The just:in linux Channel settings depend on the Channel input type:
SDI/HDMI Inputs
NDI®5 Inputs
SRT Inputs
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Below you can find information about all three different Channel Input types.
SDI/HDMI
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Channel Name
Edit the Channel name by double clicking on the channel name label within theDevices “Devices & Channel ListChannel” list.
Input Mode
Here you can select the Input Mode of the Channel. Available options are:
SDI (Blackmagic Design)
SDI (AJA)
SDI (AJA 4x4K-Quad)
SDI (AJA 4K-2SI)
SDI (AJA 12G)
SDI (AJA 4x8K-Quad)
SDI (AJA 8K-2SI)
HDMI (AJA)
Device
When the just:in linux appliance is running with multiple Video Devices, you can choose the specific Video Device here. Normally the just:in linux appliance is running with one video device only.
Input
Choose the Video Device Input here (Input #1 - Input #8).
Video Mode
Select the Video Mode here.
Audio Input
Select the Audio Input here. By default the option “Auto” “Auto” is selected and with this option the same input as for video is used. By selecting “SDI” “SDI” you can choose between the available physical SDI inputs as audio input option for this Channel.
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Audio Input option “SDI”“SDI”: When using this option, it is possible to distribute the incoming audio of SDI Input1 to all other Channels. Please beware that the incoming video streams have to be synced correctly before. We recommend to use Frame Stores for such recording workflows. Please beware that there is a special use case, when using a JIL8 server. Here you have to use Input1&5 to distribute the incoming audio to all other channels. This is unfortunately a limitation of the video device. |
Chunk Length
Set the Chunk Length here. The maximum is 12:00:00:00. Default setting is 02:00:00:00.
Port
Edit the Channel Port here.
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This queue is for caching the encoded frames, before they get written to the destination(s). This queue size sets the limit for the “Storage “Storage too slow” slow” error message as well. So when this queue is getting full, you will see an error within just:control’s Channel Viewer Window and it is an indication for I/O speed problems to the storage.
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Video Encoder Threads
With the Video Encoder Threads setting you can adjust how many CPU cores the Channel will use for the encoding process. This setting was especially designed for multi-channel UHD recording. Please only change this setting, after consulting a ToolsOnAir Support Engineer.
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This setting adjusts the internal Frame Buffer of each individual AJA input source. This setting was designed to improve the stability and performance for UHD recording workflows. Please consult a ToolsOnAir Support Member, before changing this setting.
On Color Space Change
The “On “On Color Space Change” Change” setting can be used to define the action in case of a color space change of the incoming signal while recording. By default this is set to stop the recording, but it can be adjusted to start recording into a new file. Normally there should be no change in color space while recording, but in case there is, this setting can be used to adjust the channel behaviour.
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Please beware that just:in linux keeps writing to a MXF, MP4 or MPEG TS container in case of a color change while recording, even if the option “New Container” “New Container” is selected, as this is supported by the container format. |
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This option is enabled by default, when using an AJA Video Device and can not be turned off. This setting makes sure that the Channel gets restarted automatically, if there is a signal loss while the Channel is in idle mode (=not recording).
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Please do not use “Close container, write to new” as option for Signal lose signal loss cases, when you are planning to use the Schedule Mode. |
Close container and stop: Recording container(s) will be closed and channel stops recording.
Write black frames: Black video frames will be added to the Recording container(s), while there is no signal. Recording continues.
Duplicate last valid frame: The last valid video frame will be duplicated to the Recording container(s), while there is no signal. Recording continues.
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This setting can be used to pin the Channel to specific CPUs, in order to gain performance improvements.
Capture Thread
The Capture Thread setting defines a specific CPU core for loading the video frames from the AJA capture device to the OS. This setting is important for cases, where the Channel dropped frames.
Write Thread
The Write Thread setting is similar to the Capture Thread setting and is used for setting a specific CPU core for handling the I/O process (=writing to the destination(s)).
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Resolution: two resolution options are available:
High: 640x360px
Low: 480x270px
Frame rate: the preview frame rate can be changed between 0 (=native framerate) and 30 (if the channel framerate is higher then 30, then the preview will be limited to 30fps).
Quality: can be changed between 10 and 100% (Default value is 50%).
NDI®5
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An NDI®5 Input Channel looks similar to a SDI Input Channel. Such an Input Channel misses of course the Video Device related settings and it has one NDI NDI®5 related setting which will be addressed below.
Allow conversion from different modes and/or frame-rates to the above video mode
In general a Video Mode has to be selected for a NDI®5 Channel, which is important for the actual recorded files of that Channel, as the Video Mode setting defines the output format.
Please beware that Capture Preset can change the output format again, if that is the indented behaviour of such a Preset. Normally a Capture Preset follows the Video Mode setting.
With the “Allow conversion from different modes and/or frame-rates to the above video mode” setting, you can make sure that the incoming NDI®5 stream gets converted to the given Video Mode. Which This means that, that an incoming NDI®5 signal in the format of 1080i2997, will be converted to 1080p25 (Video Mode), if this setting is enabled.
When this setting is disabled for a NDI®5 channel, then you will see a No Signal “No Signal” Error Message within just:control Just Control, when the Channel switches to a NDI®5 Channel, which does not match the actual Video Mode of the Channel.
SRT (Secure Reliable Transport)
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In general a Video Mode has to be selected for a SRT Channel (same as for NDI®5 Channels), which is important for the actual recorded files of that Channel, as the Video Mode setting defines the output format.
Please beware that Capture Preset can change the output format again, if that is the indented behaviour of such a Preset. Normally a Capture Preset follows the Video Mode setting.
Allow conversion from different modes and/or frame-rates to the above video mode
With the “Allow “Allow conversion from different modes and/or frame-rates to the above video mode” mode” setting, you can make sure that the incoming SRT stream gets converted to the given Video Mode. Which means, that an incoming SRT signal in the format of 1080i2997, will be converted to 1080p25 (Video Mode), if this setting is enabled.
When this setting is disabled for a SRT channel, then you will see a No Signal “No Signal” Error Message within just:control Just Control, when the incoming signal/stream does not match the selected Video Mode.
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You can add or remove NDI®5 or SRT Channels at any time. Open the Just Control Configuration Panel and select one of the connected just:in linux devices. Then use add the Plus (“+”) button to add a NDI®5 or SRT Channel.
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Then a new window appears, where an IP-Address and Port are already entered. Make sure that this IP-Address matches the just:in linux IP-Address and press the “Add” button.
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If the IP-Address is wrong here, please adjust it and contact us. We will then try to remote into the machine and check what is going on with the network settings. |
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Once the new Channel is added, you can adjust the settings and enable it, so that you can use it within Just Control. To delete a Channel, select the Channel within the “Devices & Channel” list and press the “Minus” button.
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Please note, that only NDI®5 or SRT Channels can be removed from a Device. |
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Channels can be removed only, if they get disabled/stopped before. |
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After changing the settings of a Channel you have to enable it again by clicking on the corresponding checkbox. You can only activate Channels with valid Video Modes.
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Once the channel Channel is activated/enabled, it will be available in the “Connections-Tab ” tab within the Inspector. To change Channel Settings deactivate the desired Channel(s) by unchecking the corresponding checkbox(es) on the left side of the Config Panel Just Control Configuration panel.
Please note, that Channels can be stopped/disabled only, while they are in idle mode (not recording).
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Deactivating/Stopping a Channel will make it unavailable in connected just:control User Interfaces Just Control user interfaces and the channel Channel will disappear from the Channel List within the “Connection Tab ” tab in the Inspector as well. |
UHD Channel Input Modes
As mentioned in previous chapters, just:in linux is capable of working in different UHD Channel Input Modes. This page will focus on the configuration of such Channels and how to use them.
AJA 4x4K-Quad
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AJA 4x4K-Quad
AJA 4K-2SI
Both Channel Input Modes are supported by just:in linux. In order to set up one ore multiple Channels in that way, open the Just Control Configuration Panel panel in Just Control and make sure all available SDI Input Channels are disabled, so the settings can be adjusted.
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Channel Input Modes can be mixed as well. |
Select Channel SDI 1 and select SDI (AJA 4x4K-Quad) as Input Mode, then select a UHD Video Mode, such as 2160p50. Note that the Input setting is set to Input #1 in that case, that is very important, as in this special Input Mode four physical SDI Inputs will be used to create the Channel (Input 1-4 will be used for Channel 1 and Input 5-8 will be used for Channel 2). Next enable Channel SDI 1 and SDI 5 and move back to Just Control.
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Channel Inputs 2-4 and 6-8 can not be used for other Channels. Please note that it is possible to set up the Device in a UHD config only and therefore other Channel Inputs can not mistakenly be used. |
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With the same way (as above) you can set up Channels in AJA 4K-2SI Channel Input Mode. Please remember that this Input Mode is using four 3G-SDI Inputs for one Channel as well.
AJA 12G
With the SDI (AJA 12G) Channel Input Mode a single 12G-SDI Input can be used for a single Channel. This Channel Input Mode works the same way as HD Channels.