What Is the Maximum Resolution Supported by Libaom?

The libaom library is the official open-source reference encoder and decoder implementation for the AV1 video coding format, developed by the Alliance for Open Media (AOMedia). Under the AV1 bitstream specification, the architecture supports a maximum video resolution of 16384 × 8704 pixels. This architectural limit allows libaom to process and compress next-generation video formats up to 16K Ultra HD, accommodating extreme resolutions for panoramic, immersive, and highly specialized digital video applications.

AV1 Architectural Constraints and MaxPicSize

The technical boundaries of libaom are governed directly by the standardized profiles and levels defined in the AV1 specification. The highest tier within the standard—Level 6.3—explicitly outlines the maximum capabilities of the compliance toolset:

Because libaom is designed to strictly implement these specifications, its codebase natively accommodates these limits. At its absolute threshold, the architecture is capable of encoding or decoding frames that stretch to 16K horizontally or roughly 8K vertically, as long as the total pixel count does not violate the standardized boundaries.

Hardware and Practical Limits in Software

While the software architecture natively supports up to 16K video streams, computing resource limitations typically restrict deployment in real-world scenarios. Encoding high-resolution imagery using libaom is highly memory-intensive and computationally taxing.

For instance, processing video at Level 6 or above often demands upwards of 64 GB of RAM per encoding thread to track internal structures like the 128x128 pixel superblocks and comprehensive spatial-temporal prediction trees. As a result, standard integrations—such as using libaom via FFmpeg—are predominantly optimized for 4K (3840 × 2160) and 8K (7680 × 4320) resolutions, which cleanly align with commercial consumer hardware and available hardware-accelerated decoding pipelines.