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Synchronize two brightsigns to play on very large LED wall beyond 4k resolution

I have an LED wall that I will be installing with a resolution of 6144x1512. This is beyond the resolution capable of a single brightsign. In the past, I have run multiple brightsigns synchronized to play a looping video. It looks great on several monitors positioned side by side. But I have concerns that I will encounter issues if I were to attempt to link two brightsigns to play on a single LED wall. There's no seperation so any flaw in playback will be visible. Am I likely to experience any artifacts such as tearing or slight sync issues? Has anyone else run a display that requires multiple brightsigns to cover the pixel space?

There are other options available to make sure I can play media beyond 4k. I could always run a Disguise media server for this, but that solution is less reliable for a long term install, and would be much more expensive.

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    Bert Ra

    Hello. 
    I would not recommend to implement this with multiple players. The sync between the devices is not that exact. I have tested this myself with XD players, despite advanced sync being switched on, the devices are out of sync at some point.

    If it unfortunately doesn't fit here because the amount of pixels of your LED-Wall exceeds 4K DCI, for many other applications you could rearrange the content so it fits into the pixelspace of 4K. Either you ask the content creator to do this. Or you can use a program like ffmpeg, see example. Best way for input is a image sequence in this case to avoid second times compression.

    .\ffmpeg  -i inputfile.ext -filter_complex "[0:v]crop=2560:512:0:0,pad=3840:512:0:0[left]; [0:v]crop=2560:512:2560:0,pad=3840:1648:0:0[right]; [left][right]vstack" -c:v libx265 -x265-params bitrate=30000:vbv-bufsize=10000:vbv-maxrate=35000:crf=0:bframes=2 -pix_fmt yuv420p output.mp4

    In your case, however, the amount of pixels exceeds the resolution of 4K DCI, so this solution does not fit here. 

    Maybee there is also worth a look using the newer XC series from Brightsign with multiple hdmi outputs. 

    EDIT: Ok, XC and XT Series are worth a look. It seems, with this units are resolutions 7680x4320 @60p possible. See also here: https://brightsign.atlassian.net/wiki/spaces/DOC/pages/370676833/Supported+Video+Modes

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