Does SVT-AV1 Support 10-bit Encoding?

Yes, the libsvtav1 encoder supports 10-bit color depth encoding natively out of the box. This article explains how SVT-AV1 handles 10-bit depth, why it is highly recommended for AV1 encoding, and how you can implement it in your FFmpeg workflows without needing any special builds.

Native 10-Bit Support in SVT-AV1

Unlike older encoders that required separate compilation pipelines or different library versions for 8-bit and 10-bit color depths, libsvtav1 includes unified support for both depths in a single codebase. When you install or compile FFmpeg with libsvtav1 enabled, you immediately gain the ability to encode high-dynamic-range (HDR) and wide-color-gamut (WCG) content in 10-bit.

SVT-AV1’s internal architecture is highly optimized for 10-bit pipelines. The encoder processes video with high-precision math, which minimizes rounding errors during the compression process.

Why You Should Encode in 10-Bit AV1

Even if your source video is standard 8-bit (such as typical SDR footage), encoding to 10-bit using SVT-AV1 is highly recommended.

  1. Reduced Color Banding: 10-bit encoding provides 1,024 levels of color per channel compared to 8-bit’s 256 levels. This drastically reduces color banding in gradients, such as skies, sunsets, or dark scenes.
  2. Better Compression Efficiency: Because of how the AV1 compression algorithm works, encoding an 8-bit source into a 10-bit container generally yields better visual quality at the exact same bitrate, with only a negligible impact on encoding speed.

How to Encode 10-Bit Video Using FFmpeg and libsvtav1

To trigger 10-bit encoding, you simply need to specify a 10-bit pixel format in your FFmpeg command. The most common format for standard consumer video playback is yuv420p10le.

Here is a basic FFmpeg command to encode a video in 10-bit using SVT-AV1:

ffmpeg -i input.mp4 -c:v libsvtav1 -pix_fmt yuv420p10le -crf 26 -preset 4 -c:a copy output.mkv

In this command: * -c:v libsvtav1 selects the SVT-AV1 encoder. * -pix_fmt yuv420p10le forces the encoder to output a 10-bit YUV 4:2:0 video stream. * -crf 26 sets the Constant Rate Factor (quality level). * -preset 4 determines the encoding speed/efficiency tradeoff.

Hardware players and modern browsers with AV1 decoding capabilities can easily decode and display 10-bit SVT-AV1 streams, making it a highly compatible and future-proof choice for video archiving and streaming.