Stuttering as video gets towards end on XT1144

Got 4 XT1144's playing .MP4 4k 60FPS @ 60Mb/s bit rate. The video is around 1:30:00 in length and is set up to loop after it finishes. I have set it up as one master and 3 slaves that all sync up. One of the slaves, as the video continues on, progressively gets more choppy and stuttery. By the end of the video it is probably playing 3 frames per second. On the loop event however, everything goes back to being smooth until the video goes on. 
My question is wondering if this has something to do with the player itself malfunctioning, the microSD not being able to read fast enough, or something along those lines? Would I just need to re-publish the file and maybe something happened during publishing?

The other players handle the video fine. 

Any tips would be great, 


  • 0
    Allen H. Porter

    Is that player being powered using POE?  Turn POE off and use the wall-wart power supply that came with the player.


    Run the video from one of the other slaves and see if it does the same thing.


    Run the suspect video on one of the other slaves.



  • 0
    Monica Knutson

    Sounds like a microSD card issue.  Are they all Class 10 cards or higher?  We have found some brands may say Class 10 but they are skitchy.  Try a new card and see how that works for you.  Tech note for SD cards.

    If the file is over 2GB, format the cards as exFAT.


    You're well within the spec for the video codec:

    XTx44, XDx34, HDx24

    4K Video

    • Video Codec: H.264, H.265, or VP9
    • Resolution: The maximum supported resolution is 3840x2160x60p or 4096x2160x60p.
    • Color Depth: 4K video can be encoded at 4:2:0 subsampling with 8 bits (Main Profile) or 10 bits (Main 10 Profile) of depth.
    • HDR and Dolby Vision: XTx44 players support both HDR10 and Dolby Vision.
    • Display Hardware: The maximum supported framerate and color depth are also affected by your display hardware. See this section of the 4K Video Encoding tech note for more details. 

    NoteBrightSign players support both H.265 version 1 profiles: Main and Main 10. However, we do not support the recently ratified version 2 profiles.

    • Container Format: The following container formats are supported: .ts, .mov.mp4, .mkv, .webm.

    Note: XTx44/XDx34 models currently support .webm video with the Opus audio codec (not Vorbis), while HDx24 models support .webm with the Vorbis audio codec (not Opus).

    • Bitrate: The XTx44 and XDx34 models support a constant bit rate (CBR) between 70 and 80 Mbps. These values apply to both the primary and secondary video decoders.
    • Merge Mode: If you are using B-frames as references in H.265 “merge mode”, the size of the references list should be limited to two or less.
    • Audio Support: AAC audio (CBR/VBR) up to 288Kbps

    Note4K video must be played from a Class 10 SD card.

    HD Video

    • Supported Codecs: H.265, H.264, VP9, MPEG-2
    • Resolution: The maximum supported resolution is 1920x1080. Note that some supported VESA video modes have limitations, as outlined in this FAQ
    • Supported Extensions/Containers.ts.mpg.vob.mov.mp4.m2ts

    Note: .mov files with compressed "atoms" (i.e. metadata) are not currently supported. 

    • Additionally Supported Extensions: Players also support .webm video with Vorbis audio (the Opus audio codec is not supported).
    • Specs for H.265 Extensions/Containers: Support for Main and Main 10 profiles up to level 5.1
    • Specs for H.264 Extensions/Containers: Support for Main and High profiles up to level 4.2
    • Maximum Recommended Video Bit Rate: 25Mbps
    • Audio Support: AAC audio (CBR/VBR) up to 288Kbps


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