VoxImplant. Blog

Category Archives: News

VoIP Push Notifications support for iOS SDK has arrived

Dear Voximplant developers, we are happy to announce that Voximplant now supports VoIP Push Notifications for calls to iOS SDK. We tried to make everything as simple for developer as possible; the following steps are required to enable VoIP Push Notifications for your app:

1. Upload your Apple VoIP Push certificate at https://manage.voximplant.com/#certificates and specify (bind) Voximplant application(s) where you will be using VoIP Push functionality

2. Add

require(Modules.PushService);

in the beginning of your VoxEngine scenario

3. Now VoxEngine’s callUser and callUserDirect functions will start using VoIP Pushes to notify the SDK about incoming calls. (same applies to helper functions: forwardCallToUser and forwardCallToUserDirect)

4. Get new version of iOS SDK at http://voximplant.com/docs/references/mobilesdk/ios/

That’s it!

P.S. Android Push support is on its way to production, expect it right after the New Year in January 2017!

New billing for video calls running via servers

We are happy to announce that currently video calls that go via Voximplant servers (not P2P ones) are billed per megabyte of video traffic. Since the resolution of a video stream can be different (so as fps, video codec and other params) it means that per minute billing was a bad idea for this case – 1 minute of video call generates different load on our infrastructure depending on various parameters. So now the formula for video call going via Voximplant servers looks as follows:

SDK-platform / platform-SDK call – $0.002 per minute per call leg
+ $0.001 per megabyte of video traffic sent to the platform

See http://voximplant.com/pricing/ for the details

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High quality Speech Recognition is now available

RecognitionHi everyone! We’ve been busy working on new cool features for you, many developers asked us about high quality speech recognition for both audio call records transcription and real-time recognition scenarios. We are happy to announce that this functionality is now available for all our developers.

Voximplant Web SDK v4 beta is now available with Edge/ORTC support

WebSDKv4We have released new version of Web SDK, it has been fully rewritten. New version will help us to accelerate the development process and includes a lot of new features and improvements. Key features of Voximplant’s Web SDK 4.0 include:

  • Support for audio calls in Microsoft Edge. With Microsoft recently updating the browser’s web and audio support, Voximplant is one of the first companies to make its platform compatible with Edge. With Web SDK 4.0, web apps are empowered to handle incoming and outgoing voice calls from within the Edge web browser. Video calls in Edge will be functional as soon as VP9 or h.264 codec support is added to the browser.
  • Video can be enabled during an existing audio call. Now developers can create web apps that offer a Skype-like “enable video” option during active audio calls. Video can be enabled or disabled at any time during the call.
  • Both local and remote audio and video streams can be modified by applying filters. Developers can now modify video and audio streams in realtime. Possible applications of this feature include using video and audio filters to add watermarks, hide or alter faces, mask voices, etc.
  • h.264 video codec can be set as “high priority”. The “h.264” video codec is known for its valuable speed in modern hardware, especially in mobile devices. Developers can now force this codec to provide better video quality with less CPU usage.

Additional enhancements include:

  • Reduced latency of audio and video calls.
  • Improved syncing between audio and video tracks.
  • Calls within the Chrome browser now maintain better performance – even with poor network conditions.
  • Peer-to-peer connections can now be enabled in scenarios using JavaScript in the cloud.
  • Audio and video codec priorities can be manually configured.
  • Full support for WebRTC to offer users the best in voice and video quality.

New SDK also supports asynchronous initialization and drops support for Flash, which can still be used with legacy systems via 3.x versions of the SDK. Complete documentation for Voximplant’s Web SDK 4.0 beta can be found at https://voximplant.com/docs/references/websdk4/

HD Audio Playback / Streaming

This post is short and simple: your mp3 or ogg files played on VoxEngine scenario level with call.startPlayback or using Player will be played on the Web or Mobile SDK side in HD quality (48KHz), or on SIP side if it does support wideband audio codecs (Speex or Opus). It also appeared that Opus has 3 encoding presets – auto / speech / music, currently we use auto, but maybe we will let developers decide which preset can be used on VoxEngine scenario level later.

HD Audio Conferencing

HD Audio Conference

We were quite busy working on HD audio conferencing support and now it’s available for all VoxImplant developers. In HD mode audio is being mixed at 48KHz, all audio sources with lower sample rate will be resampled to 48KHz. Web and mobile SDK uses Opus audio codec and offers the best possible audio quality. Up to 100 participants can be connected to a conference.

It’s simple to enable HD mode for a conference in VoxEngine scenario:

// HD mode can be enabled for the conference by passing hd_audio parameter set to true
var conf = VoxEngine.createConference({ hd_audio: true });

You can learn more about building audio conferencing services using VoxImplant in our tutorial. HD audio conference demo available at https://demos.voximplant.com/hdconf/ (optimized for WebRTC browsers) , the demo app source code is available at https://github.com/voximplant/voxhdconf

HD Audio Recording

HD_recording

We’ve been offering audio recording for a while, but our audio recorder was saving audio in 8KHz, since it’s the most used format in good old telephony and when we have calls to/from PSTN. When we work with VoIP endpoints that do support wideband audio (WebRTC, SIP, mobile SDKs) we can save audio with much better quality without downsampling it to 8KHz. We chose 48 KHz as the base sample rate for HD audio recorder, since WebRTC/Opus can offer this quality, audio from endpoints with lower sample rate will be re-sampled.

It’s easy to use HD audio recording, just add hd_audio parameter in the recorder params:

  1. // Example for the record method of the Call class function
  2. call.record({hd_audio: true});
  3. // Example for the Recorder class
  4. require(Modules.Recorder);
  5. // ...
  6. var recorder = VoxEngine.createRecorder({hd_audio: true});
  7. call.sendMediaTo(recorder);

Feel free to start recording your calls in HD today, wideband audio conferencing is coming soon, stay tuned!

VoxImplant Instant Messaging and Web SDK upgrade

Full Featured Instant Messaging

IM

Our first release of instant messaging functionality offered limited number of functions for 1-to-1 communication, we’ve been working on instant messaging upgrade that enables group messaging, messaging history, contact list control and other capabilities for full featured IM system. IM/presence should be explicitly enabled in VoxImplant application settings before it’s available.

We are working on the tutorial explaining how to use new functionality and will update our simple messenger application on GitHub in the near future. Other features for IM we have in the roadmap: search in history, checking presence from VoxEngine scenarios, sending messages from VoxEngine scenarios and via HTTP API.

New Instant Messaging functionality is only available in WebRTC mode

Web SDK improvements

VoxImplant Web SDK now supports Temasys WebRTC plugin for IE/Safari. We are working on ORTC support in Edge, but a lot of companies still use IE/Safari and want to have access to VoxImplant functionality in these browsers.

Video calls support without access to local webcam is now possible, just set videoSupport to true and videoConstraints to false in config during the SDK initialization:

  1. VoxImplant.getInstance().init({
  2. micRequired: true,
  3. videoSupport: true,
  4. videoConstraints: false
  5. });

Now you can make/receive video calls, but your camera won’t be used, if you want to stream your video you can use Client.setVideoSettings or Call.setVideoSettings depending on the app logic.

Video Call Recording has arrived

meteor

It’s been awhile since we announced video calls support for VoxImplant. There are number of ways how developers can implement video calling with VoxImplant using Web/Mobile SDKs or SIP video phones as endpoints. If call is made in non-P2P mode then its media stream goes via our media servers and we can record it if required.

Call forking support has arrived

Call forking support means that developers can now forward calls from VoxImplant to VoxImplant application user that is connected to the cloud from different endpoints at the same time using the same login credentials. For example, let’s assume you have a SIP phone registered on the platform and Web or Mobile SDK connected and authorized on the platform, if you use callUser function in your VoxEngine scenario all the endpoints will ring at the same time. The first endpoint that will answer the call will be connected, while all other endpoints will stop ringing after that. Most likely you’ve seen this behaviour before when somebody called your Skype that was running on your PC and mobile at the same time.

Call Forking

This is very convenient for the case when your users are working with your app on different devices – you let them choose the device that will work better at the moment.

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Recent Posts

Feb 13, 2017 10:22
Authorization using tokens instead of passwords
Feb 03, 2017 01:45
Push Notifications for Android
Feb 03, 2017 01:45
Push Notifications for iOS
Jan 19, 2017 08:38
Speech-to-text: ASR
Jan 19, 2017 08:38
Speech-to-text: transcribing
Jan 19, 2017 08:37
Audio Recording
Dec 28, 2016 12:47
VoIP Push Notifications support for iOS SDK has arrived
Dec 14, 2016 02:00
New billing for video calls running via servers
Dec 07, 2016 02:29
Blind transfer support for SIP phones
Dec 02, 2016 06:18
Step-by-step call center tutorial part 8

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