Microsoft has successfully resolved a known issue that was causing video recording and playing failures in certain apps on Windows 10 and Windows 11 systems. The problem was related to apps utilizing the WVC1 (Windows Media Video 9 Advanced Profile) codec, as disclosed by Microsoft in a recent update to the Windows release health dashboard.
The WVC1 codec is designed to enhance the traditional video codec model, incorporating discrete cosine transform (DCT) techniques shared by codecs like H.261, H.263, MPEG-1, MPEG-2, and MPEG-4. It also serves as an alternative to the popular MPEG-4 AVC (H.264) video codec standard.
The issue emerged after installing specific updates, such as KB5027303 or later, causing some apps to malfunction while playing back, recording, or capturing video using the WVC1 codec (VC-1). Additionally, certain cameras or webcams that defaulted to the WVC1 codec also experienced failures.
Impacted platforms included Windows 10 22H2, Windows 11 21H2, and Windows 11 22H2. The issue was triggered by preview cumulative updates released in the last two months, namely KB5028244, KB5027303, and KB5028245.
Thankfully, Microsoft promptly addressed the problem using Known Issue Rollback (KIR), a Windows feature designed to revert faulty non-security updates delivered via Windows Update. As a result, the fix has been applied, and users should see the improvements automatically within 24 hours on consumer and non-managed business devices. For those who wish to expedite the deployment, a simple restart of the Windows device can help.
For Windows enterprise-managed devices that were impacted, Windows administrators must install and set up a KIR Group Policy to ensure that the video recording and playing issues are completely resolved.
Here are the links for the KIR Group Policy:
- KB5027303 Known Issue Rollback – Windows 11 22H2
- KB5028245 Known Issue Rollback – Windows 11 21H2
- KB5028244 Known Issue Rollback – Windows 10 20H2, 21H1, 21H2 and 22H2
With this swift resolution, users can once again enjoy seamless video playback and recording experiences on their Windows 10 and Windows 11 systems.
Via: Bleeping Computer
