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* An High Level API for transform medias.<br/>

* Based on FFMpeg / libav projects.

* <h2>Links</h2>

* <table style="border-width:0">

* <tr><td>github:</td><td>https://github.com/avTranscoder/avTranscoder</td></tr>

* <tr><td>openhub:</td><td>https://www.openhub.net/p/avTranscoder</td></tr>

* <tr><td>travis-ci:</td><td>https://travis-ci.org/avTranscoder/avTranscoder</td></tr>

* <tr><td>drone-io:</td><td>https://drone.io/github.com/avTranscoder/avTranscoder/latest</td></tr>

* <tr><td>coverity-scan:</td><td>https://scan.coverity.com/projects/2626</td></tr>

* </table>

* <h2>Authors</h2>

* <ul>

* <li>Marc-Antoine Arnaud</li>

* <li>Valentin Noël</li>

* <li>Clément Champetier</li>

* </ul>

*

* <h2>Main features</h2>

* The library is here to provide a simple managment of the Transform process.<br/>

* Main features attending are:

* <ul>

* <li>process each stream without different calls</li>

* <li>specify stream process before the begin of the process</li>

* <li>minimize process: only rewrap, or transcode without transformation if possible</li>

* <li>manage different length of stream (generate silence/black)</li>

* <li>overload of each sub-component for specific integration, like proprietary wrapper</li>

* <li>multi-languages usages (C++, Java, Python)</li>

* </ul>

*

* <h2>High Level API</h2>

* <h3>Transcoder</h3>

* The library provide the <b>Transcoder</b> class, which was the highest level of managment.<br/>

* This classe manage progress of process for each <b>StreamTranscoder</b>.<br/>

* Each <b>StreamTranscoder</b> definition can be added to the <b>Transcoder</b>.<br/>

* After declaration, the process() method can process file, which call processFrame() in loop.<br/>

*

* <h3>StreamTranscoder</h3>

* The <b>StreamTranscoder</b> will be here to abstract call for different case as:

* <ul>

* <li>simple rewrap stream</li>

* <li>transcode stream (decoding, transform and encoding)</li>

* <li>encode from dummy (silence/black or external input source), without decoding step</li>

* </ul>

* Each <b>StreamTranscoder</b> is able to process a frame, and in background process a rewrap or the transcode process.<br/>

*

* <h2>Lowest API</h2>

* <h3>InputFile</h3>

* This object manage the input media, providing the analisys methods to get metadatas on wrapper and each streams.<br/>

* It also the entry point to get the <b>InputStream</b> which was the coded stream.<br/>

* <h3>OutputFile</h3>

* The equivalent to the <b>InputFile</b> is the <b>OutputFile</b>. Each output stream require a decalaration, needed to wrote headers of files (wrote during the beginWrap() call).<br/>

* As the <b>InputFile</b> provide the <b>InputStream</b> to describe stream, the <b>OutputFile</b> as his <b>OutputStream</b> to put coded stream into the output file.<br/>

* Using one <b>InputStream</b> and one <b>OutputStream</b>, each <b>DataStream</b> can be passed to provide a rewrap process.<br/>

*

* <h3>InputEssence</h3>

* The <b>InputEssence</b> provide every time an image, from a coded stream or from an external buffer.<br/>

* It's allow the possiblity to generate silence or black stream, or also switch between the coded stream and a factice (to complete stream with different durations).<br/>

* The switch between source was managed inside the <b>StreamTranscoder</b> class.

*

* <h3>OutputEssence</h3>

* As the <b>InputEssence</b> can decode the stream, the <b>OutputEssence</b> will encode our images to provide the coded stream.<br/>

* It's the encoder cofigured with some <b>Profile</b>.

* <h3>EssenceTransform</h3>

* For adapt some images to the output format, some transformation can be done.<br/>

* This step will only provide pixel/sample transformation (point to point transform). No resize, resampling can be applyed in this step.

*

* <h2>Low API</h2>

* Each component of the Lowest API call method present in the libav/ffmpeg API. You can depend on one of these project.<br/>

* Newest versions of libav/ffmpeg are recommended.<br/>

* <br/>

* <br/>

*