Fix 4.6k Ursa Mini FPN Grid Pattern Noise Using Resolve Node
ABOUT THE ISSUEThe Blackmagic URSA MINI 4.6k is possibly my favorite camera. I got a unit right when they came out and was just blown away. Some of the early units used to have an issue with noise though - some people call it FPN noise, grid pattern noise, there’s a lot of different names and confusion around it.
The only way to fix this used to be in raw footage by editing GreenBayerSplit properties using a program like ExifTool or CornerFix and then opening the files in a compatible Adobe app. That would involve exporting your footage and losing the raw element.
Now you can do this right in DaVinci Resolve using a Power Grade. Just add a node before you grade! Easy! You can still control the raw footage and it’s as if the problem never happened. This is such a huge help for anyone who has footage before the issue was addressed.
FILES
Get Files on GitHub
https://github.com/ursa-mini-46k-fpn-gr ... solve-NodeGet Files on Google Drive
https://drive.google.com/file/d/0B_ZBcS ... dUOEk/viewREADME
Apply only to the footage and in the timeline with the matching resolution—this will guaranty pixel to pixel mapping needed for this to work properly.
IF THE DRX FILES WON’T IMPORT: Select the folder the .drx files are in and import that instead.
URSA Mini 4.6K - Grid Pattern Workaround
The workaround to alleviate the visible grid pattern will only work if applied to the ORIGINAL footage shot by the camera, and when used in certain conditions. Be sure to download the HD-UHD-46K-grid_2.zip file, unzip it, and move it to the desired folder destination in the system. The following settings and steps will help alleviate the issue when working with RAW 4.6K footage and ProRes footage shot in HD and UHD. The zip file also contains the files needed for 2K footage and can be applied in the same fashion.
RAW 4.6
Camera Settings:
Codec: RAW, RAW 4:1, RAW 3:1 - Resolution: 4608x2592
Sensor Area: Full
DaVinci Resolve Settings:
Project Settings > Master Project Settings > Timeline Resolution: Custom For 4608x2592 - Project Settings > Master Project Settings > Video Monitoring > Monitor scaling: Bilinear
Import the footage into the timeline.
In the Color page, go to the Gallery window and open Still Albums
Right click and select Add Power Grade Album (so that you always have a shortcut to the fix) then right click in the grey are and select Import
Navigate to the location of the unzipped folder and select 4.6K_grid_1.1.1.drx (if this is greyed out, set the import window to All Files (*.*)) and Import it. If this isn’t an option, import the entire enclosing folder instead.
Then double click on the still so that it applies the fix to the selected clip in the timeline
ProRes UHD
Camera Settings:
Codec: ProRes (any flavor) - Resolution: 3810x2160
Sensor Area: Window
Detail: Off
DaVinci Resolve Settings:
Project Settings > Master Project Settings > Timeline Resolution: 3840x2160 Ultra HD
Project Settings > Master Project Settings > Video Monitoring > Monitor scaling: Bilinear
Import the footage into the timeline.
In the Color page, go to the Gallery window and open Still Albums
Right click and select Add Power Grade Album (so that you always have a shortcut to the fix) then right click in the grey are and select Import
Navigate to the location of the unzipped folder and select 3840x2160_grd_1.1.1.drx (if this is greyed out, set the import window to All Files (*.*)) and Import it. If this isn’t an option, import the entire enclosing folder instead.
Then double click on the still so that it applies the fix to the selected clip in the timeline
ProRes HD
Camera Settings:
Codec: ProRes (any flavor) - Resolution: 1920x1080
Sensor Area: Window
Detail: Off
DaVinci Resolve Settings:
Project Settings > Master Project Settings > Timeline Resolution: 1920x1080 HD
Project Settings > Master Project Settings > Video Monitoring > Monitor scaling: Bilinear
Import the footage into the timeline.
In the Color page, go to the Gallery window and open Still Albums
Right click and select Add Power Grade Album (so that you always have a shortcut to the fix) then right click in the grey are and select Import
Navigate to the location of the unzipped folder and select 1920x1080_grd_l.1.1.drx (if this is greyed out, set the import window to All Files (*.*)) and Import it. If this isn’t an option, import the entire enclosing folder instead.
Then double click on the still so that it applies the fix to the selected clip in the timeline
If the settings aren’t correct, the workaround won’t work, so if you don’t see a difference double check your settings.