webrtc: fix mtu issue on cell networks

plugins/webrtc/.vscode/settings.json

@@ -1,4 +1,4 @@
 
 {
-    "scrypted.debugHost": "127.0.0.1",
+    "scrypted.debugHost": "koushik-ubuntu",
 }

plugins/webrtc/package-lock.json

@@ -1,12 +1,12 @@
 {
    "name": "@scrypted/webrtc",
-   "version": "0.0.125",
+   "version": "0.1.1",
    "lockfileVersion": 2,
    "requires": true,
    "packages": {
       "": {
          "name": "@scrypted/webrtc",
-         "version": "0.0.125",
+         "version": "0.1.1",
          "dependencies": {
             "@scrypted/common": "file:../../common",
             "@scrypted/sdk": "file:../../sdk",

plugins/webrtc/package.json

@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/webrtc",
-   "version": "0.0.125",
+   "version": "0.1.1",
    "scripts": {
       "scrypted-setup-project": "scrypted-setup-project",
       "prescrypted-setup-project": "scrypted-package-json",

plugins/webrtc/src/ffmpeg-to-wrtc.ts

@@ -190,8 +190,11 @@ export async function createTrackForwarder(options: {
     // ipv4 mtu is 1500
     // so max usable packet size is 1500 - rtp header - tcp header - ip header
     // 1500 - 12 - 20 - 20 = 1448.
-    // but set to 1440 cause that's what cameras seem to use for some reason.
-    const videoPacketSize = options.ipv4 ? 1440 : 1300;
+    // but set to 1424 just to be safe.
+    // 1/9/2023: bug report from eweber discovered that usable MTU on tmobile is 1424.
+    // additional consideration should be given whether to always enforce ipv6 mtu on
+    // non-local destination?
+    const videoPacketSize = options.ipv4 ? 1424 : 1300;
     let h264Repacketizer: H264Repacketizer;
     let spsPps: ReturnType<typeof getSpsPps>;