VP9 Profiles: Differences Between 0, 1, 2, and 3

This article explains the functional differences between the four coding profiles—Profile 0, Profile 1, Profile 2, and Profile 3—supported by the libvpx-vp9 video encoder. We will break down how each profile handles color bit depth (8-bit, 10-bit, or 12-bit) and chroma subsampling (4:2:0, 4:2:2, and 4:4:4) so you can select the optimal configuration for your encoding workflow.

In the VP9 video compression standard, profiles define the capabilities of the decoder required to play back a specific video file. The differences between the four libvpx-vp9 profiles are determined strictly by two variables: bit depth and chroma subsampling.

Profile 0: Standard 8-bit Consumer Video

• Bit Depth: 8-bit
• Chroma Subsampling: 4:2:0
• Use Case: Profile 0 is the baseline profile for VP9. It is the most widely supported profile across consumer hardware (smartphones, TVs, computers) and web browsers. This profile is standard for web streaming, including standard-definition (SD) and high-definition (HD) Standard Dynamic Range (SDR) content on platforms like YouTube.

Profile 1: High-Color 8-bit Video

• Bit Depth: 8-bit
• Chroma Subsampling: 4:2:2, 4:4:4, and 4:0:0 (allows for an alpha channel)
• Use Case: Profile 1 retains 8-bit color depth but expands color sampling to support 4:2:2 and 4:4:4. This prevents color bleeding in high-contrast graphics and text. However, hardware decoding support for Profile 1 is extremely rare, meaning playback relies on CPU-intensive software decoding.

Profile 2: 10-bit and 12-bit Consumer Video

• Bit Depth: 10-bit or 12-bit
• Chroma Subsampling: 4:2:0
• Use Case: Profile 2 is designed for High Dynamic Range (HDR) content, such as HDR10 and HLG. By utilizing 10-bit or 12-bit depth, it prevents color banding in gradients (such as skies or shadows). Many modern 4K/UHD streaming devices, HDR TVs, and browsers feature hardware acceleration specifically for VP9 Profile 2.

Profile 3: Professional High-Color and HDR Video

• Bit Depth: 10-bit or 12-bit
• Chroma Subsampling: 4:2:2, 4:4:4, and 4:0:0
• Use Case: Profile 3 combines high bit depth with high color sampling. It is primarily used for premium archiving, professional video production, and high-fidelity mastering where both HDR and lossless color fidelity are required. Consumer hardware support for Profile 3 is practically non-existent.

Quick Reference Comparison Table