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Multiview Video Coding (MVC) is an amendment of 2D plus Delta methodology (also known as 2D+Delta) to the H.264 (MPEG-4 AVC) video compression standard developed with joint efforts by MPEG/VCEG that enables efficient encoding of sequences captured simultaneously from multiple cameras using a single video stream.
MVC stream is backward compatible with H.264/AVC, which allows older video player devices and software decoders to decode MVC video streams while ignoring additional information for the second view, meaning that the stereoscopic image will not be available.
MVC is based on the idea that video recordings of the same scene from multiple angles share many common elements. It is possible to encode all simultaneous frames captured in the same elementary stream and to share as much information as possible across the different layers. This can reduce size of the encoded video.
Multiview video contains a large amount of inter-view statistical dependencies, since all cameras capture the same scene from different viewpoints. Therefore combined temporal and inter-view prediction is important for efficient MVC encoding. A frame from a certain camera can be predicted not only from temporally related frames from the same camera, but also from the frames of neighboring cameras. These interdependencies can be used for efficient prediction.
This methodology is known as 2D plus Delta, and the MVC specification itself is part of the H.264 standard as an amendment in H.264 "Annex H" of the specification.
As of January 2015 there is still no free and open source software that supports decoding MVC video compression standard. So popular open source H.264 decoders such as those used in the FFmpeg and Libav libraries simply ignore the additional information for the second view and thus don't show the second view for stereoscopic views. In most cases the reason for this is that MVC was not considered when the initial core H.264 decoder code was written so it was coded in one large chunk. Later amendment will often mean a lot of prerequisite code refactoring work, with major work in untangling and reordering some code, and splitting different functions in exiting decoder code into smaller chunks for simpler handling to make amendments such as MVC easier to add.
Some work has however been done in the past but never made it into official releases.