I'm working to publish the meta information for a SaaS platform emitting live events, video broadcasts live shopping sessions.
In order to take advantage of Google search enhancements for each upcoming event, I selected the schema object Event and generate the JSON-D info on the page. However, when the event starts, technically it becomes a video stream, and as I understand from the google dev docs, in order to be eligible for display with a LIVE badge I think I need to expose the JSON-D info as a VideoObject with the selected BroadcastEvent properties nested (publication.startDate, publication.endDate, publication.isLiveBroadcast).
I'm trying these approaches:
Published as Event, turning into Video with nested BroadcastEvent properties once started live.
Published as a BroadcastEvent all the time. publication.isLiveBroadcast change to true once started.
Published as BroadcastEvent, then turning into Video with nested BroadcastEvent properties once started.
Option 2 seems the better choice to me, the only problem I have with the BroadcastEvent object is a property named broadcastOfEvent, because I'm not sure if it can be null (which will be my case if selected because this page is referring to the event that is a broadcast by itself).
In your experience, which of those metadata changes could be noticed fast enough by the crawling engine and what is the recommended way to go in this scenario?
Related
I want to develop a Sonos Controller that is capable of:
Playing a playlist or album now, or next (after currently playing song) or by appending it to the end of the queue.
However I can't see a way to control how the playlist is added to a queue. The documentation at https://developer.sonos.com/reference/control-api/playlists/loadplaylist/ doesn't suggest that it is possible,but there is a reference to the queue in the description for the shuffle playmode "Play the tracks in the queue in a randomly shuffled order."
There is documentation for "Cloud Queues" but this seems to be targeted at Music Services.
Is it possible to create a Cloud Queue that just holds references to tracks in other services?
Not that I would really want to implement that, I would rather just access the queue that is on the players.
The Sonos Control API does not currently allow for direct access to the player queue. Third party integrations can get content on to the queue via the playlists and favorites namespaces, but they can't touch the queue directly.
As you noted, the Cloud Queue API is intended for Content Partners. It is not directly possible to reference third party content in personal CQs, there are authentication issues involved.
This squares with my user experience of the Sonos queue being very basic and unintelligent. There have been a number of times I've been forced to clear the queue and start over, rather than being able to reorder items, etc. FWIW, the closest thing I've seen in their documentation to what it sounds like you're looking for, is under a different API. Sonos Music API > reorderContainer as documented here: https://developer.sonos.com/reference/sonos-music-api/reordercontainer/
I don't see any similar functionality documented in the Sonos Cloud Queue API. With regard to random order, I believe that's on playback, not anything that modifies the queue.
I was wondering how the services like http://www.inspectlet.com/ does store the video sessions. By the looks I don't think it's a webRTC implementation. What i was able to figure out that there is active express socket which is making communication but in that case they will have to store the page and track all the events from DOM. Just wanted to confirm that this is the approach they are following.
Looking at the event listeners on the page, it looks like there are a lot of bindings. For example, the <body> has scroll, keyup, and change events bound to a function. I'm sure it also has mousemove, mouseclick, etc. All of this is likely stored in a Javascript variable (object, probably) and then AJAXed every so often to http://hn.inspectlet.com/adddata with the data parameters. Here is a sample of what is being sent:
http://hn.inspectlet.com/adddata?d=mr,212941,46,337,46,1277)mr,213248,163,498,163,1438)mr,213560,144,567,144,1507)mr,213873,138,240,138,1180)mr,214188,169,184,169,1124)mr,214504,158,520,158,1460)mr,214816,231,487,231,1427)mr,215130,329,197,329,1137)mr,215444,894,289,894,1229)mr,215755,903,295,903,735)s,215755,440,0)&w=259769975&r=494850609&sd=1707&sid=1660474937&pad=3&dn=dn&fadd=false&oid=99731212&lpt=212629
As suggested in Adam's answer, they track many events in the page and send them either via a websocket or post/get request (XHR) to their servers.
I am not sure what inspectlet does specifically, but in general, such a solution will need to follow the below general steps:
When the page is fully loaded (hook on DOMContentLoaded probably) they will send the page data to the server. Then they also hook on MutationObserver in order to track all changes to the DOM in the page, so when something changes dynamically, the tracking script can 'record' it and send it to the server.
The SaaS application in turn, will have a player that will parse all this raw data and then play it back, this will usually require using some virtual file system for assests (images, css, scripts) and handling js scripts to not post back again (replay xhr will have bad results for tracked websites) but play back the mutations as they were captured (recorded)
In regards of data HTML pages compress really well, especially when you can make assumptions about the data (since you know its html) - so yes, they actually cache a lot (similar to what google does in that regards, but google does it for the entire web, not just 'customers')
The DOM Mutations will need to be stored as well. This is up to the algorithm, it can either be stored as plain text or using a smarter data model, storing them in plain text is obviously not the cost effective solution.
The above is an abstraction, there are many edge cases to handle in order to implement such a solution as well as a lot of mathematical and algorithmic thinking in regards of heatmaps to make them accurate.
So after a long search was able to find a new promising solution on the block, which solves all the complex parts in building such service. It is still under development but it solves the problem. Below is the link to it,
https://www.rrweb.io/
https://github.com/rrweb-io/rrweb
i want to develop a site where user selects various videos and site will render a single video containing all videos in a pre-built template.
what would be the way to go about this (in order to create the movie dynamically from site) ?
what would be the server side framework to use ?
can i use after-effects and have site use it to generate such templates (optional - as i have a friend who works with after effects and can create templates) ?
as i am fairly new to the field any additional information is welcomed.
I'm no expert, but I'm pretty sure you can't do what you described.
Rendering a video consumes huge resources (really huge), so a server park that could
handle this is just not worth it.
However, what you can do is to play the selected videos consecutively. That way, no rendering is necessary.
Also, forget about After Effects, for the same reasons described above.
You can achieve what you want by using a new plugin for After Effects called Templater Bot. From Dataclay's site:
Templater Bot is an enterprise solution for custom video on demand. It works as an automated system. Use it to periodically check for incoming data, pull new data in, and render video as a background process. Or use the command line interface to push data in to create new renders. Once your AE project is prepared, use Bot to customize and render it without operating the After Effects user interface. Developers can create front end applications, such as web or mobile apps, that feed data into Templater's data source, offering a collaborative, custom video content creation solution.
I have a live tile working which updates how many users are online and how many lobbies are open within the app. This begins updating when my app loses its visibility (no point it updating the live tile whilst the app is running), but I want it to update when I first turn the computer on.
I have had a look around and mentions of making the app a lock screen app have popped up but that is all, no explanation how to do it.
Does anyone know how to do this and provide a nice little explanation or link of how to do so?
Many thanks,
Kevin
You should use push notifications for this kind of behaviour. This msdn link has more info:-
Using tile notifications
Choosing the right notification method to update your tile
There are several mechanisms which can be used to update a live tile:
Local API calls
One-time scheduled notifications, using local content
Push notifications, sent from a cloud server
Periodic notifications, which pull information from a cloud server at a fixed time interval
The choice of which mechanism to use largely depends on the content you want to show and how frequently that content should be updated. The majority of apps will probably use a local API call to update the tile when the app is launched or the state changes within the app. This makes sure that the tile is up-to-date when it launches and exits. The choice of using local, push, scheduled, or polling notifications, alone or in some combination, completely depends upon the app. For example, a game can use local API calls to update the tile when a new high score is reached by the player. At the same time, that same game app could use push notifications to send that same user new high scores achieved by their friends.
You're right with the assumption that you require a lock screen capability to be able to run background tasks without your app being started once. The main process would be to extract the part of your application that gets the data into a background task that is probably triggered by a timer and write some code to be on the lock screen.
When I first encountered that restriction I was kind of surprised, but in terms of battery performance this design decision makes sense: Only consume battery power if the data is absolutely worth it. If it's worth, it is also of interest having it on the lock screen.
On MSDN is a good overview about lock screen along with further reading links. It's much better than what I could type in here. Come back with problems related the implementation (which actually even better fits the purpose of SO). This blog might be useful, too.
WHATWG has announced recently that it's possible now to get notified about the changes in some sections of specifications (more on the way). Is there a similar mechanism for W3C specs? Is it possible to get notified of updates by email or through a feed?
If the specs are posted online (and I have to assume that w3c specs are), then why not use a service like http://www.changedetection.com/ ?
There are several similar services which will notify you whenever any web page is changed and you can even limit the checking ot certain parts of the page (to avoid changing banner headlines, for instance).
hope this helps
Many of the W3C specs are managed by version controlling systems like Git or Mercurial. Apart from being able to actually clone the repository and regularly pull in the changes, one can simply subscribe to the updates in RSS or Atom format. Every spec has it's own channel, but here's the page that seemingly lists them all, along with corresponding links - to repositories, zip/tarballs or RSS/Atom channels.
https://dvcs.w3.org/hg/
While this is definitely great. Some of the specifications are still off the list like File API.