Nerd sniping myself into a rabbit hole. Streaming online audio to a Sonos speaker
summary
An Android app is built that actually plays YouTube audio on Sonos by discovering speakers with SSDP broadcast discovery, sniffing traffic with tcpdump on UniFi AP, and reverse‑proxying a streamed conversion from mp4 AAC into ADTS on the phone. Tools used: soco/UPnP SOAP control, mp4parser library, Ktor embedded web server, and fallback experiments with FFmpeg (too slow for long streams). The app repackages samples into ADTS frames on the fly and it works — demos show audio plus artwork and title on the Sonos.
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chapters (19)
- 0:00Start
- 4:04Now what...
- 7:10Connect to speakers
- 7:49Get MP4 URL of online videce
- 10:01Send URL to speakers
- 11:45Maybe it's that SoCo libras
- 12:23Sniffing the network
- 15:08SOAP payload
- 17:12Maybe it's the MP4 format
- 22:06deadfood
- 24:31Architecture
- 25:27Technology choices
- 28:06Research...
- 29:27It all starts with a manifest!
- 29:57And checking the intent...
- 31:42SSDP Simple Device Discovery Protocol
- 34:41MP4 to ADTS - FFMpeg?
- 36:21MP4, ADTS, Atoms, Boxes
- 49:20In summary...
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