Most encoder quotes get compared on price per channel, and that's the number that misleads. An 8-channel unit looks like the cheapest way to get a channel on air. It stops looking cheap the first time you need to take that unit out of service with every channel still on it.

The failure domain is the real unit

One box carrying N channels means N channels share a reboot, a firmware update, a power feed and a failed fan. If those eight channels belong to one network and one maintenance window, that's fine. If they belong to different clients, or one of them is the channel that cannot drop next to seven that can, a routine update turns into a negotiation. Density is a decision about how much you are willing to lose at once, and price only enters after that.

Unused inputs cost the same as used ones

The case for the bigger unit usually rests on growth: we have three channels now, but we'll be at eight by next year. Sometimes that's a signed contract or a venue already on the calendar. Often it's a hope. Per-channel pricing only works in your favor when the channels are connected. On the Premio line, list price per channel does fall between the 4ch and the 8ch, but an 8ch running three feeds is a 3-channel deployment that was paid for at 8-channel prices. If the growth has a source you can name, buy for it. If it doesn't, buy for what's running and add a second unit when the channels exist.

Where the single-channel unit still earns its place

A 1ch encoder is easy to dismiss next to the larger ones, but it solves problems they don't. A critical channel on its own box shares its fate with nothing else. A remote site with one camera doesn't need seven idle inputs. And a primary-and-backup pair is simple to reason about when each channel has its own hardware, instead of two big units each carrying everything.

Where density pays

For a facility with a stable lineup, one device to power, cable, monitor and manage beats eight. The 4ch and 8ch Premio units list the same outputs and codecs, UDP, RTMP and SRT out, MPEG2, H.264 and H.265 video, AC3, AAC and MPEG2 audio, with multiple audio tracks and closed captioning, so the choice between them has nothing to do with capability. It comes down to how you want to divide your risk and your rack. Decoding at the far end follows the same logic, and the D-Streamer line covers the IP-to-SDI side.

A quick way to size it

Count the channels that have to run around the clock today. Mark the ones whose loss would cost the same thing, and keep them together. Add only the channels that have a real source behind them in the next twelve months. Then group so that no single box carries more than you'd accept losing in one bad afternoon. Six channels with two of them critical, for example, often land as a 4ch for the routine feeds and dedicated units for the two that matter, rather than an 8ch with two inputs idle.

The same density question comes up on the transcoding side, where the answer depends on workload rather than risk. We covered it in GPU-Based Video Processing: When Does It Make Sense?

Talk to an Engineer about sizing Premio for your channel lineup.