homekit: fix reversed logic when there is no audio

plugins/homekit/package-lock.json

@@ -1,12 +1,12 @@
 {
    "name": "@scrypted/homekit",
-   "version": "0.0.142",
+   "version": "0.0.143",
    "lockfileVersion": 2,
    "requires": true,
    "packages": {
       "": {
          "name": "@scrypted/homekit",
-         "version": "0.0.142",
+         "version": "0.0.143",
          "dependencies": {
             "hap-nodejs": "file:../../external/HAP-NodeJS",
             "lodash": "^4.17.21",

plugins/homekit/package.json

@@ -40,5 +40,5 @@
       "@types/qrcode": "^1.4.1",
       "@types/url-parse": "^1.4.3"
    },
-   "version": "0.0.142"
+   "version": "0.0.143"
 }

plugins/homekit/src/camera-mixin.ts

@@ -4,11 +4,6 @@ import { getH264DecoderArgs, getH264EncoderArgs } from "../../../common/src/ffmp
 
 const { log, systemManager, deviceManager } = sdk;
 
-const extraEncoderArgs = [
-    '-b:v',
-    '${request.video.max_bit_rate * 2}k',
-];
-
 export const defaultObjectDetectionContactSensorTimeout = 60;
 
 export class CameraMixin extends SettingsMixinDeviceBase<any> implements Settings {
@@ -205,8 +200,17 @@ export class CameraMixin extends SettingsMixinDeviceBase<any> implements Setting
         if (key === 'h264EncoderArguments') {
             const encoderArgs = getH264EncoderArgs();
             const args = encoderArgs[value.toString()];
-            if (args)
+            if (args) {
+                // if default args were specified (ie, videotoolbox, quicksync, etc),
+                // expand that into args that include bitrate and rescale.
+                const extraEncoderArgs = [
+                    '-b:v',
+                    '${request.video.max_bit_rate * 2}k',
+                    '-vf',
+                    'scale=${request.video.width}:${request.video.height}',
+                ];
                 args.push(...extraEncoderArgs);
+            }
             const substitute = args?.join(' ');
             value = substitute ? `\`${substitute}\`` : value;
         }

plugins/homekit/src/types/camera.ts

@@ -253,7 +253,7 @@ addSupportedType({
                     args.push(...ffmpegInput.inputArguments);
 
                     // dummy audio
-                    if (!noAudio) {
+                    if (noAudio) {
                         // create a dummy audio track if none actually exists.
                         // this track will only be used if no audio track is available.
                         // https://stackoverflow.com/questions/37862432/ffmpeg-output-silent-audio-track-if-source-has-no-audio-or-audio-is-shorter-th