Halloween’s a spooky time.
Out of the woodwork comes a whole host of characters. There’s flying, cackling witches; chainsaw-revving sociopaths; gossipy skulls; gangly skeletons; dumb, white ghosts; athletic werewolves; atrocious yet generic monsters; and slow-footed zombies. With these idiots, anything goes.
You know what else scares the living daylights out of someone? Specifically, a video streaming engineer? Take your pick. Lots of situations can scare a video dev witless. In fact we asked streaming engineers to share their scares.
Here they are, a few chilling scenarios. Take a glance . . . if you dare.
🧟 1. Decoder dies right before live
You’re a minute before your event goes live. After three hours of stable rehearsal, an encoder suddenly decides to power cycle. That’s just not a good vibe. A practical response to prevent such a nightmare is back up your encoder/decoder, independently, plus paths. Also rehearse failover, not just the primary feed.
What, in terms of a Unified Streaming workflow, can you do to hold your ground, stay unafraid? By implementing Unified Origin dual ingest and dual Origin failover (REaP) you can protect the packaging and origin layer adequately. Now, of course, this does not fix a field decoder. But, you know.
🧟 2. Encoder says SUCCESS, but the stream is broken
How many times have you been assured of victory, only to stare failure in the face a millisecond later?
Your HLS jobs are done, free of errors. But, voila, they’ve raised the dead: missing segments, mismatched durations, and damn it all, dismembered (partially published) playlists.
What to do? Sometimes encoders just pump out crappy files (pardon our French). C’est la vie. So focus on the steps you can take. Encode into staging, validate renditions, fragment availability, and timing. Publish atomically. And cap retries.
If you’re running Unified Streaming’s portfolio of products, then take advantage of Unified Packager and Unified Origin for purpose-built packaging. You can validate source content and publishing workflow separately.
🧟 3. A video works on desktop but Android freezes
Suddenly you find that seeking in DASH on Android freezes the video while audio keeps going. Like the undead: their lights are out, but they keep yappin’. Desktop browsers work. So what’s the killer?
Device matrix and seek/restart testing is the issue. You can check aligned keyframes and renditions. Unified Origin generates device-specific outputs. So just source the GOP issues and test your players.
🧟 4. The commercial break nobody warned the packager about
Live sports: it’s unpredictable. Nobody knows when an ad break is going to pop up. Talk about stress.
With the freewheeling, nobody-could-predict-this nature of live sports broadcasting, you’ve got to do manual ad breaks. So you’ve got to deliver SCTE-35 cues early enough for downstream splicers. Otherwise you’ll get clobbered by the dreaded 404.
How to protect yourself? Define cue ownership, insert timely SCTE-35 markers, align IDR frames, and test emergency ad break scenarios.
Ad break tech is a strong suit of Unified Origin, because it masters timed metadata and splice signaling. It does require correctly timed upstream cues, just FYI.
🧟 5. High HD error rate causes an attack of the 404s
Here’s a ghastly tale. The live ABR encoder initially appears to work correctly, but unusually high HD errors and 404 responses indicate a problem. The load balancer marks origin servers as unhealthy, and orchestration removes them from service, leaving only one.
Excluding the LQ-HD track from the manifest reduces errors but doesn't resolve the root cause. After two days of investigation, you discover that the LQ-HD track's segmentation interval was twice as long as required, causing half of its DASH segment requests to return 404 instead of 200.
How could Unified Streaming solutions have intervened or prevented the 404s here?
Well, the most valuable preventative measure to have taken would be an automated preflight check that verified the segment duration and availability of every ABR rendition before the stream went live. After the precheck, you could follow up by monitoring grouped errors by rendition, rather than treating every 404 as an origin failure.
Unified Streaming could provide the packaging, manifest-generation, and HTTP response-handling capabilities that support this workflow. The actual prevention of the doubled LQ-HD interval depends on validating the encoder profile and enforcing the expected timing in the deployment pipeline, though.
Unified Origin Live dynamically generates and updates DASH and HLS manifests based on the incoming media. This can simplify live packaging and manifest management, while making it possible to validate the relationship between the published timeline and actual segment availability. Combined with automated rendition-timing checks and monitoring, this could help detect the misconfigured LQ-HD track much earlier.
🧟 Final scene
With Halloween almost at our doorstep, it’s time to batten down the hatches. Feel free to share your own true horror stories. And together we can turn streaming tricks into treats.