HDR Encoding

High Dynamic Range (HDR) encoding enhances video quality by expanding contrast ratios and color depth, resulting in more vibrant and realistic images.

High Dynamic Range (HDR) encoding is a process that enhances video content by increasing its dynamic range—the spectrum between the darkest blacks and the brightest whites—and broadening its color gamut. This results in more vivid, lifelike images with greater detail in both shadow and highlight areas.

Key HDR Formats:

  • HDR10: An open standard using static metadata for consistent brightness and color across the video.
  • HDR10+: Enhances HDR10 with dynamic metadata, adjusting settings per scene or frame.
  • Dolby Vision: A proprietary format with dynamic metadata and 12-bit color depth for superior detail and brightness.
  • Hybrid Log-Gamma (HLG): A broadcast-friendly HDR format without metadata, compatible with SDR displays.

Encoding Considerations:

  • Bit Depth: Typically 10-bit or higher to preserve detailed color and contrast.
  • Color Space: Uses Rec. 2020 for a broader color range compared to Rec. 709.
  • Metadata Handling: Proper use of static or dynamic metadata is essential for accurate HDR presentation.

Encoding Tools and Software:

  • HandBrake: Supports HDR10/HDR10+ encoding with bit depth management and metadata passthrough.
  • FFmpeg: Versatile for HDR encoding and metadata control, compatible with VP9 and other codecs.
  • FastFlix: GUI-based tool simplifying HDR encoding workflows with FFmpeg backend.