Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 3 years ago.
Improve this question
We prefer to use web based apps with jquery.mobile as they can get upgraded on demand and just less hassle. Is there an api that can be called by ajax from our web based app to use the card.io service?
I'm afraid not. To make for a responsive, reliable user experience, card.io actually examines many video frames to select good quality ones for processing. We also process them client-side, because with large images the latency from the network round trip can be significant.
This all requires non-trivial client-side work. There are two immediate problems to porting to html: (1) performance and (2) camera APIs.
Performance
Javascript interpreters are fast, but when doing image processing, native code is a huge help. (card.io uses the GPU, the ARM vector co-processor, and drops down to assembly in a few places.) Access to the GPU via Canvas will help, but not all algorithms are amenable to GPU treatment. Performance will continue to become less critical over time, but it's a major challenge right now.
Camera APIs
Camera API support is very uneven across mobile browsers, and (to my knowledge, at time of writing), none of the major mobile browsers (Mobile Safari, Chrome, Firefox) provide full realtime video access with enough control over resolution to make processing the stream feasible. Again, hopefully this will change.
I hold out hope that there will someday be a mobile web version of card.io, but it's definitely not available now (although we do have a Phone Gap plugin.)
Related
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 7 years ago.
Improve this question
My team and I would like to develop a project that incorporates an Android, iOS and web app. Scalability and big throughput potential is a key feature. We have started to work with Parse.com, and it provides exactly what we're looking for - except for the prohibitive expensiveness of scaling and the absurd limits on queries and requests/second. What are some alternatives to Parse in this sense? We most likely do not need any complex database actions and limited cloud processing.
Thanks in advance.
Perhaps it's time us Parse users go to the big boy of cloud services: https://aws.amazon.com/mobile/
Parse is an outstanding option for getting up and running quickly. Don't underestimate the value in being able to rapidly bring an idea to market.
Long term, potential competitors to Parse (e.g. Firebase, PubNub) will not provide meaningful savings when operating at scale. If you are concerned about that you will want to look into developing your own backend services and running them on infrastructure like AWS (Amazon Web Services). At a high level, Parse uses MongoDB for its core database and is entirely hosted using AWS. AWS offers tons of services for managing data, performing computations, load balancing, and so on. They also offer AWS API Gateway which allows you to access AWS resources and automatically creates client SDKs for you.
As a general rule of thumb, it's much better to focus on building the best possible user experience than to focus too much on scalability. By and large, issues of scalability rarely come into play because most apps fail. Not saying that to be discouraging — just something to keep in mind and prevent you from falling into the trap of over-engineering at the cost of time :)
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 7 years ago.
Improve this question
I have a total of 5 Play applications that I have been working on my spare time. They are small projects, serious enough to be published to the world yet not enough to invest large sums of money. I would anticipate a maximum of 10k visits per month, they are read only (information comes out of a database, nothing comes in).
What are some good inexpensive options to deploy these 5 websites? They will have 5 different domain names.
Thanks,
You'll need to pay for the 5 domains regardless of the option.
Note: I can only speak for GAE, I have no experience with AWS.
In GAE you might be able to stay within the free quotas:
https://cloud.google.com/appengine/docs/quotas
Free quotas are higher for a paid account which might be overall more cost-effective than a non-paid account.
If the apps share the DB (not directly possible in GAE at this time, see is it possible to share a datastore between multiple GAE applications and maybe related Q&As) I'd recommend making them just modules of a single app instead of separate apps. All domains would be mapped to that single app and routed to separate modules using a dispatch file.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 5 years ago.
Improve this question
I'm looking for a graphic API for embedded systems. With "graphic", I mean an API which is able to draw lines, fill areas, blit bitmaps, etc. I need something that is written in pure C (no C++).
With "embedded systems", I'm thinking of small systems where Linux is too big to run. So I would appreciate a library which is not too concerned with file systems, and OS-level access, but just exposes the graphic primitives with a C interface, and draws in memory buffers.
Any suggestion?
Swell Software, offers C/PEG.
Here's an excerpt from the C/PEG product page:
C/PEG is a complete graphics solution for embedded developers written entirely in ANSI C. C/PEG not only provides optimized graphics primitives, text and bitmap drawing; it also supports higher level graphic objects to give the developer a full tool set for rapid application development
We've used EasyGui - http://www.easygui.com/ - for the start of a project (it's currently on hold).
From the bit I've done it seems quite good. You design up the UI on a PC then generate the C code which makes it all happen.
One thing I like is that if you structure your app properly the code that runs the UI can be separate to the actual UI - ie it could be reused on a different screen resolution/colours/etc. We've made up a modular system where we can reuse bits in different projects as long as we follow the appropriate conventions for button numbers, etc
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 3 years ago.
Improve this question
Hej,
I recently read a lot of papers from Lamport, Fischer, Lynch, Brewer to get a feeling for their perspective of distributed systems.
I was wondering, what are current open distributed computing research questions/topics? Many areas from databases, communication, fault-tolerance, number crunching, etc. seem to be tackled and in quite solid hands.
What do you think are new areas, maybe someone did think of in the past but rendered it impossible and now it becomes possible? A topic like graph algorithms/databases/analysis?
I would also appreciate if anyone can give a some hints of must-read papers about distributed systems. They can also be a more "sci-fi" to just stay inspired.
Something I have had a big interest in is the potential for using cloud computing / distributed systems to run 3D software, such as you could set up essentially a virtual production studio "in the cloud", as it stands now the cloud providers offer only very basic rudimentary graphics support as their hardware is not equipped with anything approaching high end graphics cards..
I think in the future this type of platform could be also used for online games and things of that nature, such as to take away the need for local computing power, with the increase in broadband speeds (some places in the U.S. now have access to fiberoptic lines with 50+ MB per second) this is becoming an increasing possibility in the near future.
I don't play computer games myself and just used to do some 3D design / animation work but I look at it more from a business perspective and think that this has a lot of potential as, for example, someone with just a basic notebook laptop could eventually be able to use a remote connection to a distributed computing network to play a CPU intensive game (likely through a subscription based set up as this obviously would be taxing on the company providing such a game service as they would be providing all the computing power).
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 6 years ago.
Improve this question
What video analytics tools shall I use?
I need to track:
. Start / Stop / Pause, etc
. Bandwidth
. Bytes downloaded
among others.
Right now, due to current technology, there aren't any tracking tools out there that reliably track the various video players out there. Most embedded video players are encapsulated and offer little to nothing that javascript can listen for.
Currently the best way to the sort of metrics you are asking for is to put your video inside a flash object and hook actionscript to whatever events you want to track (like clicks on the start, stop, etc...). When the event happens, actionscript would then make a call to a javascript function on the page that triggers whatever variables you want to track, passing whatever value for the event.
The actual coding would vary depending on what version of actionscript you are using and what tracking tool you are using, but it's the same principle regardless.
Omniture SiteCatalyst currently offers an actionscript module built for this sort of thing, so you don't have to build it from the ground up if you go with them (and it's actually done completely within actionscript so you don't even need to throw javascript into the mix).
But building it from the ground up with other tools like Google Analytics or Yahoo Web Analytics is still fairly easy, assuming you have the access and resources to build your movie within a flash object.
Longtail Video offers a Google Analytics Pro plugin for their JW Player. Version 2 supports analytics tracking on HTML5 and Flash videos.