MP4 was firstly specified as an audio
format with little relation with MPEG-4, and just like the
relationship between MP3 and MPEG-3. But now it tends to be
a video format and equals to MPEG-4 Part 14 with the
extension of *.mp4. It mainly stores digital audio and
video and audio streams respectively using Windows Media
Video codec and Windows Media Audio codec.
To convert mp4 to wmv file, please
install the appropriate mp4 decoder and audio decoder for
the mp4 format such as
FFDSHOW, DivX, XviD etc.
which can convert mp4 to wmv file. Select a wmv file, change
some parameters such as the video encoding bitrate,
audio encoding bitrate, resolution, frame rate etc if
If set the customized size to watch high
definition in 1280x720 (720p) or 1920x1080 (1080p)
resolutions, and increase bit rate, you may convert mp4 to
3IVX created by 3ivx Technologies is
the basic coding for MPEG-4. Itís a compression format based
on MPEG4 and quite similar to Xvid or DivX. 3IVX is not free
to create film with 3ivx encoding program, while which could
be freely downloaded and users need not setup Xvid and DivX
decoders again for 3ivx encoding programís being able to
play all formats that supported by MPEG4. Besides, owing to
high compression rate and fine image quality, it also
becomes a quite popular format on network.
To convert 3IVX to wmv, please install
filter. 3ivx is only codec, it can be contained in *.avi,
*.mp4, *.ogm, *.mkv file extension etc. Then convert a 3ivx
file for 3ivx to wmv in the video converter.