Xvid is a primary competitor of DivX Pro Codec. It uses ASP features such as b-frames, global and quarter pixel motion compensation, trellis quantization, and H.263, MPEG and custom quantization matrices.

XviD is a video codec library following the MPEG-4 video coding standard, specifically MPEG-4 Part 2 Advanced Simple Profile (ASP). Top 5 Xvid to MP4 Converters to Convert XviD Video to MP4 Therefore, if you want to enjoy XviD video on portable devices, it is necessary to convert XviD to MP4. However, some devices like Apple devices iPhone iPad and even Plex are unable to play XviD, but supports MP4 perfectly. This is because XviD can minimize the file size while keeping the original video quality. People always share their self-made movie video using XviD format on Internet. Is there any recommendation for me? - from Yahoo Answer user Hey I'm looking for a converter that will convert XviD format videos to MP4 format so I can watch them on my iPod. How to Convert XviD Video to MP4 Format Easily and Quickly

Mp4 to xvid converter free