REGRESSION(272806@main): [Debug][GStreamer] ASSERTION FAILED: The str…

…ing being removed is an atom in the string table of an other thread! in ~_WebKitVideoEncoderPrivate()

https://bugs.webkit.org/show_bug.cgi?id=267537

Reviewed by Philippe Normand.

Making an isolated copy of the passed codec string fixes the issue.

* Source/WebCore/platform/gstreamer/VideoEncoderPrivateGStreamer.cpp:
(videoEncoderSetEncoder):

Canonical link: https://commits.webkit.org/273048@main

Source/WebCore/platform/gstreamer/VideoEncoderPrivateGStreamer.cpp

@@ -390,7 +390,7 @@ static bool videoEncoderSetEncoder(WebKitVideoEncoder* self, EncoderId encoderId
         }
     }
 
-    priv->codecString = codecString;
+    priv->codecString = codecString.isolatedCopy();
     encoderDefinition->setupEncoder(self);
 
     encoderDefinition->setBitrateMode(priv->encoder.get(), priv->bitrateMode);