AJA Media Reference

Sets whether the incoming video feed is progressive or interlaced. Note that this must match the actual video feed exactly.

Captures video, audio, and ancillary data at the same time. This may decrease your transfer performance, but it guarantees that all data for each frame will be synchronized together. If you experience problems with latency, you can try disabling this option.

Determines the order of the color channels that make up each pixel in the input video, and the number of bits in each channel.

When enabled, the engine embeds the timecode of each frame into the captured video. You can use this to check that the timecode for each frame of input matches the values you're expecting. See Timecode Texel Encoding.

Determines whether the Unreal Engine outputs only the fill image, or both the fill and key images. When you set this to Fill Only, only the fill image is output to the Source set below. When you set this to Fill and Key, the fill image is output to the Source, and the key is output to the Key Source.

Sets the resolution of the video feed produced by this Media Output.

Configures the source of the timing for the internal clock on the AJA card. The card uses this to determine when it should send each frame of video output.

• Free Run - Uses the card's internal clock.

• External - Synchronizes the card's internal clock with the genlock signal that arrives on its reference pin from an external source.

• Input - Synchronizes with the video signal from the input port that you specify in the Sync Source setting below. 

When enabled, the Unreal Engine buffers its output frames before sending them to the AJA card. This may improve the smoothness of the video signal, at the cost of some latency. Leave this option disabled to minimize latency, at the risk of seeing interruptions in the output signal.

Determines the order of the color channels that make up each pixel, and the number of bits in each channel.

Sets the number of buffers used to transfer each frame image from the main thread memory to the AJA card. Lower values are more likely to cause missed frames as it waits for each transfer to complete; larger numbers are more likely to increase latency.

Sets the number of buffers used to transfer each frame image from the GPU to main thread memory. Lower values are more likely to cause a bottleneck on the GPU side as it waits for each transfer to complete; larger numbers are more likely to increase latency.

When this option is disabled, and you don't already have the Unreal Engine genlocked to an input signal, the engine runs at the fastest frame rate it can manage and provides all the frames it generates to the AJA card. Each time the card is ready to output a new frame, it selects one of the frames generated by the Engine.

When this option is enabled, the Unreal Engine does not generate any new frames of output until the AJA card is ready to accept the new frame. The effect is similar to genlock, but instead of locking the Unreal Engine's frame rate to an input signal, it locks the Engine's frame rate to the output timing of the AJA card.

This option is most useful when you don't already have an input signal that you can lock the Unreal Engine's frame rate to, but you want to ensure that the Engine is producing only one output frame for every frame in the output video feed.

Do not enable this option if you already have the Unreal Engine genlocked to an input feed using a custom time step.