Project Summary
x265 is a commercially funded open source implementation of the H.265/High Efficiency Video Coding (HEVC) compression standard.
The primary goal of the x265 project is to bring the quality and speed capabilities of x264 to the H.265 compression standard.
The x265 project is coordinated by MultiCoreWare who bring significant technical and academic leadership to the project. The project also has several corporate sponsors whose generous contributions have allowed the project to exist.
In a Nutshell, x265...
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has a well established, mature codebase
maintained by a very large development team
with decreasing Y-O-Y commits -
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took an estimated 89 years of effort (COCOMO model)
starting with its first commit in March, 2013
ending with its most recent commit 22 days ago
Quick Reference
Commercial license available
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These details are provided for information only. No information here is legal advice and should not be used as such.
GNU General Public License v2.0
Permitted
Commercial Use
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Distribute
Place Warranty
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Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
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These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryMay 15 2026 — Jun 14 2026
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12 Month SummaryJun 14 2025 — Jun 14 2026
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