OpenMAX (Open Media Acceleration), often shortened as "OMX", is a non-proprietary and royalty-free cross-platform set of C-language programming interfaces.

[1][2] It is intended for low power and embedded system devices (including smartphones, game consoles, digital media players, and set-top boxes) that need to efficiently process large amounts of multimedia data in predictable ways, such as video codecs, graphics libraries, and other functions for video, image, audio, voice and speech.

[10] OpenMAX IL is the interface between media framework, (such as StageFright or MediaCodec API on Android, DirectShow on Windows, FFmpeg or GStreamer on Linux), and a set of multimedia components (such as an audio or video codecs).

[11] OpenMAX DL is the interface between physical hardware, such as digital signal processor (DSP) chips, CPUs, GPUs, and software, like video codecs and 3D engines.

It allows companies to easily integrate new hardware that supports OpenMAX DL without reoptimizing their low level software.

Its status as an open cross-platform API enables developers to port the same source across multiple devices with minimal effort.

The OpenMAX IL API design devotes particular attention to use case flexibility and optimized data transfers between components.

[16] The OpenMAX DL API defines a set of low-level multimedia kernels or media processing building blocks.

Promoting members in 2008 were AMD, Apple, ARM, Creative, Dell Inc, Ericsson, Freescale, Imagination Technologies Group plc, Intel, IBM, Motorola, Nokia, Nvidia Corporation, Samsung Electronics Co. Ltd, SK Telecom, Sony Computer Entertainment Inc and Texas Instruments.