It's more like the colorists use a special display configured to provide that format, and then do a separate color grade based on that. Very few tools actually support converting to and from that color space today, and nothing that's FOSS I'm aware of. Processing needs to be done in linear light, and even tools like After Effects don't have the ability to export from their internal linear light space to PQ, and I'm told the existing icm/icc file format can't even describe the transform adequately.
Gamma has been baked into our assumptions about video for, what 70 years now? So pretty much no tool has much of an idea for how to handle a polynominal mapping between Y' and actual display brightness. The "HDR-10" format which is what everyone is using for actual HDR content on real displays uses the PQ Curve (SMPTE 2084) instead of gamma to map luma codes to actual brightness. While TVs should be able to play 2020 content in some fashion, the size of the luma range and gamut are so huge that good tone mapping isn't technically practical, as possible luma and chroma values are so far out of what even the best consumer TVs today support. There may be something else for HDR than simply using the BT.2020 matrix?Ĭorrect. If you used the conversion in AviSynth your source is no longer BT.709. preset slow -range limited -colormatrix bt2020nc -colorprim bt2020 -transfer bt2020-10 -output "output_x265.h265"
preset veryslow -tune stillimage -range tv -colormatrix bt2020nc -colorprim bt2020 -transfer bt2020-10 -output "output_x264.h264" Click here for ordering information direct from .ĪV NIRVANA has several evaluation copies on hand.Code: ffmpeg.exe -s 3840x2160 -r 25.000 -i "import.mp4" -an -sn -f rawvideo -pix_fmt yuv420p10le - | What’s even better? You can buy the disc right now and have it delivered to home in a matter of days. According to included specs, the disc carries material with 10-bit color and Dolby Vision, HDR10, HDR10+, HLG, and SDR. Owners can use these tools set up displays for optimal visual clarity while evaluating key performance parameters. Owners will find many classic test patterns from past Spears and Munsil releases, while new material is meant to address both current and future video technologies (including 8K HDR). In a few cases, we’ve had to create our own format, because no existing file format could represent the pattern we needed to create.” If a pattern needs to be generated directly in a very specific color space and data format, we generate it in that color space and format we’re not limited to what you can do with off-the-shelf graphics software.
We believe this disc completely changes the game for test and evaluation discs, by making use of all of the features and range that HDR and wide-gamut standards can offer.”ĭon Munsil adds: “We build every pattern using our own tools, written from scratch in C++. Nearly every pattern is encoded in multiple versions, with metadata and peak levels adjusted for a wide variety of HDR display technologies including 600, 1,000, 2,000, 4,000, and 10,000 nits.Īccording to Stacey Spears: “Every pattern has been rethought with High Dynamic Range and Ultra HD in mind.
And while many of the disc’s offerings are crafted for professional calibrators, included material will also appeal to casual users hoping to squeeze more performance from their preferred TV.
Years in the making and long-rumored, this is the reference-grade 4K UHD test disc that enthusiasts and pro calibrators have been asking for.īorn from the incredible success of both DVD and standard Blu-ray versions of the disc, Stacey Spears and Don Munsil have re-joined forces to unleash more features and patterns to dial-in and evaluate today’s high-test 4K displays. The highly anticipated Spears and Munsil UHD HDR Benchmark Disc ($39.95) has finally launched.
(July 1, 2019) Here’s a bit of rather exciting news.