Capture Input
A live signal from a capture card — SDI, HDMI, DisplayPort, ST 2110 or whatever else the card presents. Which section appears depends on the card the asset was created for: a Datapath card draws Capture Input, a Blackmagic Design card draws DeckLink Capture Input.
Capture Input
Datapath cards.
|
Field |
Description |
|---|---|
|
Name |
Editable name for the asset. |
|
Input |
Which physical input on the card to take, listed as |
|
Format |
Signal format. The card reports what it detects; set it explicitly when detection is ambiguous. |
|
Audio |
Which embedded audio to take with the video, as |
|
Allow FS 3D capture |
Accepts a frame-sequential 3D signal. |
|
Hold Last Frame |
Keeps the last received frame on screen when the signal drops, instead of going black. Choose deliberately: black makes a lost feed obvious, holding hides it. |
While the asset is playing, the signal line below the settings reads <width>x<height>, <rate> Hz, <signal type> — and STEREO when a frame-sequential 3D signal is locked. Queued samples and Tempo under it report the state of the incoming audio stream. They are diagnostics — a queue that grows steadily means the source and the server disagree about timing.
DeckLink Capture Input
Blackmagic Design cards.
|
Field |
Description |
|---|---|
|
Name |
Editable name for the asset. |
|
Device |
Which card to take the signal from. Only devices that can capture are listed; (none) when nothing is selected or the saved card is absent. |
|
Input |
Which connector on the card: Auto, SDI, Optical SDI, HDMI, Ethernet, Optical Ethernet, Component, Composite, S-Video. Only the connectors the card has are offered, and the list is hidden on a card with just one. Auto leaves the choice to the driver. |
|
Audio Input |
Which audio connection to take with the video. Only the connections the card has are offered. |
|
Audio Channels |
How many audio channels to take, |
|
Allow 3D capture |
Accepts a stereoscopic 3D signal. |
Below the separator, four read-only lines report what is arriving:
|
Readout |
What it means |
|---|---|
|
Signal |
The locked signal, or No signal detected. |
|
Resolution |
Width × height of the captured image. |
|
Capture Format |
The format the card is delivering. |
|
Asset Format |
The format the asset presents to the rest of Backstage, with its bit depth. |
Related
Supported Third Party Hardware — which cards are supported, and what they connect with
Set Up DeckLink (Blackmagic Design) Capture and Output — DeckLink specifics
Name, Location, Mapping, Format, Sampler and the rest are the same on every visual asset — see Visual Assets Default Properties.