From 266be726065d286414bf449edd5a895ec91e6ac7 Mon Sep 17 00:00:00 2001
From: Roman Sokolov <12689+vityevato@users.noreply.github.com>
Date: Mon, 28 Apr 2025 00:04:00 +0300
Subject: [PATCH] Fixed an issue for some devices. They send screen width as
 not even value. (#1797)

---
 plugins/webrtc/package.json          | 2 +-
 plugins/webrtc/src/ffmpeg-to-wrtc.ts | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/plugins/webrtc/package.json b/plugins/webrtc/package.json
index 4d857b454..03439b087 100644
--- a/plugins/webrtc/package.json
+++ b/plugins/webrtc/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/webrtc",
-   "version": "0.2.77",
+   "version": "0.2.78",
    "scripts": {
       "scrypted-setup-project": "scrypted-setup-project",
       "prescrypted-setup-project": "scrypted-package-json",
diff --git a/plugins/webrtc/src/ffmpeg-to-wrtc.ts b/plugins/webrtc/src/ffmpeg-to-wrtc.ts
index ea2334b93..01ba416f2 100644
--- a/plugins/webrtc/src/ffmpeg-to-wrtc.ts
+++ b/plugins/webrtc/src/ffmpeg-to-wrtc.ts
@@ -458,7 +458,13 @@ export function parseOptions(options: RTCSignalingOptions) {
     if (options?.userAgent?.includes('Firefox/'))
         sessionSupportsH264High = true;
 
-    const transcodeWidth = Math.max(640, Math.min(options?.screen?.width || 960, 1280));
+    // Some devices return a `screen width` value that is not a multiple of 2, which is not allowed for the h264 codec.
+    // Convert to a smaller even value.
+    const screenWidthForTranscodeH264 = !options?.screen?.width 
+    ? 960 
+    : Math.trunc(options?.screen?.width / 2) * 2;
+
+    const transcodeWidth = Math.max(640, Math.min(screenWidthForTranscodeH264, 1280));
     const devicePixelRatio = options?.screen?.devicePixelRatio || 1;
     const width = (options?.screen?.width * devicePixelRatio) || undefined;
     const height = (options?.screen?.height * devicePixelRatio) || undefined;