Merge pull request #243951 from chriswhilar/patch-73

Update raw-media-access-javascript.md

Author: prmerger-automator[bot]

articles/communication-services/quickstarts/voice-video-calling/includes/raw-media/raw-media-access-javascript.md

@@ -300,7 +300,8 @@ console.log(localScreenSharingStream.mediaStreamType) // 'RawMedia'
 ```
 
 ### Access the raw screen share stream from a screen, browser tab, or app, and apply effects to the stream
-
+The following is an example on how to apply a black and white effect on the raw screen sharing stream from a screen, browser tab, or app.
+NOTE: The Canvas context filter = "grayscale(1)" API is not supported on Safari.
 ```js
 let bwTimeout;
 let bwVideoElem;
@@ -322,6 +323,7 @@ const applyBlackAndWhiteEffect = function (stream) {
 	    try {
 		let begin = Date.now();
 		// start processing.
+		// NOTE: The Canvas context filter API is not supported in Safari
 		bwCtx.filter = "grayscale(1)";
 		bwCtx.drawImage(bwVideoElem, 0, 0, width, height);
 		const imageData = bwCtx.getImageData(0, 0, width, height);