User Manual

Table Of Contents
Here’s an explanation of the different components of a basic node tree where all nodes are
connected in serial, one after the other, and how they work together:
Source Input: The green source node to the far left is the clip’s image data as
processed by the Sizing and Source decode settings, ungraded. The Source input
feeds RGB data to the grade, and is connected to the RGB input of the first node in
your tree. If necessary, you can connect the Source input to more than one Corrector
node, creating multiple simultaneous streams of image processing emerging from the
original source state of the image that you can eventually recombine in different ways
using the Parallel or Layer Mixer nodes.
Nodes: Each node in the node graph represents a collection of image processing
operations that can be enabled or disabled separately from any other node in the
graph. By separating operations into multiple nodes, you’re able to precisely control the
order of all image processing operations in DaVinci Resolve to create many different
corrections and effects. The green RGB inputs and outputs are used to connect
these nodes together. Each node’s thumbnail image shows how the clip looks at that
particular stage of the grade, giving you a visual indication of what each node is doing,
and small badges below each node show you which specific operations are being
applied by that node.
RGB Inputs and Outputs: The green inputs and outputs at the upper right and left of
each node are used to connect the RGB image that’s output from one node to the RGB
input of the next node. For a Corrector node to have an effect, you must connect both
its RGB input and its RGB output to neighboring nodes in the tree. Furthermore, every
single node in the Node Editor must be connected for a grade to be enabled; having
any disconnected node in the node tree disables that grade until it’s fully connected.
Key Inputs and Outputs: The blue inputs and outputs at the bottom right and left
of each node are used to route the key channel generated by a node’s Qualifier or
Window controls, or imported via a Matte clip that you previously associated with a
clip in the Media page. When you connect the key output of one node to the key input
of another, you basically copy the first node’s key to the second node. You can also
combine the key outputs of multiple nodes in various ways using the Key Mixer node.
Node Tree Output: The RGB output of the last node in a tree must be connected to the
green Node Tree output node, which “completes the circuit” of image processing, and
passes that correction on to the next stage in the DaVinci Resolve image processing
pipeline. If the output is not connected, the node tree is disabled and has no effect on
the clip. You can only connect one RGB output at a time to the Node Tree output.
Second Source Input (for RED HDRx): You can access the alternate highlight exposure
of RED HDRx media by exposing this optional second Source input. For more
information, see“Mulit-Channel RED HDRx Support” in Chapter 127, “Channel Splitting
and Image Compositing.
Second Source Input (from Fusion page): You can also create additional sources to
route in masks or mattes created in the Fusion page for use as keys in the Color page.
Alpha Output: It’s possible to create regions of transparency for compositing directly
in DaVinci Resolve by connecting a key output to an optional Alpha output. For more
information, see Chapter 126, “Combining Keys and Using Mattes.
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