OGV Video Not Displaying – Audio Only Playback in Latest CefSharp (Chromium Embedded) Builds

[menziesrm]

Is there an existing issue for this?

• I have searched both open/closed issues, no issue already exists.

CefSharp Version

131.3.50

Operating System

Windows 10

Architecture

x64

.Net Version

4.8

Implementation

WinForms

Reproduction Steps

Set up a CefSharp-based application using the same Chromium version bundled with SEB 3.9.0 (Chromium 120+).

Create or load an HTML page with the following markup:

Run the application and navigate to the test page.

Press play on the video element.

Expected behavior

The embedded OGV video (Theora video + Vorbis audio) should play with both video and audio rendering, consistent with prior CefSharp builds (e.g., Chromium 114 era) and current Chromium browsers with proper codec support.

Actual behavior

Only the audio portion plays — the video remains a black or blank screen.

Regression?

worked fine on previous versions.

Known Workarounds

N/A

Does this problem also occur in the CEF Sample Application

Yes using WPF/OffScreen command line args

Other information

No response

[amaitland]

CefSharp Version

131.3.50

This is an old unsupported version. M136 is the current.

Does this problem also occur in the CEF Sample Application

Yes using WPF/OffScreen command line args

Did you test with the CEF Sample Application? If not then please do so. If that works then you will need to test with https://github.com/cefsharp/CefSharp.MinimalExample

It's unlikely this is a CefSharp bug.

CEF has it's own issue tracker at https://github.com/chromiumembedded/cef/issues

Also make sure your video works in the corresponding version of Chrome.