Teradek Serv 4K firmware
Teradek · Serv 4K · Video
Latest firmware for the Teradek Serv 4K is v2.25.20260526 (June 3, 2026).
Changelog
Serv 4K firmware changelog
Firmware history
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Teradek Serv 4K Firmware Version 2.25.20260526
New Features
- Added controls for starting/stopping all Core and Cloud linked streams from the device
Changes and
Improvements
- Keep ordering consistent when exporting user settings
- Added license information to exported settings
Bug Fixes
- Devices could not connect to Core on some networks
- Modems did not connect when used with Teradek Data set to Carrier Lock mode
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Teradek Serv 4K Firmware Version 2.25
New Features
- Added REST Settings API, includes the following:
- Full stream configuration, status, and control
- Encoder configuration
- Recording control
- Endpoint for users to request high/adjustable quality snapshot images
- SCTE message insertion
- OAuth authentication
- Documentation at teradekdev.com
- Added additional interface priority and bandwidth limit options for UDP protocol Teradek Cloud/Bonded streaming
- Added device configuration import/export functionality
- Allow users to configure web UI session timeout or disable it
- Added Settings Sync API to push configuration directly to LAN devices
- Added option to upgrade device using a firmware image URL
Changes and
Improvements
- WebUI displays if discovered wifi networks are 5GHz or 2.4GHz
Bug Fixes
- Fixed some intermittent Core API connection stability issues
- Fixed network routing initialization to better support multi-VLAN environments
- Some system utilities would restart periodically when connected to a network with no internet connection
- Fixed file duration display for segmented recordings
- Mac-generated PNGs could not be uploaded for use with pattern generator
- Some SIMs would not connect automatically without manually adding APN configuration
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Teradek Serv 4k Firmware Version 2.24
New Features
- Added USB audio input support
- Added real time file upload support for Core, S3 file sync
- Added selection between Sequential and Parallel file uploads for Frame.io
Changes and
Improvements
- Added read permissions for all groups/users to recorded files
- Improved web UI mobile compatibility
- Band selection for custom modem configuration is saved when switching between Auto & Custom
- Improved network uplink detection when connectivity is poor
- Added support for throttling of status information between devices and Core
- Added support for hostname registration via DHCP
- Enter key now works to apply EAP network settings
- System processes are restarted if a firmware upgrade is interrupted or fails before reboot
Bug Fixes
- Unplugging ethernet cable could disrupt other active network connections
- Mac-generated PNGs could not be uploaded to use with Pattern Generator or OSD
- HEVC MP4s did not work in some players - Changed HEVC Codec ID header to hvc1 instead of hev1
- SD card could not be accessed if formatting was done too soon before recordings were started
- Upload entries were duplicated on Frame.io for files recorded while offline
- Recording utility could restart when uploading multiple files simultaneously
- In progress recording uploads could not be manually stopped
- Corrupt recordings could prevent media information from loading
- Disabling the Core file sync toggle would stop recordings
- File browser did not display files mounted via NFS correctly, files could not be downloaded
- NFS drives sometimes failed to unmount
- Codec restarted when attempting to record to offline NFS drive
- Recorded files had no audio track when Audio codec was set to AC3
- Diagnostics report did not contain 'defaults' file
- PAP SIM authentication did not work for some carriers
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Teradek Serv 4K Firmware Version 2.23
New Features
- Added failover test pattern generator for Next Gen codec mode
- Added ability to manually upload files to Core and Frame.io
- Added Next Gen codec mode to Serv 4k
- Added OpenVPN support
- Added customizable uplink checking
- Added setting to device to force VUER and TTV apps to display watermarks
- Added Ethernet Link Speed selection
Changes and
Improvements
- Removed Standard encoder mode, device settings will be migrated when upgrading from 2.22 or earlier
- Restored Min/Max QP in advanced settings
- Added device host name/serial number to login page
- Front panel record indicator now blinks when recording
- Greatly improved file upload robustness when connectivity is lost or slow
- Added user notification if Frame.io authorization fails
- Allow user to configure camera type (for fan control) without recording enabled
- Interval recording suffix number now increases beyond the configured max files number
- Node Band Selection options are all enabled by default
- Added reference guide link to web UI
- Disabled device history feature
- Recordings use local date and time instead of UTC
Bug Fixes
- Core file sync and Frame.io C2C uploads could fail if the network uplink changed while uploads were in process
- Serv4k could start recording without user input if video input changed
- Serv Micro: Adaptive Bitrate Settings didn't take effect until video was restarted
- Manually Adding Wi-Fi networks failed due to an invalid password message
- Connecting to WPA Enterprise networks from web UI when switching directly from AP mode didn't work
- Overlay editor did not show video preview as background
- Overlay editor did not display previously configured overlays
- Web UI was causing increased browser memory usage
- Web Interface reloaded unnecessarily after connecting to OpenVPN server
- Ethernet was not initialized correctly when connecting to non-gigabit ethernet equipment
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Teradek Serv 4k Firmware Version 2.22
New Features
- Added auto join call toggle for Core Comms
- Added full device configuration to front panel for devices with 5-way joysticks
- Added WPA Enterprise WiFi Support
- Added support for multiple DNS servers in DHCP and static IP modes
- Added OpenVPN Client to Prism encoders/decoders
- OpenVPN network configuration can be used to provide VPN access to hotspot-connected devices
- Added File sync for Teradek TV
- Added support for syncing device diagnostics with Core for quicker support
Changes and
Improvements
- Updated web UI design and reorganized configuration pages to improve usability
- Added a default web UI password and disabled auto-login
- See https://guide.teradek.com/a/1530201-power-and-connect#access-the-web-ui for details
- Strong passwords are required when changing web UI password
- Strong passwords are required for stream auth passwords
- Core file sync setting is preserved when logging out and back into Core
- Added Encryption and password protection to diagnostics reports
- Added "defaults" item to diagnostic report showing all changed values from factory defaults
- Rearranged System Setings page and split into two sub-pages - Settings & Maintenance
- Added rate limiting for failed login attempts
- Added inactive/idle session timeout to web UI
- Added support for CSRF tokens
- Added access control to diagnostic file downloads
- Updated web server version
Bug Fixes
- Analog audio selection was not applied after switching from embedded to analog
- WiFi could disconnect/reconnect occasionally on some networks
- If track 1 is disabled when Enabling Multitrack Audio, other tracks were not transmitted
- Core Comms join call operation sometimes failed on initial connection
- Continuous recording uploads did not work with FAT32 formatted media
- When recordings are split at 4GB only the last segmant was uploaded
- Headphone loopback was muted when audio input is set to analog
- Web browser memory usage increased over time with Web UI open
- Event history sometimes failed to populate
- Fixed recorded file playback in web UI
- Node 5G-SW: For Verizon SIM, Sierra Wireless was using the default APN instead of custom APN
- eSIM modem configuration "Auto" did not work
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Teradek Serv 4k Firmware Version 2.21
New Features
- WiFi Hotspot is now available -- Wi-Fi can be used to share device's Internet connectivity
- Added option to enable sidecar metadata file with recordings
- Added "AWS S3" Cloud Service for recording file upload sync
Changes and
Improvements
- Fan now turns off while recording in camera-triggered mode
- License entry field now allows right-click to paste
- Added support for multiple network interfaces connecting to the same subnet
- Remote app access can now be disabled (See System Settings)
- Various security updates/improvements
- Ethernet static IP can be configured via front panel on devices with directional joystick
Bug Fixes
- Failover generator didn't start if encoder was booted with no video and resolution/bitrate were set to Auto
- Video encoder didn't start if source is connected after bootup and resolution/bitrate were set to Auto
- Front panel interface could freeze if recording was enabled with no media selected
- Fixed audio stream drops when Audio Bitrate is configured at or above 512kbps
- Audio Bars on WebUI were not updated based on Audio Channel Selection
- Recorded file browser created file downloads with other clips' names
- Deinterlacer could cause poor video quality
- Fixed Interlaced HEVC encoding to improve video quality
- Switching between saved Wi-Fi networks did not always work correctly
- Wi-Fi connection dialog did not always disappear after connecting to a network
- Name server and domain were sometimes not configured when connecting to Wi-Fi
- Wi-Fi AP advertisement was publishing incorrect security mode
- Core firmware check would display "Checking" until device's local web UI was loaded
- 0 in wildcard of RED clipnames was saved as open bracket [
- Stopping a recording from a camera while recording is "Waiting" would trigger another recording
- Serv 4K V2 shows up as Prism Flex in Frame.io
- Custom modem APNs were not being saved correctly
- Add account button for stream presets was displayed even after configuring the account
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Teradek Serv 4k Firmware Version 2.20.20240614
New Features
- None
Changes and
Improvements
- Improved Core control connection stability
- Show currently connected interface for Core ccontrol
- Add support for multiple network interfaces connected to the same subnet
Bug Fixes
- Core control connection would restart when changing network interfaces
- Core control connection would not initialize if highest priority network interface had no uplink
- Wi-Fi network configuration sometimes failed to start correctly on boot
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Teradek Serv 4k Firmware Version 2.20
2.20.20240408 Changes
- Failover generator did not start on bootup if encoder resolution and bitrate were set to auto
- Encoder did not start properly if booted with no video and encoder resolution and bitrate were set to auto
- Camera triggered recording for Canon cameras with clip name metadata was not working correctly
- Added additional hardware revision support
New Features
- Added Moxion file sync platform support
Changes and
Improvements
- Improved Wi-Fi adapter reliability
- Removed Wi-Fi 5 option -- no longer needed
- Changed Teradek Data labels
- Various modem connection improvements
Bug Fixes
- Streams from 1080i50/59.94 video were limited to 25 or 30 fps
- Network connections were not initialized correctly when switching between two different valid Ethernet or Wi-Fi networks
- Fixed issues with network connectivity when connected to multiple networks with the same subnet
- USB drives were sometimes not mounted after a reboot
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Teradek Serv 4k Firmware Version 2.19.20240122
New Features
- None
Changes and
Improvements
- None
Bug Fixes
- Short recordings were sometimes not uploaded to Frame.io
- RED camera triggers could cause multiple recordings to be generated for the same clip
- Node modems with some Teradek Data SIMs were not detected correctly
- Recorded files were sometimes not displayed
Teradek Serv 4k Firmware Version 2.19
New Features
- Added firmware upgrade support for internal and external Node II modems
- Added multi-track audio support to recordings
- Added support for Serv 4k (2024) with D-Pad
- Added ability to link to Teradek TV from front panel
- Added ability to link to Frame.io from front panel
- Added additional Teradek Data (LT, Japan) options
- Added BLE (Bluetooth) support for basic network configuration via Serv app
- Added Auto Start option for RTMP stream mode
- RTMP streaming is now license activatable on Serv products
Changes and
Improvements
- Added Teradek TV status to front panel
- Cloud synced file uploads (Core, Frame.io, etc.) are now uploaded in order of creation
- Added additional detailed modem status information
- Improved Core Comms statuses
- Changed default rate control mode to Fast Adaptive Bitrate
- If USB Headset is selected, it must be connected in order to join Core Comms call
Bug Fixes
- Audio input did not change when switching input between HDMI & SDI
- PIX upload/authentication could fail intermittently
- Network routing did not update correctly when interfaces were connected/disconnected, resulted in 'No Uplink'
- Devices would not connect to Wi-Fi networks on boot if connection took more than a few seconds
- Recording media sometimes failed to mount correctly
- Node II sometimes failed to connect to mobile networks
- Auto Colorimetry was setting bt.2020 for HD SDR inputs, 8 bit encoder. Caused some players to display colors incorrectly
- Web UI could cause client browsers' memory usage to increase over time
- Stream audio was silent if a negative lip sync value was set
- Frame.io real time uploads slightly larger than 1 part (5.25MB) would fail to upload
- Frame.io Offline recordings could were being deleted from upload queue without any method to resume
- Timecode counter/OSD was incorrect for 1080PsF 23.976
- Overlay was disabled when switching from HD to 4K input
- WebUI did not refresh after a Factory Reset
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Teradek Serv 4k Firmware Version 2.18
New Features
- Added Teradek TV support - Teradek's new cloud review platform for live feeds and remote collaboration
- Added Core Comms - Talkback and collaboration between devices and apps
- Added Real-time upload support for Frame.io C2C
Changes and
Improvements
- Many system/stream stability
improvements
- Added per-interface streaming bitrate status
- Added additional hardware revision support
Bug Fixes
- Adding/removing audio tracks didn't take effect until other settings are changed
- Remove Entropy Mode & Audio Codec Setting from WebUI
- Some system utilities would restart unnecessarily
- Booting encoder while connected to an actively-recording camera prevented files from being generated
- ALEXA 35 clip name was not detected for recordings
- Frame rate calculation for 23.976fps was incorrect for recorded files
- External media capacity status did not update dynamically
- Core and other cloud platform authorization could be lost without user deleting it
- Factory Reset did not reset WebUI Password
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Teradek Serv 4k Firmware Version 2.17
New Features
- Added Node 5G support
- Added bonded file upload support for Frame.io, Sony Ci and Sony C3P
Changes and
Improvements
- Improved Bond Adaptive Bitrate algorithms
- Large buffers (>15 seconds) are handled better
- Reduce bandwidth spikes when dealing with connectivity dips
- Improve handling of network interruptions shorter than buffer size
- Improve streaming when buffer is small but nonzero
- Added Fast adaptive bitrate rate control setting for use with Bonding
- Hide timecode in encoder web UI if disabled
- Many Node modem connectivity
improvements
- Added option to disable modems from web UI
- Added PIX, Sony Ci, C3P statuses to front panel
- Embedded audio is muted when video generator is active
- Settings blocks are now collapsible in the web UI
Bug Fixes
- A/V sync could drift when the pattern generator was enabled/disabled
- Encoder would not start encoding generated picture unless video had already been connected
- DHCP lease renewal could cause short interruption in network stream and Core connection
- Serv 4K could not connect to Wi-Fi or show saved networks if 'Connect to saved networks' was disabled
- FS7 Clipnames occasionally saved using the previous name
- Home directory was not shown in Core file sync directory listing
- Recordings are not removed from Recorded Files Page when "Deleting All"
- Event history was not always displayed
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Teradek Serv 4k Firmware Version 2.16
New Features
- Added Audio/Video failover pattern generator
- Added Sony C3P recording file sync support
- Added option to disable external cell modems
Changes and
Improvements
- Improved file upload reliability on unreliable networks
- Reduced modem connection times on startup and after configuration changes
- Added constant/variable bitrate toggle to encoder advanced settings
- Teradek Cloud stream settings are cleared when device is unlinked from Core account
Bug Fixes
- In progress file uploads were not always resumed when network connectivity changes
- Modems sometimes failed to connect after startup or configuration changes
- Codec sometimes needed to be restarted after disconnecting from Core
- Camera metadata was not captured on every startup with PsF or interlaced formats
- Sony Camera trigger mode did not work if no filename was detected
- Semicolon (;) and dollar sign ($) characters prevented recordings from saving
- Some recorded HEVC files started with 1 or 2 black frames
- Account integration IDs were not cleared properly when performing a factory reset
- Local stream did not work if percent (%) character was used in the password field
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Teradek Serv 4K Firmware Version 2.15
New Features
- Added support for Teradek Data SIMs
- Added Core account authorization to front panel
Changes and
Improvements
- Improved Status/Control updates between device and Core
- Various Recorded file browser UI
improvements
- Improve modem statuses, hide errors on initial connection
- Modem logs are now present in diagnostics
Bug Fixes
- Bonjour advertisements did not always start on boot
- Web UI would refresh unnecessarily if network connection was briefly interrupted
- Firmware upgrade would occasionally fail to start
- Fixed slow memory leak in recording functions
- Recorded files were not uploaded if the SDI clip name contained spaces
- Default filename was used for recording with HDMI sources even if another clip name was configured
- Recorded file timestamps were incorrect
- Cloud integration settings were not properly cleared after a factory reset
- Audio bitrate status used incorrect units
- Node II firmware version was not always displayed
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Teradek Serv 4K Firmware Version 2.13
New Features
- Added PIX recording file sync support
Changes and
Improvements
- Improved Core reconnection when connecting over multiple interfaces
- Enable file sync by default for 3rd party file sync integrations
Bug Fixes
- Fixed authentication settings for Node II
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Teradek Serv 4K Firmware Version 2.12
New Features
- Added support for recording to USB storage
- Added Recorded file browser for web UI download/playback of files stored on local media
- Added support for additional cell carriers that require manual APNs on enterprise networks
- Added additional SIM card statuses
- Added SIM card PIN support
Changes and
Improvements
- Improved networking performance, particularly for UDP and local wi-fi streaming
- Improved memory management, long term stream stability
- Improved system error handling and recovery
- Node V2 can now detect SIM card insertion/deletion without requiring modem to be power cycled
- Timecode accuracy for high frame rate video (30+ fps) has been improved
- Current detected timecode is now displayed in web UI status panel
- Added 'delete diagnostics' button when performing factory reset, diagnostics are preserved by default to aid with troubleshooting
Bug Fixes
- Encoders and decoders could fail to reconnect to Core after network or connection interruptions
- Node II could sometimes fail to connect to networks that required manual APN configuration
- Fixed issues with reading from local storage after formatting
- Static IP configuration was not reset when performing a factory reset
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Teradek Serv 4K Firmware Version 2.11
New Features
- Added support for Sony Ci file sync
- Added ALEXA 35 recording clip name support
- Added front panel 'home' screen with network, record, video statuses
- Added local event history page, contains persistent record of status and configuration changes
Changes and
Improvements
- Cell signal strength for Node v2 is now displayed in the web UI
- Reduce time between SDI record trigger and recorded file start
- Ensure recorded file frame durations are constant
Bug Fixes
- Recorded file timecode/framerate could be incorrectly calculated, caused timecode sync issues in some NLEs
- Timecode was sometimes incorrect or not present when recording from PsF input video
- Link local address was sometimes retained after connecting Ethernet cable on a DHCP-enabled network
- Camera clip names were not saved for recordings to NFS shares
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Teradek Serv 4K Firmware Version 2.10
New Features
- Added Core file sync - when enabled, recorded clips are automatically synced to your Core account
- Added HDMI record trigger support
- Added configurable recording filename wildcards
Changes and
Improvements
- Auto-select recording media when plugged in and no media is selected
- Additional record media handling
improvements
- Changed some stream colorimetry options, combined PAL and NTSC rec.601
- Factory reset can now be done separately for network and broadcast settings
Bug Fixes
- Devices would sometimes fail to reconnect to Core after network status changes
- Recordings were not triggered if record media was removed and reinserted
- Fixed issues that could prevent incomplete file uploads from resuming after device reboot or network reconnect
- Fixed incorrect filenames for auto-generated clips on 4GB+ recordings
- Fixed ~2 second delay in recording start for camera modes where correct filename is not received along with record start flag
- Duplicate Wi-Fi SSIDs were listed when scanning multiple times
- Could not connect to MacOS NFS shares
- Pasting entries into the web UI did not activate the Save button
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Teradek Serv 4K Firmware Version 2.7
New Features
- Added user-configurable video Color space and Color range settings
Changes and
Improvements
- Many system stability, memory usage
improvements
- Added support for 802.11r Fast Transition - devices intermittently couldn't connect to FT networks with previous firmware
- Removed account details from system logs
- Improved recording functionality
- Improved clip name reliability
- Improved timecode accuracy for different video formats
- Support recordings when clip name is not present in SDI
- Allow users to specify underscore '_' character in recording filenames
- Added user-provided certificate to web UI HTTPS authentication
- Disable mDNS stream advertisement if local streaming is disabled
- Add flag to mDNS stream advertisement if encryption is enabled
- Improved Core login/link UX -- don't require users to click Save before connecting to Core
Bug Fixes
- Frame.io account authentication could be removed without user input
- Encoder streams did not always work after network configuration was changed
- Web UI was inaccessible if some system components restarted
- Timecode did not work correctly for 1080PsF resolutions
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Teradek Serv 4K Firmware Version 2.6
New Features
- Initial Serv 4K Public release
- 4K HDR support for local and Core streaming
- Support for Frame.io
Changes and
Improvements
- None
Bug Fixes
- None
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