# Transcoding & Processing

OvenMediaEngine supports Live Transcoding for Adaptive Bitrate(ABR) streaming and protocol compatibility.  Each protocol supports different codecs, and ABR needs to change resolution and bitrate in different ways.  Using **OutputProfile**, codecs, resolutions, and bitrates can be converted, and ABR can be configured as a variety of sets using a **Playlist**.

This document explains how to configure encoding settings, set up playlists.

<figure><img src="https://content.gitbook.com/content/xo7moYXTh3yBG01Dy49w/blobs/NN4SMpjAA3bfMqSU2Cdf/image.png" alt=""><figcaption></figcaption></figure>

<p align="center"><sub><mark style="color:$info;">Transcoding and Adaptive Streaming Architecture</mark></sub></p>

### Transcoding

This section explains how to define output streams, change the codec, bitrate, resolution, frame rate, sample rate, and channels for video/audio, as well as how to use the bypass method.

{% content-ref url="transcoding-and-processing/transcoding" %}
[transcoding](https://ovenmediaengine-enterprise.gitbook.io/guide/features/transcoding-and-processing/transcoding)
{% endcontent-ref %}

### Adaptive Bitrate (ABR) Stream

This section explains how to use a Playlist to assemble ABR streams by selecting tracks encoded in various qualities.

{% content-ref url="transcoding-and-processing/abr" %}
[abr](https://ovenmediaengine-enterprise.gitbook.io/guide/features/transcoding-and-processing/abr)
{% endcontent-ref %}

### TranscodeWebhook

The transcoding webhook feature is used when dynamic changes to encoding and ABR configuration are needed based on the type or quality of the input stream.

{% content-ref url="transcoding-and-processing/transcodewebhook" %}
[transcodewebhook](https://ovenmediaengine-enterprise.gitbook.io/guide/features/transcoding-and-processing/transcodewebhook)
{% endcontent-ref %}

### Support Codecs

These are the types of supported decoding and encoding codecs.

{% tabs %}
{% tab title="Decoding Codecs" %}
**Video**&#x20;

* VP8, H.264, H.265

**Audio**&#x20;

* AAC, Opus, MP3
  {% endtab %}

{% tab title="Encoding Codecs" %}
**Video**

* VP8, H.264, H.265

**Audio**

* AAC, Opus

**Image**&#x20;

* &#x20;Jpeg, Png, WebP
  {% endtab %}
  {% endtabs %}

### **Hardware accelerators**

These are the types of hardware accelerators officially supported.

* NVIDIA GPU
* Xilinx Alveo U30 MA <sub><mark style="color:blue;">enterpise only<mark style="color:blue;"></sub>
* NILOGAN <sub><mark style="color:blue;">experiment<mark style="color:blue;"></sub>