Stand H16, BVE, London
Open Broadcast Systems is pleased to announce its development and open-sourcing of a VC-2 HQ encoder and decoder. VC-2, formerly known as Dirac Pro, is ideally suited for mezzanine compression of video allowing HD to be transported using Gigabit Ethernet or 4K down Ten-Gigabit Ethernet at an ultra-low latency. As a core component in all of our products, FFmpeg 3.0 is the destination for this code, allowing any manufacturer to use and improve VC-2 encoding and decoding.
At the Broadcast Video Expo in London, we will be showing a low-latency encoder and decoder running on a wide range of hardware, from a software encoder you can fit in the palm of your hand, to high density blades, ideal for remote production.
Apart from being patent-free VC-2 has another trick up it’s sleeve compared to codecs not designed for video like JPEG2000. It doesn’t just have low generation loss, it has zero generation loss (thanks to its symmetric quantisation). Provided the downstream encoders are configured correctly (same bitrate, same slice-size etc.), there will be only a single encode generation, a unique feature in the industry.
VC-2 is also much more lightweight allowing reduced power consumption and encoding of higher resolutions without tiling and only requiring a modest bitrate penalty. However, in our implementation we’re going much further than many hardware manufacturers who are implementing only the simplest variant of VC-2.
Credit must go to BBC R&D for implementing high-quality, freely available, reference implementations and writing a clear specification.
Our implementation can be found in FFmpeg 3.0 which is available at www.ffmpeg.org