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Can anyone able to encode a 2160p 4K video with HDR in under 24 hours using a consumer-grade computer?
A 4K UHD video encoded with HDR requires at least 4 GB of RAM, whereas a non-HDR 4K video can be encoded with 2 GB of RAM.
The HEVC (High Efficiency Video Coding) codec, used for HDR encoding, is 50% more efficient than the H.264 codec.
HDR10, a type of HDR, uses Perceptual Quantizer (PQ) to encode brightness and color, whereas HLG (Hybrid Log-Gamma) uses a combination of PQ and gamma correction.
The human eye can perceive up to 10,000 different colors, but most monitors can only display 8-bit colors (256 colors per channel), making HDR essential for accurate color representation.
Encoding a 4K HDR video with a bitrate of 50 Mbps requires a minimum CPU speed of 2.5 GHz and 8 GB of RAM.
The x265 encoder, used for HDR encoding, can reduce file size by up to 50% compared to H.264 encoding.
The Dolby Vision format, a type of HDR, uses dynamic metadata to adjust brightness, color, and contrast on a scene-by-scene basis.
HDR video mastering requires a color grading suite, a specialized software used to adjust color, brightness, and contrast of the video.
The ITU-R BT.2020 color space, used for 4K HDR video, has a wider color gamut than the traditional Rec.709 color space.
4K HDR video encoding requires a minimum disk space of 1 TB for every 10 hours of video footage.
The H.265 codec, used for HDR encoding, supports up to 300 fps, whereas H.264 supports up to 60 fps.
The x265 encoder uses a 10-bit color depth, which allows for 1024 possible colors per channel, compared to 8-bit color depth, which allows for 256 colors per channel.
Encoding a 4K HDR video requires a GPU acceleration, such as NVIDIA CUDA or AMD OpenCL, to speed up the encoding process.
The Master Display Metadata, used in HDR10, contains information about the maximum brightness, color, and contrast of the display.
The average bitrate for a 4K HDR video is 50-100 Mbps, compared to 10-20 Mbps for a non-HDR 4K video.
The 4:2:0 chroma subsampling, used in H.264 encoding, reduces the color information by 75%, whereas the 4:4:4 chroma subsampling, used in H.265 encoding, preserves the original color information.
The Color Volume, a measure of color accuracy, is increased by 20% when using HDR compared to non-HDR video.
The Dynamic Metadata, used in Dolby Vision, can adjust the brightness, color, and contrast of the video up to 100 times per second.
The HDR10+ format, a type of HDR, uses dynamic metadata to adjust brightness, color, and contrast on a scene-by-scene basis, similar to Dolby Vision.
The human visual system can perceive up to 120 frames per second, making high-frame-rate encoding essential for smooth motion representation.
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