Native AV1 vs libaom-av1 vs libsvtav1 in FFmpeg

This article compares the three primary AV1 video encoders available in FFmpeg: the experimental native AV1 software encoder, the reference encoder libaom-av1, and the highly-optimized libsvtav1. We will examine their speed, compression efficiency, resource usage, and ideal use cases to help you choose the best encoder for your video processing pipeline.

The Native AV1 Encoder (av1)

FFmpeg includes an experimental, native software AV1 encoder (invoked using -c:v av1).

• Status: Highly experimental and under active development.
• Performance: It is currently slow and lacks the deep performance optimizations found in mature external libraries.
• Features: It supports basic encoding features but lacks advanced rate-control algorithms and psychovisual optimizations.
• Best Use Case: Testing and environments where external libraries cannot be compiled or linked due to licensing or distribution constraints. It is not recommended for production use.

libaom-av1 (The Reference Encoder)

Developed by the Alliance for Open Media (AOMedia), libaom-av1 is the official reference encoder for the AV1 format.

• Compression Efficiency: It offers the highest possible visual quality at the lowest bitrates. If file size minimization is your absolute priority, libaom-av1 is the industry benchmark.
• Performance: It is notoriously slow. Even with multi-threading enabled, it does not scale efficiently across modern high-core-count processors.
• Features: Highly configurable with granular controls over encoding tools, partitioning, and tiling.
• Best Use Case: Archiving, high-quality offline encoding, and scenarios where encoding time is not a constraint but bandwidth savings are critical.

libsvtav1 (Scalable Video Technology AV1)

Developed primarily by Intel and Netflix, libsvtav1 is a highly-optimized software encoder designed specifically for modern CPU architectures.

• Performance: It is currently the fastest software AV1 encoder. It scales exceptionally well across multiple CPU cores and threads, utilizing AVX2 and AVX-512 instruction sets.
• Compression Efficiency: While slightly behind libaom-av1 at the absolute highest quality settings, it offers highly competitive efficiency at fractions of the encoding time.
• Features: It features a user-friendly preset system (typically ranging from Preset 0 for highest quality/slowest speed to Preset 13 for fastest speed) that allows users to easily trade speed for quality.
• Best Use Case: Video-on-demand (VOD) services, live streaming, general-purpose media transcoding, and any production environment requiring a practical balance of speed and efficiency.

Summary Comparison