above scores are average of 5 runs
please note that these systems are not benchmark systems and are real world

ive been working on this for a while

it lets you measure the time it takes your processor to encode video to different video codecs, it simply times the amount of time it takes to prep and encode a shotcut project file that has 4K video with some text overlay and some awesome music in flac by GUNSHIP

  • bench.x264.py Encoding 3840x2160p24 4K Shotcut Project using qmelt to x264 with Slow Preset and 16 CRF
  • bench.x265.py Encoding 3840x2160p24 4K Shotcut Project using qmelt to x265 with Slow Preset and 16 CRF
  • bench.vp9.py whenever google gets around to implementing proper multi-threading
  • bench.av1.py whenever aomedia gets around to finalizing spec and implementing multi-threading


this should test cpu/ram and ssd/hdd and the results are in seconds

special thanks to iWalkingCorpse for 1500X, Vegetables for 1700 3.8Ghz, Xplode for Threadripper 1950X

This Benchmark is based on Shotcut and MLT open source project https://www.shotcut.org/


Had to get a new Startech HDMI cable as my old generic one was giving me blinking black screen after swapping cables it works perfectly. it seems its a little picky on the cables

The Crimson Additional settings are missing pixel format and overscan option, hope this can be fixed by firmware or driver update

Customer Support

when i asked about a firmware update they responded in 14 minutes. Now thats pretty fast

First setup

  • Get a High Quality 4K Cable Club3D CAC-1310 or Startech HDMM1MP
  • Turn off UHD Colour on Samsung TV
  • Set Colour Depth in Crimson Additional Settings to 8bpc
  • Set Resolution to 3840 by 2160, True Color (32 bit), 60 Hertz in Settings > System > Display Advanced Settings > Display Adapter Properties > List Modes

still issues? try a newer crimson driver

My Setup:

  • AMD A10-7800 APU
  • 16GB RAM (2x8GB 1866mhz)
  • Windows 10 x64 with Crimson 16.1
  • Sapphire Radeon HD 7750
  • Samsung UE55HU7505 55" UltraHD
  • Club3D 1.2 to HDMI 2.0 Adapter (CAC-1070)
  • Startech Pro Series Metal High Speed HDMI Cable 2M (HDPSMM2M)


  • CAC-1070 REV A0-00 FW:7.0e 1552
  • Also tested with HD 7970 3GB Reference Model
  • UHD Colour Mode must be enabled on the HDMI Port (Samsung)
  • Renaming HDMI1 to PC might get you 4:4:4 (Samsung)
  • I need to test it on newer drivers on linux to see if its supported there

Crop Real 4K to UltraHD 4096>3840

ffmpeg -i A001_C014_01217G.4k.y4m -vf "crop=3840:2160:128:0" outputgirl.2160p.y4m

Resize to 1080p

ffmpeg -i outputgirl.2160p.y4m -vf scale=1920:-1 outputgirl.1080p.y4m

Resize to 720p

ffmpeg -i outputgirl.2160p.y4m -vf scale=1280:-1 outputgirl.720p.y4m

Convert source to YUU4MPEG2

ffmpeg -pix_fmt yuv420p -i any-source-video.webm output.y4m

Convert a sequence of images to YUU4MPEG

ffmpeg -f image2 -i "A004_C001_0122K7.00%05d.png" -pix_fmt yuv420p ouput.y4m

extract a single frame

ffmpeg -i input.avi -f image2 -ss 14.342 -vframes 1 frame.png

extract a single frame (altenative method)

ffmpeg -i input.y4m -f image2 -vf select="gte(n\, 1)" -vframes 1 frame.png

extract 1 frame after frame 100

ffmpeg -i input.y4m -f image2 -vf select="gte(n\, 100)" -vframes 1 frame.png

Encoding to VP9 in 4K is awesomely slow, when i mean slow, it is SLOW > 0.2fps but still it has not been optimized or have multicore support yet, it only used 1 core of my 8 core cpu (FX-8350) with 32GB RAM!

`ffmpeg -f image2 -i "E:\redout\tif\A005_C026_01224Q\00%05d.tif" -vcodec libvpx-vp9 -strict experimental -acodec libopus -qmin 0 -qmax 40 -crf 27 -b:v 20M -b:a 64k outputgirl.webm`

change crf to higher (smaller files, worse quality) or lower crf (bigger files, better quality)

the end results are this 4k file, source is tiff from a RED camera, pretty good i say as its only ~6Mbps video bitrate

and in other news

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