Hi everyone,
Situation: I want AWS to host a HLS link which I can change at a whim (so, not hard coded) to guide devices like the Roku, Fire TV, Alexa, Apple TV, where the HLS link is. Currently my programs tell devices to go to Ooyala then Ooyala tells the device where to get HLS link.
So, I want to cut out Ooyala and just use AWS to tell devices where to get the HLS link (at CDN).
Problem: Does anyone know if it is possible or another solution? if so, what do I need and what to research? I was thinking something along the lines of writing a script and a static IP.
If you have an idea, please label a few steps for me, so I can get an idea the possibilities!
Thank you,
Jackson
I've built many apps on the devices you've listed. Some clients have decided to use an external config (json or xml) that each of the apps load on startup. Ultimately it is the equivalent of an API response. You can employ some cache busting during the request for the file to make sure you always get the latest. You can choose to host that file anywhere you want...
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Successfully able to upload the SCORM package zip and unzip in S3 bucket using drupal 8.
While trying to read the SCORM files in the extracted data folder we got the error message like
"ERROR – unable to acquire LMS API, content may not play properly and results may not be recorded. Please contact technical support"
I checked the access stuff all are in public only
Can anyone tell me where i missed
image
That content sounds like its setup to look for the API or API_1484_11 (SCORM API's for 1.2 and 2004) and pop up an alert.
With a runtime API present that alert would go away. Your next question - "How do I expose a runtime API?" the answer is normally you hand roll one, or look for a Runtime API paid or otherwise.
Something like https://github.com/cybercussion/SCOBot/blob/master/QUnit-Tests/js/scorm/SCOBot_API_1484_11.js might get you started if your looking for free.
If you plan to build a LMS you may want to look into paid options.
I am working on a project or application built in Windows using C++. I would like to seek help on any idea or approach or existing libraries that implements geolocation/geocoding, since I want to limit may C++ Windows application to run on certain region or country only.
Any suggestions, comments will be a great help. Thanks.
It won't be possible to prevent an application from running locally in certain regions. A user can always disconnect from the internet and then you'll have no idea where they're located.
What you could do is to have some of your app logic run in a server, then make requests to your server from the local C++ app. Then you can geolocate based on the IP address of the request, often a standard feature in cloud platforms.
If you do want to explore getting someone's location, you can look at Apple's Core Location or Microsoft's Geolocation namespace.
I am trying to stream a video with HLSv4. I am using AWS Elastic Transcoder and S3 to convert the original file (eg. *.avi or *.mp4) to HLSv4.
Transcoding is successful, with several *.ts and *.aac (with accompanying *.m3u8 playlist files for each media file) and a master *.m3u8 playlist file linking to the media-file specific playlist files. I feel fairly comfortable everything is in order here.
Now the trouble: This is a membership site and I would like to avoid making every video file public. The way to do this typically with S3 is to generate temporary keys server-side which you can append to the URL. Trouble is, that changes the URLs to the media files and their playlists, so the existing *.m3u8 playlists (which provide references to the other playlists and media) do not contain these keys.
One option which occurred to me would be to generate these playlists on the fly as they are just text files. The obvious trouble is overhead, it seems hacky, and these posts were discouraging: https://forums.aws.amazon.com/message.jspa?messageID=529189, https://forums.aws.amazon.com/message.jspa?messageID=508365
After spending some time on this, I feel like I'm going around in circles and there doesn't seem to be a super clear explanation anywhere for how to do this.
So as of September 2015, what is the best way to use AWS Elastic Transcoder and S3 to stream HLSv4 without making your content public? Any help is greatly appreciated!
EDIT: Reposting my comment below with formatting...
Thank you for your reply, it's very helpful
The plan that's forming in my head is to keep the converted ts and aac files on S3 but generate the 6-8 m3u8 files + master playlist and serve them directly from app server So user hits "Play" page and jwplayer gets master playlist from app server (eg "/play/12/"). Server side, this loads the m3u8 files from s3 into memory and searches and replaces the media specific m3u8 links to point to S3 with a freshly generated URL token
So user-->jwplayer-->local master m3u8 (verify auth server side)-->local media m3u8s (verify auth server side)-->s3 media files (accessed with signed URLs and temporary tokens)
Do you see any issues with this approach? Such as "you can't reference external media from a playlist" or something similarly catch 22-ish?
Dynamically generated playlists is one way to go. I actually implemented something like this as a Nginx module and it works very fast, though it's written in C and compiled and not PHP.
The person in your first link is more likely to have issues because of his/hers 1s chunk duration. This adds a lot of requests and overhead, the value recommended by Apple is 10s.
There are solutions like HLS encrypted with AES-128 (supported on the Elastic Transcoder), which also adds overhead if you do it on the-fly, and HLS with DRM like PHLS/Primetime which will most likely get you into a lot of trouble on the client-side.
There seems to be a way to do it with Amazon CloudFront. Please note that I haven't tried it personally and you need to check if it works on Android/iOS.
The idea is to use Signed Cookies instead of Signed URLs. They were apparently introduced in March 2015. The linked blog entry even uses HLS as an example.
Instead of dynamic URLs you send a Set-Cookie header after you authenticate the user. The cookie (hopefully) gets passed around with every request (playlist and segments) and CloudFront decides whether to allow the access to your S3 bucket or not:
You can find the documentation here:
http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/PrivateContent.html
I have a use case that requires offline access to google earth. I know that google earth enterprise offers a disconnected product, however we may not have access to that product and/or google earth enterprise is prohibitively expensive at $25K for a dev license.
I would prefer to use the google earth plugin since I am building an application and would like to use the JS api. Is it possible to host the google earth plugin on my own disconnected server? We would use google earth connected to a standalone offline WMS server for access to imagery.
said another way, can I host the plugin and corresponding javascript on my own server?
I do not know if i understand well your problem but i can explain you waht I'm currently working on.
Im my current application with google earth plugin js api, I'm able to start the plugin even if offline. But one requirement is to have cached data.
If you have cached data and if you start the plugin offline, then zooming to a level with higher resolution that the one you have in your cached data will have no effect (imagery will not be update to higher resolution)
but depending on what you really need, yes , you can start the plugin offline
This is not really answering your original question but if you are interested, just tell me :-)
I tried to cache Google Earth with a proxy server but I couldn't.
Furthermore I think the api is validated every time it loads against Google Servers and doesn't allow offline use
It's some monthes now since I have worked with this.
I'll try to explain with what i can remember :-)
in the html where i have my plug-in, i have removed:
"script type="text/javascript" src="https://www.google.com/jsapi">
but i have saved locally this jsapi.js file. I also saved locally loader_1-008.js
then, im my code (c++, Qt) I'm using evaluateJavaScript(Qstring source) twice
where source is the text read from my 2 .js files
These 2 evaluateJavaScript calls need to be done before loading my html (the one with the plugin)
in my QWebView
I can not remmeber much more but I hope this can start to help you
I have to upload my django project to a shared hosting provider.
How can I encrypt my code?
I want to hide my code on the server.
Thanks :)
You can't. You could upload .pyc files I suppose, but they are completely and utterly trivial to decompile.
Who are you trying to conceal it from? If it's other users on the shared system, then make sure you have directory permissions properly restricted to your user. If it's the shared hosting provider itself, then there's not much you can do since obfuscation won't buy you all that much; spend some time to find a reputable hosting provider you can trust.
If you really want to hide your code, you have to build custom python interpreter that uses different opcodes (in python bytecode). Then the server only has your hacked binary and pyc's that are not trivial to decode. You can add encryption on top of that, or at least sign your code so that your binary is not that easy to investigate.
Another possibility is to never have your code on disk, only keep it in RAM. You could start your server process via e.g. execnet.