IRIDAS Stereo 3D Workflow with SI-3D files
Contents
1. ments The example images used for this document are recorded with 2 SI2K cameras as Cine form RAW For this workflow simply open the Look browser select the 5600 or 3200K preset All RAW adjustments should be applied to the basic video layer This will ensure that they will get applied to both left and right eye automatically For all adjustments on grading tracks above the video layer you can select whether you want to apply the changes to both or left or right eye only A typical example for selected left or right eye grading is the adjustment for chroma and luma shifts created by the mirror in a mirror rig To see left and right eye side by side press lt ALT D gt You can then turn on splitscreen press F9 or open the Screen Layout window and make adjustments there 2009 IRIDAS www iridas com 12 IRI DAS SI 3D Workflow Note adjustments such as dealing with color shifts created by a mirror rig usually apply to all material coming off the same rig camera lens combination Shooting a test chart and creating a precise look preset will help to save time when correcting for the mirror rig shifts You can apply one look file along the entire timeline to take care of this A l ES F olaj 66 5800g 18 02 07 13 18 04 04 13 18 34 36 13 15 04 35 15 00 20 38 18 2 Selective Left or Right Eye Grading The grading panel will show an additional selection for Secondanes Stereo2. DAS 3 SI 3D Workflow Organizing Stereo 3D Footage DualStream applications automatically find the corresponding footage for the other eye when you drop a sequence into the timeline In order for this to work the sequences need to use either one of the following naming conventions in the same position in their fully qualified path e left and right Left and Right e LEFT and RIGHT e Land _R lf and rt e LF and RT File Path Examples Scenario A both left and right eye are on the same Volume X Footage left Shot Version Test frame siv X Footage right Shot Version Test frame siv e X Footage left_eye Shot Version Test frame siv X Footage right_eye Shot Version Test frame siv e X Footage left Shot Version Test_L frame siv X Footage right Shot Version Test_R frame siv e X Footage left Shot Version Test left siv X Footage right Shot Version right siv 2009 IRIDAS www iridas com 7 IRI DAS SI 3D Workflow Scenario B left and right eye are stored on 2 discrete Volumes Running OS X please ensure to use Volume Names LEFT and RIGHT Running Windows please use R and L drive letters e L Footage Shot Version Test frame siv e R Footage Shot Version Test frame siv Note Make sure you don t have any of the replacement wildcards as part of your regu lar filename otherwise they will be replaced These examples would not work e X Footag
3. to get easy access to x and objects Then set back the y parameters horizontal offset to return to original parallax Image after changing geometry offsets 2009 IRIDAS www iridas com 15 IRI DAS SI 3D Workflow Adjusting the Zero Parallax You can continue to work with the same Pan amp Scan track you used to work on rotation and vertical offset just be sure the checkbox for mirroring horizontal offset Zero Parallax is checked Alternatively create another Pan amp Scan track above the current layer so you can be sure to not touch other geometry adjustments you made already Tip Copy the first Pan amp Scan track after creating keyframes along the edits You can then use one layer for rotation and vertical offsets one layer for Zero Parallax without creating keyframes twice To copy a Pan amp Scan track use Ctrl left mouse over the handle icon at the begin ning of the Pan amp Scan track 2009 IRIDAS www iridas com 16
4. IRI DAS SI 3D Workflow Stereo 3D Workflow with SI 3D files IRI DAS SI 3D Workflow DualStream 3 0 The 3rd generation of IRIDAS DualStream support for working with Stereo 3D material includes support for virtually every display technology available today A list of the most common technologies and the required changes in your SpeedGrade setup starts this section about using DualStream To take advantage of SpeedGrade s capability to automatically load left and right eye footage be sure to adopt one of the file naming conventions listed in the section after the display setup scenario Finally the fun part learn more about he 3D adjustment and stereo grading features in the last section on using DualStream 2009 IRIDAS www iridas com 2 IRI DAS SI 3D Workflow Stereo 3D Setup Scenarios SpeedGrade XR and SpeedGrade DI can be used on either a single screen with both 3D image and UI on one display or as a dual monitor setup A basic dual monitor setup uses two monitors connected via 2 DVI outputs the advanced dual monitor setup utilises the NVIDIA QuadroFX SDI technology to allow for real time 10 bit output over 2x Single Link SDI The NVIDIA QuadroFX SDI setup requires Windows XP32 or Windows XP64 OS X does not support this technology The best setup for Version 2009 depends on the display technology for the 3D display For all setups we recommend using NVIDIA driver 182 65 FAQ do need to enable the stereo settin
5. L Stereo 182 65 This setup allows you to send left and right image to 2 separate DVI outputs The user interface will appear on the stereo output on both eyes To enable OpenGL Stereo acces the NVIDIA control panel set both displays to NVIDIA clone mode Then change the following settings under 3D Performance Settings OpenGL Stereo ON Tripple Buffering ON Restart the machine after making these changes Then open the settings in SpeedGrade push S choose Display Select Shutter Glasses from the stereo pull down menu Restart the application Advanced Dual DVI Setup NVIDIA QuadroFX Dual SDI plus BlackMagic HDLink Pro Requirements Windows XP32 XP64 NVIDIA QuadroFX 5800 SDI certified driver for QuadroFX SDI 182 65 2x BlackMagic HDLink Pro 2009 IRIDAS www iridas com RIDAS 8D Workflow This setup allows for having discrete left and right channel output while preserving one screen for GUI only This setup is recommended if the main purpose for the setup requires interactive work such as adjusting the stereoscopy stereo grading To enable this setup follow these steps Make sure the SDI output is not activated by another application and not used to mirror your desktop Connect the NVIDIA SDI with one BNC cable per channel to the HDLink Pros Connect each HDLink via DVI to your Planar display or your 2 projectors Open the settings in SoeedGrade select SDI Dual DVI choose the co
6. With every new grading clip you add to the timeline the Mask default will be Both eyes You can easily change this to St tereg either Left eye or Right eye just use the pull down menu to apply changes The selection applies to the entire grad Both eyes ing clip left eye Right eye Tip If you want to work with the same mask but apply different grades for left and right eye simply start with creating the mask on one clip then copy this clip onto another grading track above You now have the same mask twice at the same position and grades can be made to appear on either Left or Right eye only 2009 IRIDAS www iridas com 13 IRI DAS SI 3D Workflow Stereo 3D Adjustments SpeedGrade s Pan amp Scan technology includes a section that allows for adjusting Zero Parallax rotation as well as horizontal offset Please check the chapter on working with Pan amp Scan to get to know the basic tools of the Pan amp Scan Panel Adjusting Geometry Offsets It is easiest to make adjustments for geometry offsets Display Options while the stereo image is displayed in red cyan or differ Display engine OpenGL ence matte Both modes can be accessed via the stereo E m penQL stereo erence map off Swap stereo e red cyan pattern settings pull down press lt S gt select Display interlaced scanlines interlaced columns To get started add a Pan amp Scan track to your timeline Skia This is a glob
7. al track to make adjustments for a specific are clip go to the first frame of the clip then add a keyframe to the Pan amp Scan track x Untitled 7 Origin 00 00 00 0 15 55 38 14 15 56 15 03 T00 0436 05 S Turn on the stereo adjustment options to the right in your Pan amp Scan Panel Once turned on they will mirror all changes you apply via numerical input or the widget for left and right eye This reduces the loss of quality to the absolute minimum asop posed to making geometry changes on eye only Mode Preview Scale 1 Unrestricted Crop W1920 H1080 V Mirro honzontal pan for nght eye Widget om Offset 0 Unrestricted Preset 1080p v v Mirror ertical pan for right eye Rotation 0 Unrestricted Keyframes r0Auto rO r0 rO All 44r0 ror v Mirof rotation for right eye St 4h x Untitled 01S avi Cts 49 74 70 15 00 26 2718 S 2009 IRIDAS www iridas com 14 IRI DAS SI 3D Workflow Identify the geometry offsets in the image it s usually helpful to reduce the parallax first by moving the widget until you see the main objects on the image overlapping Original image in difference Step 1 changethe horizon Step 2 change rotation map view rotation and tal offset with the widget and vertical offset until horizontal offset are hard to reduce the 0 parallax you see a minimum offset to judge Use Tangent controls on across the image If in the Wave or the CP200 BK doubt focus on the main
8. e base Default Offset 0 Mirror Hariz 2009 IRIDAS www iridas com 9 IRIDAS Tip If the majority of your clips is flipped you can change the defaults before add ing them to the timeline Open the Set tings press lt S gt select Editing Use the checkboxes for vertical or horizontal mir roring All clips you add to a timeline after changing these presets will be loaded flipped according to your new settings You can still make changes in the Reel Browser after your have added the clips Swap eyes If one of your reels has swapped left and right eye you can correct for this with the Left Right swap button Hover the mouse over the reel you want to swap the L lt gt R button becomes visible Click it to swap eyes Note Make sure your display is set up correctly The easiest way to verify this is to load the left right clip available in stereo subdirectory of your program installation If left right are reversed flip the eyes in the display setup as discussed in the previous chapter SI 3D Workflow Editing v Select clips under master playhead Desktop V Follow dissolves File Formats Dynamic Quality R3D Sound When setting in out to clip add 0 T frames left and 0 Tack Display time in frames not as timecode Lookup Tables esse When a stereo clip is newly created Timecode Flip the left eye reel by default Horizontally Vertically Flip the right eye reel by defaul Hori
9. e left Shot Version Test Compositing_Shot_left_Lowres dpx e X Footage right Shot Version Test Compositing_Shot_right_Lowres dpx The _Lin the left eye filename s _Lowres would be substituted with _R and result in right right_Rowres dpx which cannot be found 2009 IRIDAS www iridas com IRI DAS SI 3D Workflow Working with Stereo 3D Footage To work with a stereo timeline enable the Stereo check bereg Ongin 00 00 00 00 box in the timeline Now use the desktop to add a shot or multiple shots from either left or right eye branch to a new timeline The cor responding other eye will automatically be loaded Note If you mainly work in stereo you can change the default for new timelines by checking the Enable Stereo TE checkbox in the Editing settings Now newly created timelines are stereoscopic by default Applying Basic Stereo Parameters Verify left and right eye pairs To verify that both eyes are loaded open the Reel Browser ALT R or CP200 TS More Reels Each shot that you add to the timeline will appear as left and right eye pair Adjust the basic stereo parameters next If the footage is recorded with a side by side rig you can skip the next step Adjust horizontal and vertical mirror If the footage is recorded with a mirror rig invert the horizontal or vertical mirroring with the checkboxes in the Reel Browser Check the footage to see which eye needs the inversion Tim
10. gs in the NVIDIA Control Panel SpeedGrade can drive almost all current Stereo 3D display technologies directly chang ing the NVIDIA settings is not required except for active shutter glasses that are directly attached to the NVIDIA Stereo DIN connector and systems that require one DVI input per channel 3D DLP systems Samsung and Mitsubishi both offer 3D DLP products The monitors run at 120 Hz sizes vary between 48 and 73 To view stereoscopic content active shutter glasses are required The stereo mode in SpeedGrade to drive these monitors is called pattern select it from the stereo mode list in the application s settings under Display JVC and Hyundai 3D TV systems These 46 Stereo 3D Displays are line by line systems interlaced scanline stereo Select interlaced scanlines in the stereo display mode selector under Settings Display to enable Stereo 3D viewing on the JVC and Hyundai 46 2009 IRIDAS www iridas com 3 IRI DAS SI 3D Workflow Dual DVI stereo A number of stereo display setups require 2 DVI outputs from the workstation Each output carries one eye only This applies to Planar stereo screen with passive glasses linear polarization Dual Projection with passive glasses linear or circular polarization L R side by side setups using 2 displays Basic Dual DVI Setup NVIDIA OpenGL Stereo Requirements Windows XP32 XP64 NVIDIA QuadroFX 5800 certified driver for OpenG
11. oad the files click the stereo checkbox on the timeline Then open the desktop find the folder stereo in your SpeedGrade installa tion Load either left or right SpeedGrade will automatically load both eyes Hit lt ALT D gt to put the images in side by side view You should see both images for left and right side by side C Dual Stream IRIDAS Hit lt ALT D gt again to turn on the selected stereo mode and turn on your glasses left Dual and the 4 arrows should only be visible to your left eye right Stream the 4 lines and the IRIDAS logo should only appear on right eye If this is inversed check the following Active shutter glasses some emitters have a switch to inverse stereo Reverse the set tings of the emitter Active shutter glasses on Samsung and Mitsubishi displays both the emitter as well as the display itself have switches to inverse stereo Refer to the user manual be sure both don t use inversed settings Passive systems such as the JVC 46 These systems don t have a switch to inverse stereo If the image seems to be inverted it s easiest to swap eyes in the settings of SpeedGrade Open the settings choose Display use the checkbox for swap eyes Dual SDI stereo if the eyes are swapped you most likely need to swap the BNC cables If you re using a device like the Stereobrain check the settings for the processing unit 2009 IRIDAS www iridas com 6 IRI
12. rrect resolution and refresh frequency In the pull down below choose Dual 4 2 2 Click the Enable checkbox and restart the application Dual SDI output This setup is designed to drive either 2 projectors with SDI inputs or to allow for a com bination of a reference grade monitor with any other 3D display such as the JVC 46 or the 3D DLP systems Make sure the SDI output is not activated by another application and not used to mirror your desktop Connect the NVIDIA SDI with one BNC cable per channel to the projection system Open the settings in SoeedGrade select SDI Dual DVI choose the correct resolution and refresh frequency In the pull down below choose Dual 4 2 2 Click the Enable checkbox and restart the application To combine Dual SDI with systems such as the JVC 46 and the 3D DLPs you ll need a unit such as Inition s Stereobrain that can split the SDI signal as well as producing the various output modes for the other systems in parallel over DVI HDMI Line by Line TI Pattern Anaglyph Workstation Stereo Processor Reference grade system NVIDIA Dual SDI e g StereoBrain plus Stereo Display 2009 IRIDAS www iridas com IRIDAS nn Testing your Stereo Setup Before you start working on a new project it s recommended to run the test file you ll find in the stereo folder of your SoeedGrade installation This file allows for avoiding inversed stereo settings on your display To l
13. zontally Vertically NASLA 15 36 28 15 Time base Time base Default 7 Offset Offset d Miirror halirror edariz Vert Ranges used Le gt R J SCD Ranges used 2009 IRIDAS www iridas com 10 IRI DAS SI 3D Workflow Adjusting Temporal Offsets A temporal offset occurs when the cameras were not started at exactly the same time It is easiest to make adjustments for temporal offsets while the stereo image is displayed side by side Press Alt D to toggle side by side and regular stereo view Keep the Reel Browser open and close all other browsers Play the shot you want to adjust If there s a clapperboard at the beginning or end of the shot play until you see the clapperboard closed in either left or right eye Use frame step forward and backward left and right arrow keys to get this narrowed down Iden tify how many frames offset exist between left and right eye You can interactively move the offset by clicking and dragging the spinner button to the right of the offset edit box In our example you d have to set 1 for left eye Tip if there s no clapperboard present find a frame with action that only lasts for one frame If possible use a clapperboard with time code display to help the process of Straightening temporal offsets 2009 IRIDAS www iridas com IRI DAS SI 3D Workflow Basic Color Adjustments Make sure to apply RAW adjustments before you start working on 3D color adjust
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