CEF Forum

When watching videos from XFinity (http://xfinitytv.comcast.net/watch-live-tv/) inside the Chrome browser, the videos will only play when the "Allow identifiers for protected content" setting is checked (Settings -> Content settings... -> Protected content). I've created a simple c# winforms app with a cefsharp browser control. When I navigate to the video URL, I receive the same error as when the "Allow identifiers for protected content" setting is unchecked in Chrome. Is there a command-line argument or some other way in CEF to set this setting? I can't find any documentation related to this setting anywhere. Any help would be greatly appreciated.

It depends on what DRM system and video codecs they're using. If they're using Widevine then you can pass the `--enable-widevine-cdm` command-line flag. If they're using proprietary codecs then you'll need to build CEF/Chromium from source code yourself to enable them.

I tried setting the '-enable-widevine-cdm' flag, but no luck. I don't think it's a codec issue, unless XFinity uses different codecs for different stations. For example, ESPN (http://tvgo.xfinity.com/live/network/es ... ivetv_espn) plays just fine, but HGTV (http://tvgo.xfinity.com/live/network/hg ... ivetv_hgtv) does not. Is there a way to determine what Chrome's "Protected content" setting actually does and how it might translate to CEF? From everything I read about the Flash error code and from my testing in the Chrome browser, that is the setting I need to replicate in CEF.

Thanks.

It's possible that different stations require different DRM. As stated above CEF only supports Widevine (should be `--enable-widevine-cdm`, note the 2 slashes) and does not ship with proprietary media codecs. You can search the Chromium source code here: https://cs.chromium.org/.

How can you determine which codec the flash player is using when playing a video?

cas4 wrote:How can you determine which codec the flash player is using when playing a video?

If the video is played via Flash then it wouldn't depend on CEF for codec support. Are you specifying a `--cache-path` value?

I'm using cefsharp so I think so. I'm setting the CefSettings.CachePath property along with the PersistSessionCookies setting.

Code: Select all

var settings = new CefSharp.CefSettings();
settings.CefCommandLineArgs.Add("--enable-widevine-cdm", "1");
settings.CachePath = System.IO.Path.Combine(Application.StartupPath, "Cache");
settings.PersistSessionCookies = true;
CefSharp.Cef.Initialize(settings, false, true);


What OS, CEF and Flash versions are you using? How does it behave in the cefclient sample application when you run with `--enable-system-flash --cache-path=c:\path\to\cache`?

OS: Windows 10
CEF version: 51
Flash versions: latest version.

Using the sample application, I logged in and navigated to http://xfinitytv.comcast.net/live/netwo ... ivetv_hgtv. I get the same error. Attached is a screenshot.

The same thing happens if you try to play videos from http://view.yahoo.com. Sometimes video will play for 2-3 seconds and the message will be displayed after this. All is set correctly on my side including cache path but still fails. Any ideas ?