Video Stream

The video widget allows you to display static, live, and streaming video(s) contained within a M3U8 playlist, or an MP4 file. An M3U8 playlist is a Unicode version of an M3U playlist. A URL to a YouTube video will not work.

Datastream

Select or create a datastream of data type string.

At the moment Blynk doesn't provide streaming servers. So you can either stream directly from the camera, use third-party services, or host your own streaming server (on Raspberry Pi for example).

Widget Controls

The video widget has the following controls:

1. Play / Pause: Press the play button to start or continue the video. Press the pause button to stop the video.

2. Frame Sider: Grab and slide it to position the video to a particular frame.

3. Full Screen: View the video in full screen.

How to change the video URL property

You can change the URL from your hardware, or via an HTTP API by using the property name ‘url’.

Blynk.setProperty(V1, "url", "http://my_new_video_url");

https://{server_address}/external/api/update/property?token={your 32 char token}&pin=V1&url={http://my_new_video_url}

Change Widget Properties

You can change certain properties of the Widget from your hardware. For that, use this command:

Blynk.setProperty(vPin, "widgetProperty", "propertyValue"); 

Where:

• vPin is: virtual pin number the widget is assigned to

• widgetProperty: property you want to change

• propertyValue: value of the property you want to change

Don't put Blynk.setProperty()into the void loop() as it can cause a flood of messages and your hardware will be disconnected. Send such updates only when necessary, or use timers.

Properties you can change

You can change the properties url, isDisabled, isHidden of the widget from your hardware, or via an HTTP API. The URL must be encoded, so spaces in labels must be replaced with %20.

Change URL

Blynk.setProperty(V1, "url", "http://my_new_video_url");

Disable/Enable

Widget will be greyed out on UI and users won't be able to tap on it.

Blynk.setProperty(V1, "isDisabled", true);

Show/Hide

Widget will be hidden from dashboard. Design your UI so that it doesn't look weird when there is no widget.

Blynk.setProperty(V1, "isHidden", true);

Change widget properties via HTTPs API

Updates the Datastream Property and all assigned Widgets

GET https://{server_address}/external/api/update/property?token={your 32 char token}&pin={your vPin}&{property}={value}

The endpoint allows you to update the Datastream Property value via GET request. All widgets (both web and mobile) that are assigned to this datastream will inherit this property. The Datastream Property is persistent and will be stored forever until you change it with another value. In order to clear the property you need to clear the device data in device actions menu.

Example:

https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&url=http%3A%2F%2Fcommondatastorage.googleapis.com%2Fgtv-videos-bucket%2Fsample%2FElephantsDream.mp4

https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&isDisabled=true

Path Parameters

Name	Type	Description
{server address}*	string	Get from the bottom right of your Blynk console. More information.

Query Parameters

Name	Type	Description
token*	string	Device auth token from Device info
pin*	string	The datastream virtual pin (should start with "v")
{property}	string	The property of the widget you want to update: label, color, isDisabled, isHidden
url	string	the url of the video that has to be played, urlencoded
isDisabled	string	true or false
isHidden	string	true or false

200 Success

400 Could not find a device token

{"error":{"message":"Invalid token."}}

Sync to the latest known state

You can update your hardware to the latest datastream value from Blynk.Cloud after your hardware went offline, and then came online again. Use Blynk.syncVirtual() to update a single virtual pin, or Blynk.syncAll() to update all virtual pins. See State Syncing for more details.

BLYNK_CONNECTED() { 
  // Called when hardware is connected to Blynk.Cloud  

  // get the latest value for V1
  Blynk.syncVirtual(V1); 

  // Request Blynk server to re-send latest values for all pins
  Blynk.syncAll()
}