Media Server › Features › TV and IPTV outputs
From the internet to TV equipment, and back
Unda speaks the transport streams that broadcast and IPTV equipment uses. Take channels in from encoders and satellite receivers, pick channels out of multi-channel feeds, and send standard SD and HD channels to multiplexers, modulators, set-top boxes and partners.
Bundle channels into one transport stream
Build a bundle in the dashboard: give it a destination and a total bitrate, add channels, and Unda sends them as one multi-program transport stream with names, IDs and tables in place.
- Up to 8 bundles, each with up to 32 channels
- DVB channel and provider names, fixed IDs that survive a restart
- Now and next in the programme guide for 24/7 channels
- Constant bitrate for modulators, or variable for IP links
- Black or a slate while a channel's source is off, so the bundle never breaks
- Channels added and removed while the bundle is on air
What Unda takes and sends
Take in
- MPEG-TS over UDP or RTP, unicast or multicast
- SRT and RIST, with packet recovery over the internet
- Multi-channel feeds: choose the channels you want
- MPEG-2 video and MP2 or AC-3 sound converted for the web
- Packet loss shown per input
Send single channels
- 576p, 720p50 or 1080i25
- H.264, HEVC or MPEG-2 video
- MP2, AC-3 or AAC sound
- Constant bitrate, with the right DVB service type
- Over UDP, RTP, SRT or RIST
Send reliably
- SMPTE 2022-1 error correction on RTP
- RIST with retransmission of lost packets
- Multicast with the TTL and network interface you choose
- Even pacing, so receivers don't drop bursts
TR 101 290 on every stream, in and out
Unda analyses every packet of its bundles, TV outputs and MPEG-TS destinations, and of the UDP, RTP and SRT feeds it receives, against the TR 101 290 checks used by broadcast engineers: sync, continuity, tables and timing, and the DVB service information. Errors in the last minute show on the dashboard and raise an alert, and each stream has a full report that starts with the likely cause and what to do about it.
The stream analyser checks any other stream for a minute or a whole day without receiving it as a channel: a satellite receiver's IP output, a partner's feed, your own output as a receiver sees it. It also measures the rate and the network's jitter and loss (MDI).
We also analysed Unda's bundles with TSDuck, an independent transport stream analyser, over a 12-minute run: no errors, and every timing reference within a tick of where it should be.
| Tested so far | |
|---|---|
| Transport stream analysis | Unda's own TR 101 290 monitor and TSDuck: no errors |
| Receiving software | VLC, ffmpeg, vMix (UDP, in use by a customer) |
| RIST | VLC (librist), both directions, through 5% packet loss |
| Your receivers | Talk to us about yours: we can test with it before you go live |
Related features
Tell us about your headend
Which sources, which receivers, how many channels: we'll tell you honestly what fits and what we still need to test with you.