§ 01 · The deadline doesn't move.

Your video is done. Compliance isn't. We finish it.

Most finished video needs a compliance package. Captions. Audio description. Voiceover. The hours before delivery are when those files become a problem.

Producers · Ad-ops · Editors
Anywhere a video ships with a deadline.

Now
Compliance package needed on most public-facing video · FCC broadcast spec · WCAG 2.1 · ADA Title II
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§ 02

The old way
takes five days
and five hands.

Day 01
Brief
Send file to vendor.
Wait.
Day 02
Caption
Human transcriber
writes caption file.
Day 03
Script
AD writer drafts
description script.
Day 04
Record
VO actor records
voiceover audio.
Day 05
Bundle
Vendor packages
and finally returns.
$255/video
Average vendor invoice
Per finished video. Higher for short-form because per-minute pricing punishes brevity.
5days
Standard turnaround
Quoted as 3–5 by major vendors. Realistic for short-form is 5. Rush fees do not move it under 2.
5hands
Per-deliverable handoffs
Five separate humans, five places it can stall. Compliance files miss deadlines for entirely human reasons.
MINUTES · NOT DAYS

MINUTES.
NOT DAYS.

One upload. Six steps. Zero handoffs.
§ 03

Watch a job
finish — live.

job_0042 · super_bowl_spot_30s.mov 00:00:00
Sourcesuper_bowl_spot_30s.mov · 4.2 MB Outputpostslate_job_0042.zip
01Uploadqueued
02VTTqueued
03Visualqueued
04AD scriptqueued
05Voiceoverqueued
06Packagequeued
00% 120s
Step 01 / 06

Drag.
Drop.
Done.

Upload your finished video. MP4, MOV, or MXF up to 2GB. The job queues the moment the upload completes — no buttons, no confirmations, no waiting room.

Secure · resumable upload
Step 02 / 06

Every word.
Frame-accurate.

Speech is transcribed with word-level timestamps and formatted into a broadcast-spec VTT — 32 char/line, ~17 char/sec, proper cue structure. Drops directly into your delivery workflow.

Speech → broadcast-spec captions · EN · ES · FR
Step 03 / 06

Reads
the picture.

Frame-by-frame visual analysis — scene changes, action, on-screen text. Silence windows where AD narration fits without overlapping speech are precisely mapped.

Visual analysis for AD timing
Step 04 / 06

Writes
the script.

Raw visual descriptions are rewritten to broadcast AD conventions — present tense, objective, concise — and timed to each available silence window. Production-ready, not a draft.

AD script · written + timed
Step 05 / 06

Records
the voice.

The AD script is rendered to a broadcast-grade MP3 by a neutral AI voice, each cue timed to its position. Hand directly to your delivery engineer or editor.

Voiceover rendered + leveled
Step 06 / 06

Hands you
the package.

Eight files land in your delivery screen — captions in four broadcast formats, the AD script in two formats, the AD voiceover, and the bundled ZIP. Download individually or grab everything in one click.

Packaged · signed · delivered
✓All six steps · complete

Job complete.

Eight files · Ready to ship · Delivered to your screen

See what's inside
§ 04

What's
inside the ZIP.

postslate_job_0042_2026-04-25.zip 8 files · one ZIP
Captions · four broadcast formats
.VTT
WEBVTT
VTT
captions.vtt
Web standard. 32 char/line, 17 char/sec, proper cue structure.
00:00:01.200 → 00:00:03.840
Two cars pass on a wet street.
.SRT
SUBRIP
SRT
captions.srt
Universal sidecar. CRLF line endings, comma-decimal timestamps.
00:00:01,200 --> 00:00:03,840
Two cars pass on a wet street.
.TTML
IMSC 1.1
TTML
captions.ttml
Streaming standard. Netflix, Disney+, ATSC 3.0.
<p begin="00:00:01.200">
Two cars pass on a wet street.
.SCC
CEA-608
SCC
captions.scc
US broadcast TV. Scenarist Closed Captions / CEA-608.
Scenarist_SCC V1.0
00:00:01;06 94ae 9420 ...
Audio description · script and voiceover
.TXT
SCRIPT · PLAIN TEXT
AD script
ad-script.txt
Timestamped audio description. Present tense, broadcast convention.
[00:01.20] Two cars pass on a wet street.
[00:03.84] The driver grips the wheel.
.PDF
SCRIPT · PRINT-READY
AD script PDF
ad-script.pdf
Same script, formatted for talent or QC review.
.MP3
AUDIO · NEUTRAL VO
AD voiceover
ad-voiceover.mp3
Broadcast-grade narration. Cue-timed. Loudness-leveled.
Bundle
.ZIP
PACKAGE · ALL EIGHT FILES
Package ZIP
postslate_[job]_[date].zip
Every deliverable above, bundled. Named consistently. 30-day retention.
VTTSRTTTMLSCCTXTPDFMP3
Captions · 4 formats AD · script + voiceover Languages · EN · ES · FR Retention · 30 days
§ 05 · Refine · You own the output

Override the AI
when you need to.

The output is yours. Drag, trim, and snap audio-description cues on a timeline. Edit caption text and timing, with broadcast-spec warnings (32 ch/line, ≤17 cps, ≥1s) called out in real time.

Hit Save. We re-render the voiceover, the AD PDF, and all four caption formats — and refresh the ZIP. No re-upload.

  • Drag · trim · snap on timeline
  • Edit caption text inline
  • Spec warnings · never blocks
  • Re-render · captions, VO, ZIP
§ 06

No one else
is built for deadlines.

Provider Per video Turnaround No subscription Short-form focus Self-serve
Post Slate From $9.80 Minutes ✓ ✓ ✓
Vendor A · Human AD $255+ 3–5 business days ✗ ✗ Partial
Vendor B · Enterprise Quote only SLA-bound ✗ ✗ ✗
Self-serve AI competitor ~$3.40 + $99/mo Minutes ✗ ✗ ✓
Bespoke remediation house $4,000 minimum Days–weeks ✗ ✗ ✗
Two routes

Pick the route
that matches
what you ship.

For Agencies & Production

Broadcast-spec.
Bill at market.

VTT · SRT · TTML · SCC plus AD script and voiceover for every spot — built for Extreme Reach, FreeWheel, Netflix, Disney+, and direct broadcast.

See how it works for agencies For Corporate Video Teams

WCAG-grade.
Wistia & Vimeo ready.

VTT (42-char) · SRT plus AD script and a mixed AD MP3 ready for Wistia, Vimeo, Brightcove, and YouTube. Drop in and ship.

See how it works for brands
§ 07 · Pick a pack · 3 free credits on signup

3 free credits.
Then pay
per pack.

Every account starts with 3 free credits — enough to deliver three short ads before you spend a dollar. No subscription. Credits never expire. Buy what you need, use it when you're ready.

Starter
5
credits
$49
$9.80 / credit
  • 5 credits
  • 4 caption formats + AD script + VO
  • Captions + AD in EN · ES · FR
  • Edit + re-render included
  • Credits never expire
Buy 5 — $49
Most picked
Studio
15
credits
$129
$8.60 / credit
  • 15 credits
  • 4 caption formats + AD script + VO
  • Captions + AD in EN · ES · FR
  • Edit + re-render included
  • Credits never expire
Buy 15 — $129
Agency
40
credits
$299
$7.48 / credit
  • 40 credits
  • 4 caption formats + AD script + VO
  • Captions + AD in EN · ES · FR
  • Edit + re-render included
  • Credits never expire
Buy 40 — $299
House
100
credits
$649
$6.49 / credit
  • 100 credits
  • 4 caption formats + AD script + VO
  • Captions + AD in EN · ES · FR
  • Edit + re-render included
  • Credits never expire
Buy 100 — $649
1 credit · video ≤ 2 min  ·  2 credits · ≤ 5 min  ·  3 credits · ≤ 10 min  ·  Credits never expire. Need longer-form?

Industry rates for AI audio description alone start near $16 / minute. Post Slate delivers captions in four broadcast formats, the AD script in two formats, and the AD voiceover — for less.

§ 08 · Common questions

Anything
else?

Q.01What kinds of video does Post Slate work with?
Any short-form business video — ad spots, corporate training, brand films, product demos, recorded events, investor content. Credits scale with video length: 1 credit per video up to 2 minutes, 2 credits up to 5 minutes, 3 credits up to 10 minutes.
Q.02Does the VTT file meet broadcast spec?
Yes. VTT output follows FCC broadcast requirements — 32 characters per caption line, ~17 characters per second reading speed, proper cue structure.
Q.03Which languages do you support?
Captions and audio description in English, Spanish, and French — including the AD voiceover. Pick the output language at upload; the same broadcast-spec rules (32 char/line, ~17 cps) apply across all three.
Q.04What's the audio description quality like?
Broadcast AD conventions — present tense, objective, concise, timed to dialogue gaps. The voiceover is rendered by a professional-grade AI voice tuned for neutral broadcast narration. Production-ready.
Q.05What about videos longer than 10 minutes?
Standard processing tops out at 10 minutes (3 credits). For longer corporate content — training series, town halls, recorded webinars — .
Q.06What happens if processing fails?
Post Slate delivers gracefully. If one step fails you still receive completed outputs. Your credit is not deducted for failed jobs.
Q.07Do credits expire?
Never. Credits have no expiration. Buy a pack for a busy production cycle and use them across projects over time.
Q.08How long are my files stored?
Files are retained for 30 days after processing. You'll see a warning at 25 days.
Q.09Will you ever add subscriptions?
No. Credits-only is a deliberate product decision. There will never be a monthly minimum.

Your next
video is
minutes
from delivery.

No vendor calls.
No turnaround windows.
No subscription.
Upload and be done with it.

Buy credits
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