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_Decoder Settings_MX4D


StreamNoneSelect the stream from the drop-down list of available streams. See Configuring Decoder Streams.
SDI Outputs


Select the SDI (BNC) output port(s) for the decoder. 


You can route the decoded video and audio to any set of physical outputs. This allows you to specify the interface(s) on which you want to see the video. A single decoder can output to one or more SDI outputs. See Configuring Decoder Settings

Quad ModeNormal

(All four SDI outputs must be selected for the decoder) Outputs a UHD (Ultra High Definition, 3840 x 2160) stream split into four 3G signals. Each of the four 3Gb/s HD-SDI links transmits a quarter of the video to be displayed as a full UHD image. These four signals are then combined to create a composite UHD resolution image that runs at 12Gb/s. 

Select the method to split the pixels:  

  • Normal – Outputs the video as individual outputs, i.e., outputs four times 4k.  
  • 2SI Mode – Outputs the video using two sample interleaved (2SI) reduced resolution (as per SMPTE 435). Groups of two pixels are separated from the image and sent on four different links. 2SI puts the two first samples of the first line on link A, then the two next in link B and repeats this process over line 1. Then line 2 of the picture is divided exactly the same but put in links C and D, and identically for even and odd lines alternatively. 


NameN/A(Read-only) The Name of the selected input stream.
ResolutionN/A(Read-only) The input signal detected from the incoming video stream. It includes the number of pixels per line, and whether the video is interlaced or progressively scanned (indicated by i or p).
AudioN/A(Read-only) The sampling rate of the incoming audio signal.
Drop Corrupted FramesDisabled

Check this checkbox to enable dropping of corrupted frames at the demuxer to prevent the decoder from attempting to process partial or corrupted frames.



The type of buffering to use. A jitter buffer temporarily stores arriving packets in order to remove the effects of jitter from the decoded stream.

  • Automatic: Automatic mode favors smooth playing content with good synchronization between audio and video. The incoming stream is monitored and the optimal required delay is determined so that stream packet and video picture jitter is absorbed. The calculated delay may change slowly as network and video conditions change.


    The added delay will not decrease with time even if the video jitter disappears.

    The added delay depends on the monitored video jitter. It also depends on the audio arrival time; if the audio is late, this delay will be added to the current calculated delay. For example, if the audio is late by 500 ms (vs Video), an additional 500 ms delay will be added to allow the Audio/Video synchronization.

  • Fixed: Fixed mode allows users to specify a delay to be added to the decode pipeline after the content is decoded. The amount of delay does not vary and artifacts may result if a too low value is used. (See "Delay (Fixed Mode)" below.)


    The decoder has a minimum buffer set based on the resolution and frame-rate of the stream content. In addition, users can add more delay if desired: (1) to achieve a specific decoding latency for inter-channel synchronization purposes; (2) to deal with unusually large amounts of jitter in the stream; or (3) to allow A/V sync to occur when the stream content is highly out of sync.
  • MultiSync: Use to synchronize the content across multiple channels to within one frame period. This is designed to allow down-stream equipment to switch smoothly between video and audio sources. You need to set the "(MultiSync) Delay" on all of the decoder channels to the same value. For the steps to configure multi-channel sync on a Makito X or Makito X4 Series encoder and decoder, see Multi-channel Synchronization.

Delay (Fixed Mode)

0 ms

The delay in ms when using buffering in Fixed mode. Range = 0…3000 ms


The maximum delay is 2000 ms. If for any reason the system requires more than this value to play smoothly, video or audio artifacts will be noticed.

Delay (MultiSync Mode)1000 ms

The delay in ms required to ensure that two or more decoder channels are synchronized. Range = 0…10000 ms


The difference in the values between the decoder channels cannot exceed 2000 ms.


Output ResolutionAutomatic

The dimensions of the frames (width and height) to send to the display with an indicator (i or p) whether the video is interlaced or progressively scanned.

  • Automatic: Allows the decoder to choose a suitable display format based on the stream parameters and the connected display's capabilities.


    Attempts to up/down-scale incoming video that is not supported to a nearest or best matching supported resolution.
  • Native: The display format chosen is always the same as stream's encoded format regardless of the connected display’s capabilities. If the stream's encoded format is supported as a display format, the display shows video in that format. Otherwise, no video is displayed. Statistics show the format in which the video is encoded.

  • TV Resolutions: 1920x1080p…720x480i
  • Computer Resolutions: 1920x1200… 640x480
Output Frame RateAutomatic

The frame rate per second generated for the displays:

  • Automatic: The decoder will select the best display frame rate based on the stream parameters and the connected display's capabilities.
  • 75, 60, 59, 50, 30, 29, 25, 24 or 23


If Automatic is selected, the actual frame rate generated will be the next highest valid frame rate supported by the SDI and HDMI interface, plus the one that gives the best decimation factor. For example, 30 Hz could be chosen instead of 29.970 Hz.
Still ImageFreeze

This setting controls what the decode channel outputs when the decoder is not receiving a video stream (e.g., a stream is stopped (at the encoder) or the network connection fails). A still image is inserted on the output SDI interface having the same resolution and frame rate as the last decode picture of the last stream. The options available are:

  • Freeze: continues to display the last decoded video frame.
  • Black: displays a black screen.
  • Blue: displays a blue screen.
  • Color Bars: displays a series of vertical color bars across the width of the display.
  • Mute: disables the video output.
  • Select Image: opens a dialog for you to select a custom Still Image.
    Additional custom images may be uploaded by an administrative user. For details, see Configuring Still Image Streaming.


When the Still Image is substituted on the display outputs, the video frame rate and resolution will be maintained.
Still Image Delay3

The delay in seconds before the still image is displayed. Range = 1…1000 seconds


Until the selected still image is displayed, the output will freeze.

Dynamic Range


(10-bit Chroma Subsampling must be selected) Select to configure the decoder to detect the inbound High Dynamic Range (HDR) transfer function signaling and forward that information within the decoded stream.

  • Off (Standard Dynamic Range (SDR)/BT.709)
  • Automatic: the decoder detects HDR transfer function from the encoder
  • HDR-HLG: HDR content is based on the Hybrid Log Gamma (HLG, BT.2100) transfer function
  • HDR-PQ: HDR content is based on the Perceptual Quantizer (PQ, SMPTE ST 2084/BT.2100) transfer function

Decoder parameters showing Dynamic Range drop-down

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