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Opening a media file from the local file system. AVFormatContext *formatContext; // Open the file if(avformat_open_file(&formatContext, "path/to/file.ogg", NULL, NULL) < 0){ // Error opening file } // Do something with the file // Free resources avformat_close_inpu...

Formats contain one or more encoded and muxed streams. We usually read these in chunks, which are often called frames (though in certain cases, FFmpeg refers exclusively to decoded, raw media chunks as frames, and encoded chunks as packets, which may be confusing). To read a single frame from a form...

The API call avio_alloc_context, which sets up a custom IO context, takes in a pointer to a Read function. If you are reading from an IStream, you can use the following: /** * Reads from an IStream into FFmpeg. * * @param ptr A pointer to the user-defined IO data structure. * @param b...

The API call avio_alloc_context, which sets up a custom IO context, takes in a pointer to a Seek function. If you are reading from an IStream, you can use the following: /** * Seeks to a given position on an IStream. * * @param ptr A pointer to the user-defined IO data structure. * @pa...

Media stream containers usually have a several streams, such as a video stream and an audio stream. For example, you can get the audio stream using the following: // A Format Context - see Reading Data for more info AVFormatContext *formatContext; // Inspect packets of stream to determine prope...

Circle.yml machine: python: # Python version to use - Selenium requires python 3.0 and above version: pypy-3.6.0 dependencies: pre: # Install pip packages - pip install selenium - pip install unittest test: override: # Bash command to run main....

You can use UILocalNotification, old APIs also works fine with iOS10, but we had better use the APIs in the User Notifications framework instead. There are also some new features, you can only use with iOS10 User Notifications framework. This also happens to Remote Notification, for more informatio...

In this XML file, we are specifying the servlet class DispatcherServlet that acts as the front controller in Spring Web MVC. All the incoming request for the HTML file will be forwarded to the DispatcherServlet. <?xml version="1.0" encoding="UTF-8"?> <web-app version...

Imagine that you need sort records by lowest value of either one of two columns. Some databases could use a non-aggregated MIN() or LEAST() function for this (... ORDER BY MIN(Date1, Date2)), but in standard SQL, you have to use a CASE expression. The CASE expression in the query below looks at th...

Right-click on the Toolbox, then click "Choose Items". Select the COM Components tab, and then check Windows Media Player. axWindowsMediaPlayer will be added to Toolbox. Select this checkbox to use axWindowsMediaPlayer Then you can use axWindowsMediaPlayer :)

Lets say we want to build a paginated list of products, where the number of the page is passed as a query string parameter. For instance, to fetch the 3rd page, you'd go to: http://example.com/products?page=3 The raw HTTP request would look something like this: GET /products?page=3 HTTP/1.1 Ho...

PHP exposes a number of so-called global variables which contain information about the HTTP request, such as $_POST, $_GET, $_FILES, $_SESSION, etc. The Request class contains a static createFromGlobals() method in order to instantiate a request object based on these variables: use Symfony\Componen...

To get the contents of a form that is submitted with method="post", use the post property: $name = $request->request->get('name');

$id = $request->cookies->get('PHPSESSID'); This will return the value of the 'PHPSESSID' cookie sent by the browser.

Installation or Setup Slim framework Install Composer Open cmd Go to Root directory of your Project Folder and Run Following Command. composer require slim/slim "^3.0" Now you will have vendor directory in your project Next Create Index.php in root folder and add following co...

Launch screen is a screen which appears while launching app and lasts till first screen of app appears. Learn more about Launch Screen and guidelines here. Similar to AppIcons we have to mention in project settings about using image assets for launch screen image. By default project settings are ...

In swift we can use both print() and NSLog() functions to print something on Xcode console. But there are lot of differences in print() and NSLog() functions, such as: 1 TimeStamp: NSLog() will print timestamp along with the string we passed to it, but print() will not print timestamp. e.g. let ...

Sympy is made for symbolic math, so let's have a look at some basic integration and differentiation. from sympy import symbols, sqrt, exp, diff, integrate, pprint x, y = symbols(...

There are various types of inheritance and code reuse in Twig: Include The main goal is code reuse. Consider using header.html.twig & footer.html.twig inside base.html.twig as an example. header.html.twig <nav> <div>Homepage</div> <div>About</div> </...

Using the command git tag lists out all available tags: $ git tag <output follows> v0.1 v1.3 Note: the tags are output in an alphabetical order. One may also search for available tags: $ git tag -l "v1.8.5*" <output follows> v1.8.5 v1.8.5-rc0 v1.8.5-rc1 v1.8.5...