MPEG-4: Developed in 1998, MPEG4 was specially designed to play streaming media file with high quality. At present, MPEG4 has the attraction to be able to preserve small video files which have the video quality approaching DVD. Moreover, MPEG4 format has also contained the bit rate expandability, animation, copyright protection and some special functions which the former MPEG compression standard did not have.
FLV (Flash Video) is a file format used to view video content online. When you watch a video on YouTube or other video sites, you are viewing FLV format video and it supports the H.264 format. In fact, FLV is the standard MP4 files which has the ability to play back by Flash Player 9 or higher version.But this MP4 video format is not a good editing format.

The following FLV to MP4 Converter software has the ability to let the conversion job done easy and fast!
Step 1. Load Flash FLV videos to Aunsoft FLV to MP4 Video Converter.(For Mac user: Mac FLV to MP4 Video Converter)
Run Aunsoft Video Converter as the Flash video to MP4 converter, and click the Add button to browse the Flash videos you downloaded from YouTube, Hulu, Myspace, Dailymotion, iFilm etc. to computer hard drive.
Step 2. Choose MP4 output format.
There are actually various output formats you can choose from.You can simply select mp4 format under “Common Video” catalogue from “Format” drop-down list.
Also can choose HD Video->H.264 HD Video(*.MP4) as output video format. The AVC codec is actually the H.264 video codec. The application will automatically use the original video bit rate and frame size for keeping high quality with original resolution.

Step 3. Convert Flash video FLV to MP4.
Click the convert button on the bottom-right corner of the converter, and the conversion from Flash video to MP4 starts immediately.
Wait for a while and you can put and play the MP4 Videos on portable devices like iPad, iPhone 4,Motorola Xoom, Galaxy S, Galaxy Tab ,Zune, PSP, XboX 360, Apple TV, WD TV, Nexus One, HTC Android Phones, HTC Legend, HTC EVO 4G, Motorola Droid X, Droid 2..
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