Editing Dirac (video compression format) (section)

==Performance==

The algorithms in the original Dirac specification were intended to provide compression performance comparable to mainstream video compression standards of the time. A 2009 comparison of the Dirac and H.264 codecs, which used implementations from the second quarter of 2008, showed [[x264]] scoring slightly higher than Dirac.<ref name=etil>{{cite web |first=Till |last=Halbach |url= http://etill.net/projects/dirac_theora_evaluation/ |title=A performance assessment of the royalty-free and open video compression specifications Dirac, Dirac Pro, and Theora and their open-source implementations |date=March 2009 |archive-url= https://archive.today/20120707194336/http://etill.net/projects/dirac_theora_evaluation/ |archive-date=7 July 2012 |url-status=dead }}</ref> Another 2009 comparison found similar results for standard definition content, but did not compare high definition (HD) video content.<ref name="Ravi-MS-thesis">{{cite journal |last1=Ravi |first1=Aruna |last2=Rao |first2=K. R. |title=Performance Analysis and Comparison of the Dirac Video Codec with H.264/MPEG-4 Part 10 AVC |journal=International Journal of Wavelets, Multiresolution and Information Processing |date=July 2011 |volume=9 |issue=4 |pages=635–654 |doi=10.1142/S0219691311004341 |url=https://www.worldscientific.com/doi/abs/10.1142/S0219691311004341 |hdl=10106/1740 |hdl-access=free |access-date=18 December 2023 |archive-date=3 August 2023 |archive-url=https://web.archive.org/web/20230803072839/https://www.worldscientific.com/doi/abs/10.1142/S0219691311004341 |url-status=live }}</ref>
These studies show that Dirac compression performance is close to that of [[MPEG-4 Part 2]] Advanced Simple Profile (ASP, popularised as [[DivX]]). While also approaching low complexity H.264 encodes, a High Profile H.264 encoded video will have better compression for the same perceived quality.

Since 2010, royalty-free, open source video codecs such as [[VP8]], [[VP9]], and [[AV1]] have been developed with better compression performance and more widespread adoption, including dominant streaming services such as [[YouTube]] and [[Netflix]].<ref name="cnet-google-vp9">{{Cite web |title=Google's new VP9 video technology reaches public view |last=Shankland |first=Stephen |work=[[CNET]] |date=28 December 2012 |url= https://www.cnet.com/tech/services-and-software/googles-new-vp9-video-technology-reaches-public-view/ |access-date=19 December 2023 }}</ref><ref name="verge-nexflix-av1">{{Cite web |title=You can see Netflix's new AV1 streaming tech on select TVs and the PS4 Pro |first=Jay |last=Peters |work=[[The Verge]] |publisher=[[Vox Media]] |date=11 November 2021 |url= https://www.theverge.com/2021/11/10/22775150/netflix-av1-codec-tv-streaming-ps4-pro |access-date=19 December 2023 }}</ref>