Captions VTT + SRT
Two universal caption formats from a single broadcast-spec source: 32 characters per line, ≤17 cps reading speed, frame-accurate timestamps. Submit directly to Extreme Reach, FreeWheel, or your broadcaster.
Broadcast · OTT · Extreme Reach · FreeWheel
Deliver compliance at multiples of what it costs you.
Every spot you produce needs a compliance package before it ships — broadcast-spec captions (VTT, SRT, TTML, SCC), an audio-description script, and an AD voiceover. Post Slate produces all four in minutes. Bill your client what the market pays. Your cost: as low as $6.49 per spot.
The markup opportunity
Your client expects
to pay for this.
Compliance packaging has always been a billable line item. Your clients have budgeted for it. The question is whether you're capturing that margin or passing it to a third-party vendor.
Margin per spot
$190–490
on every spot you produce.
Per ≤2-minute spot · broadcast-spec compliance package · 1 credit
Your client pays
$200–500
per spot · industry rate (CC + AD script + VO)
You pay
$6.49–$9.80
per spot · 1 Post Slate credit
You keep
$190–490
per spot · pure margin
Monthly margin at volumeHouse pack · credits never expire
5 spots / mo
$950–2,450margin / mo
20 spots / mo
$3,800–9,800margin / mo
50 spots / mo
$9,500–24,500margin / mo
Volume buying is not a use-it-or-lose-it bet. Credits never expire — bank them across cycles.
This is not a compliance cost.
It's a margin line.
Why this matters operationally
Broadcasters don't
grant extensions.
Netflix, Disney+, Hulu, Extreme Reach, and FreeWheel publish delivery specs for captions and audio description. A file that doesn't meet spec is rejected. A rejection means a missed trafficking window. A missed window means your client's spot doesn't run.
Post Slate's broadcast mode outputs files built to FCC and broadcaster spec from the start: 32-character caption lines, ≤17 cps reading speed, frame-accurate timestamps, broadcast-neutral AD voiceover. Your delivery team submits directly. No reformatting. No back-and-forth.
9%
of TV ads had captions in 2024.
1%
of TV ads had AD in 2024.
$200–500
avg vendor cost per spot outsourced.
3–7 days
avg turnaround from outsourced vendor.
Sources: Extreme Reach 2024 industry report; vendor pricing surveys.
What you deliver
Everything needed
to deliver.
TTML + SCC sidecars
The two formats broadcast trafficking actually asks for. TTML / IMSC 1.1 Text Profile for Netflix, Disney+, Hulu, and ATSC 3.0 delivery. SCC / CEA-608 for US broadcast networks, cable, and ad aggregators. Built to spec from the same source as your VTT. No external vendor.
AD script (PDF + TXT)
Professional audio-description script written to broadcast AD conventions — present tense, objective narration timed to fit dialogue gaps. PDF and TXT for easy client review or sign-off.
AD voiceover MP3
Broadcast-grade AI narration of the AD script. Neutral voice, professional delivery, each cue timed to its position in the spot. Hand to your delivery engineer or editor. No VO session required.
Your shop
Built for the
shops that ship.
Production companies
You produce 10–50 spots a month for broadcast and streaming clients. Compliance is a line item you've been handling inefficiently — one-off vendor relationships, inconsistent turnaround, money left on the table. Post Slate turns it into a repeatable, profitable workflow.
Ad agencies
Post-production doesn't stop at picture lock. Your traffic team is chasing compliance files on every job. Post Slate closes that gap before it becomes a delivery problem — and adds a billable service to every job.
Post houses
Clients are asking for compliance packages on final delivery. You've been referring them out. Now keep that work in-house, add margin to every project, and deliver everything in one ZIP the same day picture is approved.
Where your files go
Built to spec
for every major
destination.
Extreme Reach
FCC broadcast VTT. Closed captioning and audio description. Submit Post Slate outputs directly.
Netflix
IMSC 1.1 (TTML) captions. AD script + voiceover delivery-ready.
Disney+ / Hulu
Closed captions and audio description per their delivery spec. Submit Post Slate outputs directly.
CTV / Streaming
Platform-specific caption tracks and AD audio tracks.
FreeWheel
Ad server delivery with caption-delivery compliance.
Direct broadcast
Standard AD audio channel (SAP) configuration ready.
Common questions
Anything else?
Q.01Is one credit really one spot?
One credit covers a video up to 2 minutes — which is most :15, :30, :60, and many :90/:120 spots. Longer cuts and explainers use more credits (≤5 min = 2 credits, ≤10 min = 3 credits). The cap is 10 minutes.
Q.02Can I buy credits in bulk for high-volume months?
Yes. The House pack (100 credits, $649) brings per-credit cost to $6.49. Credits never expire, so volume buying isn't a use-it-or-lose-it bet.
Q.03Does the VTT work directly with Extreme Reach?
Yes. Broadcast mode outputs FCC-compliant VTT plus TTML and SCC sidecars covering every major broadcast and OTT destination. Extreme Reach also sells captioning and AD as add-ons — Post Slate is the self-serve alternative at a fraction of the cost and turnaround.
Q.04What about spots with music-only sections or very dense dialogue?
The AD script is generated with awareness of dialogue gaps. For spots with extremely limited pauses — some music-heavy automotive ads, for example — the script flags where description space is limited. Human review and our timeline editor are always available before submission.
Q.05Can I white-label the ZIP for client-facing delivery?
Not currently. The ZIP is Post Slate-branded. For high-volume agency relationships, contact us to discuss custom delivery configurations.
Next spot in.
Compliance package
out in minutes.
No vendor relationship to manage.
No quote to request.
Buy credits. Process spots. Bill your clients.