[JIML] Channel Settings AJA v.6.0

Owned by Christian Schabasser
Last updated: Oct 16, 2023 by Manuel Grund
4 min read

Settings

You can find a description of each Channel setting below:

The Device Serial Number will only be visible for AJA Video Devices. This Serial Number ensures the alignment of Video Devices with the connected Devices. There have been instances where the connected Devices do not consistently return to the same sequence following a system reboot, particularly with Thunderbolt-based systems.

Kindly note that AJA utilises a 9-digit Serial Number scheme for the Io X3 and Io 4K Plus models. However, just:in mac exclusively exposes the initial 8 digits. The Io X3's Serial Number begins with "7," while that of the Io 4K Plus begins with "5."

Device: Select the Video Device (AJA) for this Channel.

Input Mode: Select the Input Mode for this Channel. Available options, depending on the Device are:

  • SDI (AJA)

  • SDI (AJA 12G)

  • HDMI (AJA)

Input: Choose the Input of the Device for this Channel here (for Blackmagic Design Channels, only option ā€œInput #1ā€ is available).

Audio Input: Choose between different Audio Input (AJA/Blackmagic Design) and Audio Input Channel (AJA only) options. Audio Input options are:

  • Auto (same as video, normally SDI)

  • SDI (by choosing this option, the audio input channel option can be adjusted as well)

  • Analog

  • AES/EBU

Audio Input option ā€œSDIā€: When using this option, it is possible to distribute the incoming audio of ā€œSDI Input1ā€ to all other Channels. Please note that the incoming video streams have to be synced correctly before. We recommend using Frame Stores for such a recording workflows. Moreover, please note that this is an AJA-only feature.

Additionally, there is a special condition, when using the AJA Corvid 88 video device. In this case, you have to use Input 1 & 5 to distribute the incoming audio to all other channels, as this is unfortunately a peculiarity of the AJA video device.

Video Mode: Select the Video mode and ensure that it matches the incoming VideoĀ Signal, which is attached to the selected Channel. If it does not match, a warning will be shown (ā€œNo Signalā€).

Please beware that ā€œPSFā€ video mores are limited to HD modes and AJA devices.

AJA Frame Buffer: This setting overwrites the default Frame Buffer value of an AJA Channel. This setting is required for UHD recording workflows, where the Channel Frame Buffer can be set to a higher value, to avoid any Dropped Frames while recording.

Enable RP-188 (SDI Embedded) Timecode (AJA only): This option enables the ā€œSDI Embeddedā€ Timecode Source option for an AJA Input Channel. By default, this option is enabled.

Enable End-To-End SDI If Available: This option does work for some specific AJA devices, such as the KONA 1 or the KONA LHe Plus, where the incoming signal will be passed to the output port, once the Just In Mac Lite application is running.

File Overwrite Strategy:

  • Append Counter (Default): When using this option, the Just In Mac Lite application will add ā€œ_2ā€ to the actual file name to avoid overwriting an already existing file.

  • Replace: By choosing this option, the Just In Mac LIte application will overwrite a file with the same name at the target location.

Chunk Length: defines the maximum length of the recorded Video.Ā The maximum Chunk Length is 12 hours, the default option is 2 hours (02:00:00:00).

  • If the Recording does not reach the entered Chunk Length, the recorded clips will be automatically truncated to the expected recorded length.

  • RecordingĀ exceeds the entered Chunk Length: A new Recording (generating a new clip) will automatically be started.

Start Timecode:Ā Enabling this option overrides the local time or incoming timecode and makes every new clip start with the defined timecode value.

MXF Write Buffer (Bytes in binary):Ā This setting can be used to tune MXF writing for specific storage requirements, but should only be changed with care as it may lead to unexpected results including write errors. Recommended value: ā€œBlock size of storageā€.

Restart On No Signal if Not Recording: If this option is enabled, the Channel will automatically restart after a signal loss (only in Idle Mode). Available options are:

  • Close container, write to new: Recording to the current file will be stopped and as soon as there is a valid signal again the recording will start into a new file.

  • Close container and stop: Recording will be stopped when a Channel detects a signal loss.

Cache Options:

  • Don't Cache:Ā files are directly written to disk, no caching is done.

  • Cache (Default):Ā tells the internal macOS Ethernet controller to cache data to flush it to the network stack later to improve write performance.

Action on Timecode break:

  • Ignore: The Channel ignores timecode breaks.

  • Create new file: The ChannelĀ creates a new file upon a timecode break.

Preview

You can manually override the resolution,Ā frame rate,Ā and quality of the Video Previews within Just Control. This may be helpful to increase performance when displaying many Channels in Just Control. Please refer to the Channel Preview Options below for more information.

Resolution: Two resolution options are available:

  • High:Ā 640Ɨ360px

  • Low:Ā 480Ɨ270pxĀ 

Frame rate:Ā The preview frame rate can be changed between ā€œ0ā€ (i.e. native frame rate) and ā€œ30ā€ (if the channel frame rate is higher than ā€œ30ā€, then the preview will be limited to 30 fps).

Quality: The ā€œPreview Qualityā€ setting can be changed between ā€œ10%ā€ and ā€œ100%ā€ (the default value is ā€œ50%ā€).

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