add frame rate management (#558)

Signed-off-by: Denis barbaron <denis.barbaron@orange.com>

lib/cli/device/index.js

@@ -1,3 +1,7 @@
+/**
+* Copyright © 2022 contains code contributed by Orange SA, authors: Denis Barbaron - Licensed under the Apache license 2.0
+**/
+
 module.exports.command = 'device'
 
 module.exports.builder = function(yargs) {
@@ -92,6 +96,12 @@ module.exports.builder = function(yargs) {
     , type: 'string'
     , demand: true
     })
+    .option('screen-frame-rate', {
+      describe: 'The frame rate (frames/s) to be used for screen transport on the network. ' +
+        'Float value must be > 0.0 otherwise the default behavior is kept'
+    , type: 'number'
+    , default: process.env.SCREEN_FRAME_RATE || -1
+    })
     .option('screen-jpeg-quality', {
       describe: 'The JPG quality to use for the screen.'
     , type: 'number'
@@ -164,6 +174,7 @@ module.exports.handler = function(argv) {
   , storageUrl: argv.storageUrl
   , adbHost: argv.adbHost
   , adbPort: argv.adbPort
+  , screenFrameRate: argv.screenFrameRate
   , screenJpegQuality: argv.screenJpegQuality
   , screenGrabber: argv.screenGrabber
   , screenPingInterval: argv.screenPingInterval