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GitOrigin-RevId: f72a0f86c2c2acdb1920973c718a9e26ed3ec4b6
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+---
+layout: default
+title: Packets
+parent: Framework Concepts
+nav_order: 3
+---
+
+# Packets
+{: .no_toc }
+
+1. TOC
+{:toc}
+---
+
+Each calculator is a node of of a graph. We describe how to create a new calculator, how to initialize a calculator, how to perform its calculations, input and output streams, timestamps, and options
+
+## Creating a packet
+
+Packets are generally created with `MediaPipe::Adopt()` (from packet.h).
+
+```c++
+// Create some data.
+auto data = gtl::MakeUnique<MyDataClass>("constructor_argument");
+// Create a packet to own the data.
+Packet p = Adopt(data.release());
+// Make a new packet with the same data and a different timestamp.
+Packet p2 = p.At(Timestamp::PostStream());
+```
+
+Data within a packet is accessed with `Packet::Get<T>()`