Video passthrough
Hardware video path, input format detection and automatic recovery after hotplug or resolution changes.
TVI · TV Insert
TVI: the right time, directly on live video
TVI is a compact OSD inserter that overlays clocks, timers and timecode onto a pass-through video signal. The video path remains in hardware, while every overlay detail is controlled from a lightweight web dashboard.
Video in, video out, timing over video.
Hardware passthrough
NTP and SMPTE LTC
Dashboard web
Automatic recovery
Hardware video path, separate OSD
A reliable time reference without burdening the video workflow
Many software overlays re-encode or retransmit the video. TVI keeps the signal on the system's hardware path and renders the OSD on a separate plane. The result is a low-latency solution that is easy to control and designed for continuous operation in control rooms, studios, live events and technical installations.
Clock, timer, countdown, up-counter and timecode can be positioned and customized without interrupting the program. If the format changes, a hotplug occurs or temporary instability is detected, dedicated watchdogs automatically rebuild video, audio and overlay services.
Explore web control
Always-readable overlay
Configurable style, position and content
Key features
Everything you need to put timing on program video
Customizable OSD
Digital, analog or flip clock with optional date and label, plus adjustable font, color, background, opacity, size and position.
NTP and SMPTE LTC
LTC decoding with automatic FPS detection, forward/reverse, drop-frame, color-frame and user bits, plus NTP fallback if lock is lost.
Remote control
Web dashboard, HTTP API and UDP commands for integrating TVI with browsers, touch panels, automation and control-room systems.
- ✓ UP/DOWN timer, countdown and timecode
- ✓ Fully adjustable position and style
- ✓ Instant panic control to hide the overlay
- ✓ Audio passthrough with dedicated watchdog
- ✓ Broadcast formats up to 1080p59.94
- ✓ Optional LTC output from NTP or loop-through
- ✓ Status, heartbeat and resync via API
- ✓ Persistent local configuration
Video demonstration
See the overlay on a live signal
Two real examples show the clock and timecode overlaid on program video.
Live clock
Time displayed over the video with a high-contrast background and continuous updates during playback.
Frame-accurate timecode
A complete time reference including frames, designed for production, technical monitoring and operational synchronization.
Dashboard web
Open, configure, put it on air
From a browser, you can control OSD visibility, style, position and content in real time. The panel also includes NTP/LTC source selection, LTC testing, network configuration and UDP remote control for timers and displays.
- Live control: show, update or hide the overlay without interrupting the video.
- Flexible styling: choose the mode, theme, colors, font, date and label.
- Integration: control the same functions through HTTP APIs or UDP commands.
- Operational safety: use the panic control to hide the OSD immediately.
The device
Designed for professional installations
Technical specifications
The TVI platform
The reference software platform runs on high-performance embedded hardware, with independent services for video, OSD, audio and control.
Hardware platform
High-performance embedded solution
Operating system
Ubuntu 24.04
Video
Reference platform: HDMI-RX, HDMI-TX and hardware-plane passthrough
Main formats
576i50, 720p50/59.94, 1080i50/59.94, 1080p23.98/25/29.97/50/59.94
Overlay
Separate BGRA renderer on the video plane through GStreamer
Time and timecode
NTP/system clock, SMPTE LTC input and optional GPIO LTC output
Audio
HDMI passthrough with dedicated routing, A/V synchronization and watchdogs
Control
HTTP dashboard on port 8000, FastAPI API and remote UDP commands
Configuration
Local persistence in settings.json and environment variables
Applications
Built to work wherever timing matters
Control rooms and studios
Clock and timecode always visible on the program monitor.
Live events
Controllable countdowns and timers during live productions and streaming.
Installations
Continuous time reference with automatic recovery.
Test benches
Technical monitoring of signals, timecode and video formats.
Bring TVI into your workflow
Open the dashboard, choose the style, put the OSD on air.
Tell us about your system and we will help you identify the most suitable configuration and integration.
Frequently asked questions
TVI at a glance
A digital or analog clock, flip clock, date, labels, timers, countdown,
up-counter and timecode.
From a web dashboard on the local network, through HTTP APIs or with UDP
commands compatible with remote devices.
The NTP-synchronized system clock or an SMPTE LTC signal, with automatic FPS
detection and NTP fallback if lock is lost.
Dedicated watchdogs monitor video, output, audio and memory, automatically
rebuilding the required services.