The Xvid codec compresses video files to make them smaller. It can compress video at a ratio of 200:1 or more compared to uncompressed video. This makes transmitting the video over a network speedy or saves you a lot of space on your computer's hard disk.

While Xvid compresses video very well, it can do so without causing visible quality loss and by retaining a sharper picture than other codecs do. Xvid is "lossy" compression but aims at removing just those picture details that are not important for human perception. As such, it be seen as a MP3 for video.

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I know that the best way is to preserve the original without re-encoding. But I'm actually worried that one day, these codec will be gone forever, which make typical media players unable to play. My personal experience is with Apple Quicktime mov file that is not playable from Jellyfin. Hence this fear. I don't even wanna know about Realmedia compatibility today.

In trying to install Xvid codec for VLC on my Ubuntu 16.04, I somehow ended up messing my package system, such that I cannot even install software upgrades - neither through the Software Updater, nor through apt-get upgrade

No, Shotcut uses very little of the multimedia subsystem on your Operating System and supplies its own using FFmpeg and MLT and other projects.

xvid is just a very slightly better implementation of MPEG-4 part 2 than FFmpeg, but it is not so relevant anymore since x264 (H.264) and beyond.

If you have trouble playing a certain video you have on your PC, or you're just looking to save some disk space by compressing old movies, XviD Video Codec should be able to accomplish those tasks for you. And if you're into tweaking your codecs' performance, this open-source software will not let you down.

XviD is an open source MPEG-4 video codec designed for everyone. Its purpose is to compress video in order to allow for faster transmission over computer networks or for more efficient storage on computer disks. Hence, XviD can somewhat be seen as a ZIP archive for video. XviD removes information from video that is not important for human perception in order to achieve very high compression rates while still keeping very good visual quality. XviD is published under the GNU GPL license. That means it can be obtained free of charge. And since XviD is open-source software, everyone can review the XviD source code to check for himself that nothing malicious is included.

I have downloaded the same Xvid codecs that I used for After Effects CS4, 32-bit Windows XP, but now that I am running Windows 7, 64-bit, After Effects CS5, Xvid does not appear as an avi video codec option.

Ok, so there are clearly issues with xvid and CS5. I have found a solution that keeps the program from freezing up while rendering out a single pass AVI (we use them when rendering short static videos).

I recommend you download the freeware K-Lite Codec pack. It comes with a plenthora of codecs all in one easy to use package. Includes:Divx, Xvid,WMV,3viX and they even have alternatives to Quicktime and Real. Klite

Xvid (formerly "XviD") is a video codec library following the MPEG-4 video coding standard, specifically MPEG-4 Part 2 Advanced Simple Profile (ASP). It uses ASP features such as b-frames, global and quarter pixel motion compensation, lumi masking, trellis quantization, and H.263, MPEG and custom quantization matrices.

Xvid is a primary competitor of the DivX Pro Codec. In contrast with the DivX codec, which is proprietary software developed by DivX, Inc., Xvid is free software distributed under the terms of the GNU General Public License.[1] This also means that unlike the DivX codec, which is only available for a limited number of platforms,[2] Xvid can be used on all platforms and operating systems for which the source code can be compiled.

In January 2001, DivXNetworks founded OpenDivX as part of Project Mayo which was intended to be a home for open source multimedia projects. OpenDivX was an open-source MPEG-4 video codec based on a stripped-down version of the MoMuSys reference MPEG-4 encoder. The source code, however, was placed under a restrictive license and only members of the DivX Advanced Research Centre (DARC) had write access to the project's CVS. In early 2001, DARC member Sparky wrote an improved version of the encoding core called encore2. This was updated several times before, in April, it was removed from CVS without warning. The explanation given by Sparky was "We (our bosses) decided that we are not ready to have it in public yet."[3]

In July 2001, developers started complaining about a lack of activity in the project; the last CVS commit was several months old, bugfixes were being ignored, and promised documentation had not been written. Soon after, DARC released a beta version of their closed-source commercial DivX 4 codec, which was based on encore2, saying that "what the community really wants is a Winamp, not a Linux."[4] It was after this that a fork of OpenDivX was created, using the latest version of encore2 that was downloaded before it was removed. Since then, all the OpenDivX code has been replaced and Xvid has been published under the GNU General Public License.

As an implementation of MPEG-4 Part 2, Xvid uses many patented technologies.[5] For this reason, Xvid 0.9.x versions were not licensed in countries where these software patents are recognized. With the 1.0.x releases, a GNU GPL v2 license is used with no explicit geographical restriction. However, the legal usage of Xvid may still be restricted by local laws.[citation needed] Fortunately, the Fedora Project, a community backed by Red Hat, has imported xvidcore to its repositories on January 24, 2023.[6] The last US patents expired in November 2023. The only patents left worldwide are in Brazil.

In July 2002, Sigma Designs released an MPEG-4 video codec called the REALmagic MPEG-4 Video Codec. Before long, people testing this new codec found that it contained considerable portions of Xvid code. Sigma Designs was contacted and confirmed that a programmer had based REALmagic on Xvid, but assured that all GPL code would be replaced to avoid copyright infringement. When Sigma Designs released the supposedly rewritten REALmagic codec, the Xvid developers immediately disassembled it and concluded that it still contained Xvid code, only rearranged in an attempt to disguise its presence. The Xvid developers decided to stop work and go public to force Sigma Designs to respect the terms of the GPL. After articles were published in Slashdot[7] and The Inquirer,[8] in August 2002 Sigma Designs agreed to publish their source code.[9]

Xvid is not a video format; it is a program for compressing to and decompressing from (hence the name codec) the MPEG-4 ASP format. Since Xvid uses MPEG-4 Advanced Simple Profile (ASP) compression, video encoded with Xvid is MPEG-4 ASP video (not "Xvid video"), and can therefore theoretically be decoded with all ASP-compliant decoders. This includes a large number of media players and decoders based on libavcodec (such as MPlayer, VLC, ffdshow or Perian). As of 2016[update], xvid.com carries binaries for using the codec.[10] However, early versions of the codec had a bug that prevented XviD-encoded files from being decoded with DivX, even when they were encoded using the DivX fourcc.

Xvid has a flexible, low-level interface that makes it easy to integrate it into larger applications. There is further a plugin API by which the codec can be enhanced with extra functionality without touching the core code. We further provide integrations for most of the popular multimedia frameworks like DirectShow, VfW or Gstreamer.

The Xvid codec is developed as an open-source project with all code published under the GNU General Public License (GPL). The Xvid project is a community effort that benefits from the contributions of many people from all over the world. The Xvid Codec's entire code is GPL and other than typical system libraries it currently has no further external dependencies.

Xvid's best feature is the excellent picture quality it provides even at high compression ratios. We put major emphasis on achieving the highest possible picture quality and using the latest algorithms for outstanding detail-richness and image fidelity. The Xvid codec is especially suited for offline, two-pass coding to prepare video for storage or distribution but works well in live-streaming also.

The Xvid codec was primarily developed for x86 but can be compiled also to other platforms like Mac or ARM. The Xvid code base supports both 32-bit and 64-bit CPUs and can be compiled for many operating systems like Linux, Windows or Mac OS X. Consequently, the Xvid library is frequently used in third-party software players or video encoder applications on many platforms.

The Xvid codec was created to promote the adoption of open standards, namely ISO MPEG-4 video, and in order to enable the interoperable creation and exchange of digital video between different software applications as well as among consumer electronics devices like DVD or Bluray players.

A major goal of our project is to stimulate further the creation of GPLed applications and to support the Free Software movement. Consequently, we publish the source code of the Xvid codec under the terms of the GNU General Public License, which ensures that derivative works must be distributed as a whole under the GPL as well.

The success of our Xvid project depends on your support. Any contribution you can make to the Xvid project is very welcome! New developers interested in joining the development of our xvidcore video codec library will definitely benefit from having some solid background in signal processing or at least be very comfortable with general C/C++ programming.

qpel Raise the number of candidate motion vectors by increasing the precision of the motion estimation from halfpel to quarterpel. The idea is to find better motion vectors which will in return reduce bitrate (hence increasing quality). However, motion vectors with quarterpel precision require a few extra bits to code, but the candidate vectors do not always give (much) better results. Quite often, the codec still spends bits on the extra precision, but little or no extra quality is gained in return. Unfortunately, there is no way to foresee the possible gains of qpel, so you need to actually encode with and without it to know for sure. 0852c4b9a8

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