Match
Configured URL prefixes map the incoming CDN path to an owned origin.
Headless audio delivery for voice assistants
InstaCDN
Converts origin audio with FFmpeg, stores the result on S3, and serves assistant-ready files through CloudFront without asking clients to wait.
Input
Origin URL
Transform
FFmpeg profile
Cache
S3 plus CloudFront
Output
Alexa, Google, Bixby
Signal path
Origin audio becomes voice-assistant audio in one request.
InstaCDN keeps the public surface small and lets configuration decide the conversion profile, target format, preload behavior, and timeout response.
Convert
FFmpeg renders the requested quality profile, including silence trimming when enabled.
Store
The cache key combines origin, file path, and quality so profile changes stay isolated.
Ship
CloudFront serves the final audio with cache headers that fit each configured source.
Cache behavior
Fast paths stay fast. Slow paths are contained.
Existing S3 objects return immediately. Misses generate once, lock concurrent Alexa work, and can answer with the preload notification while conversion continues.
Cache hit
Serve binary response
Cache miss
Download, convert, upload
Alexa timeout
Send ups, finish later
Preload
Queue all marked profiles
Public contract
One productive endpoint, no dashboard required.
The service remains machine-driven: clients call the CDN path, operators watch the queue dashboard, and quality profiles live in Laravel config.
GET
/cdn/{origin-url}?quality=alexa&preload=true
Operations
Built for the parts that usually fail quietly.
- Queue monitoring with retry control
- Scheduled generation-lock reset
- Temporary FFmpeg file cleanup
- CloudFront invalidation hooks