to start FLV to MP4 conversion;
If you check "Start Conversion Automatically" in Settings, MP4-Converter will download YouTube video and convert it automatically. -- Video Converter for Mac