The FourCC : 3IV2 is explained here. The “3IV2”, it is a FourCC code that represents a video codec format developed by 3ivx Technologies. You will note that the FourCC code indicates that the video stream is encoded using the 3ivx MPEG-4 3.0.4 video codec.
FourCC : 3IV2
So the FourCC codes are mainly used in multimedia applications. This code allows the software or player to identify the format of video and audio data. This will depend on the code as there are also codes for the AVI and QuickTime formats. By using FourCC codes. This allows the multimedia applications to easily identify the correct decoder to use for a particular video or audio stream. Download the Codec here : 3ivx where the error is already explained.
3IV2 Decoders
– 3ivx DirectShow MPEG-4 Video Decoder
– 3ivx DirectShow MPEG-4 Video Encoder
These are the MPEG-4 Video encoder and decoder
– 3ivx DirectShow MPEG-4 Audio Decoder
– 3ivx DirectShow MPEG-4 Audio Encoder
These are the MPEG-4 Audio encoder and decoder
– 3ivx DirectShow Media Splitter
– 3ivx DirectShow Media Muxer
You can also see the DirectShow Media Muxer and Splitter are also in the files.
– 3ivx Video for Windows (VfW) codec
– 3ivx QuickTime MPEG-4 Video codec
Finally the video for Windows codec as well as the Quicktime codec is included. The software is trial software.
Difference between 3IV1 and 3IV2
The 3IV1 codec was the very first version of the 3ivx MPEG-4 video codec which was released in 2000. The codec offered low 
compression rates compared to other MPEG-4 codecs which had been available at the time of its release. It did provide excellent video quality but also came with limited features. It included such features as having interlaced video. However the codec did not support B-frames and global motion compensation which was a more advanced feature.
The next generation was the 3IV2 which was released three years later. This included more advanced features. It was improved compared to the first release. The second version offered much higher compression rates while still delivering the much needed high video quality. This version now also included support for B-frames and global motion compensation. In addition to this it was also now more compatible with the other MPEG-4 codecs.
Note also that the software works with Media Player Classic as well as with Zoom Player and VirtualDub.
You can buy the full version at https://3ivx.com/download/windows.html
3ivx MPEG-4 5.0.4
