What I have:
different video templates without logo
UI where users will select a template from that list
UI where users can upload their logotype, add mp3 file, text
What should be done:
new generated video based on this configuration.
What I found:
I can use ffmpeg and combine it all. But not sure how to make such animations with logo. Maybe there is existing gui.
I also found https://github.com/inlife/nexrender. But it works with Adobe After Effects and seems like what I need.
Example of result https://www.introbrand.com/logo-opening-mobiles.html
I'm not looking for the ready solution, just a few words - how to go, what to use..
This is absolutely new things for me, so if you could please suggest something or just tell me what's the best way - I'd appreciate this)
From what you described, I would say this is what you are looking for :https://creatomate.com/blog/video-rendering-with-nodejs-and-ffmpeg
I need to dynamically generate images containing a persons photo and various bits of 'status' information. I have some designs from our designer.
Looking at the designs the easiest way (for me) would be to generate that look using the tools I know - HTML, CSS, ReactJs etc.
But how can I essentially 'take a screenshot' (on the server) of what the browser would see and then save that out to a PNG?
Ideally I'd like to do this in nodejs but happy to consider c# or java or other languages if need be.
I know that nodejs will let you run a 'headless browser' for testing but what I want to do is essentially 'take a visual snapshot' of what those browsers 'see' and save to a png?
Keen to write this and run it on our server so looking for suggestions involving how I could code this up rather than an external service, if possible.
Thanks in advance!
I want to use Blockly to do some calculations, and then generate text files (as opposed to exporting code to JavaScript, Python, PHP, etc.)
I can’t see an obvious way to create my own blocks to do this in Blockly, so using AppInventor (Version: nb168), I got storing and retrieving files to work, in a crude test app on my Android tablet.
In AppInventor/Designer mode, clicking Storage/File creates a “Non-visible component for storing and retrieving files. Use this component to write or read files on your device.”
Then, in AppInventor/Blocks mode, clicking the “File1” icon gives access to 7 “file type blocks”, e.g. AppendToFile, Delete, ReadFrom, SaveFile, etc.
Is it possible to create similar “file type blocks” to use in Blockly Web?
I have limited programming knowledge, so would appreciate simple answers, please.
Thanks, Pete.
Andrew N Marshall from Google/Blockly has told me this:
"This is absolutely possible ...as long as you willing to work within the browser's security restrictions. The resulting files will be need to be manually "downloaded" one at a time, rather than written directly to the user's file system.
... I would start understanding what JavaScript functions are available to you. Attempt to construct a string and save it via a download dialog...
That means the "file" contents are really just a string in memory, a JavaScript variable. We have lots of "Text" blocks that can do a variety of operations on strings. If those are enough, you'll only need one new block to identify the string variable and initiate the download process.
Otherwise, you'll need to think about what blocks you want, and how they operate. They may operate on a specific variable in the JavaScript VM, not necessary exposed as a variable to Blockly.
Either way, you'll need to learn how to create a block and a Blockly app. We have a code lab that will walk you through all the steps. You'll learn how each block generates a string of code, and in your case, that code will be related to the download code I mentioned earlier."
So I'll press on - I just wanted to be sure my goal is actually achievable before I started.
Thanks, Pete.
I want too build a web application, and I am looking at the tools I will have to use.
I want to use a real time map
I'm a thinking about :
Tilemill to get .png in order to constitue the background of my maps
or get data from a webite in shp files to build layers for this in mapnik.
Mapnik Build layers with the data I want to add on my map.
Mapnik : Put layers together and generate a map.
TileStache : generate tiles for my application.
Openlayers : Display my map with tiles in a browser.
Once my map is displayed, I'd like to add interactivity. For example when you go over a line or a circle (a town/ an event), then it gives you the attributes of this object.
But the lines and circles will integrated dirctly to the mapnik map, so I need to add some javascript to make it dynamic and open a pop-up. How do I do this ? Using Openlayer javascript libraries or node.js.
What is your advice on the question/the way I want to use theese tools?
Thanks a lot!
I'm in a similar situation, so I don't know the answer, but from what I've been able to figure out I think you're on the right track.
I started off using the Mapbox approach, which simplifies things as long as your data is static. You use Tilemill not only to generate your PNG tiles (once you've used Carto to do some nice styling) but also to import your data sets.
TileMill can export your TileJSON and UTFGrid files with the PNG tiles all packaged up and ready to use. Mapbox will then host all that stuff for you, and you can use their mapbox.js library (an extension of Leaflet) to bring it all together in the browser, with full interactivity. Opening popups would be something you'd do in Javascript in the browser - and if you mean infoWindows (the overlay window that's associated with a map point) then that would be a call to the Leaflet API.
If you're happy to create your layers and import your data offline this approach seems to be really simple and powerful; Mapbox will even render out tiles using multiple layers overlaid - so for example you can see your circles on top of a satellite image, merged into a single PNG.
The problem really comes in when your data needs to be live and you can't therefore prepare it all ahead of time in TileMill. I'm still trying to figure this all out but it does seem as though a combination of TileStache and Mapnik would be able to serve you up the TileJSON, GeoJSON and UTFGrid files you'd need as well as the tiles themselves, in the way you've outlined in the question.
You might also want PostGIS and GeoDjango or similar behind the scenes in order to hold and manage your live data, respectively.
As I said, I'm still trying to actually get my full stack working so I can't vouch for this 100% but if your data is gathered upfront then I'd definitely recommend the TileMill route for simplicity's sake.
I hope that's a help!
How can we restrict a user from saving the page?
Please provide some tips to disable File->Save and View Source options
EDIT: Obviously it can't be done, and probably shouldn't be attempted. But possibly a more interesting variant on this question is how can we make is sufficiently hard for a user to save a page in a usable format such that it is not worth their while doing so? The question doesn't pose a value, but say we were protecting an article subscription site where the user is paying a few hundred dollars per annum for continued access to text.
Since the page has been sent to the client, there will always be a way to get that information. Trying to stop a user from doing this will only frustrate them.
The only way to have a user not be able to save a file is to not send it to them.
While the best answer is "Don't do this," there are ways to make it more difficult for them. And since the point of this site is actually answer the question even if it's bad, here is the best way:
First you'll need to have the page open in a new window where you turn off the address bar and toolbar and everything else. That will make it so the user can't easily get to the File menu at all. To do this you'll need a "splash" page that the user loads to and then when they click a link, it opens the popup that serves the main content of your page. Details on how to create popups without things like the toolbar are here:
http://blazonry.com/javascript/windows.php
Then you'll want to add some javascript to each page that prevents the user from right clicking. Here is one method:
http://javascript.about.com/library/blnoright.htm
Finally, if it's your Javascript code that you don't want to be seen, then obfuscating your code is a pretty effective way to do that. They can still see the code if they have much know-how, but the obfuscated code would be a gigantic pain to actually interpret. There are lots of obfuscators out there; here is a free web-based one:
http://www.javascriptobfuscator.com/
This is far from foolproof. It will stop all "casual" users, but any power user will probably be able to easily figure out a way around it. Still if the idea is to at least prevent a good majority of it then this should suffice.
Update for updated question:
To address your new expanded question, I would say the best way to accomplish what you're saying is to use a format that supports DRM. Adobe Acrobat would probably be the best choice because almost everyone has the reader installed. You can prevent PDF files from being saved to the computer so that they can only be loaded from the webpage by a logged in user. The user could still do a screen capture of the document itself which I don't believe is preventable (unless Adobe Reader has some security in place for this, which they might) but it should be sufficient security for most uses.
Don't do it.
Seriously, if the user can see the page in their browser they can see the source code and/or save it to their computer.
You are fighting a losing battle here.
What about the browser's cache? It can be saved from there.
What about a print screen? That could also save the page.
The only way to prevent a user from saving something is to not show it to them in the first place.
It's really a waste of time and resources to try and do this in html as any method you use can be trivially circumvented.
Instead I would use some other technology to display the data - you can never get around a screen capture. but if you're for instance displaying text and you want to make it hard for the use to save that text for use elsewhere then possible options include
PDF - which can disable save and print. There are extensions to most popular web languages that will write a pdf on the fly. Indeed you might be as well just to go down the DRM route with Adobe and embed a document
Flash - most probably via Flex which could be used to write a general-purpose app to display text and images. The advantage of Flash is that it's easier to set up links than pdf.
Or something else, a custom java applet, or even a vrml plugin and display the text in 3D!
In all cases you could display text against a disruptive background to make OCR more difficult, and images could be watermarked. However nothing is going to stop a determined and resourceful viewer, although you can possibly make it sufficiently hard that it's not worth their time.
The least you can do is... the content is generated dynamically by Javascript. In that way, they cannot simply save it. Of course, in FX, they can still view the generated code and then copy&paste. however, normally people cannot save the page.
It shouldn't be an issue, but if you really don't want a user from seeing your code (javascript, css or html) for some reason, than you could use some obfuscation tool which makes the code less readable.
Try javascript "encoding" and obfuscation.
Something like
if(document.location == 'mydomain.com') {
content = getAjax('mycontent.xml');
// content will hold something like 72, 94, 81, 99, ... - encoded ASCII codes
document.write(String.fromCharCode(content));
}
It will always be possible to save the page, but for non-technical guys it will be harder to make it work.
There are 2 protections
domain name
converting ASCII
It's only pseudocode, but I think you get the idea.
add these to code sets in script tag
document.addEventListener('contextmenu', function (e) {
e.preventDefault();
});
document.onkeydown = function (e) {
return false;
};
I'd like to add one more method which, imho, is hard to circumvent: Ctrl+S! (for me, Apple+S)
how can we make is sufficiently hard for a user to save a page in a usable format such that it is not worth their while doing so
Nothing hard: add on every page: "Personal property of John Stealer, company Zetabeta, paid with credit card 756890987654, billing address ..., subscription expires 12/20".
This is an "extended text format" that I just invented... it has an amazing property: though it looks like a regular text, user is much less willing to print it out and give to others...