Grabbing Audio and Video on a Board Farm
summary
A board-farm prototype uses a NanoPi-based MuxPi to give per-board control (power, SD mux, HID emulation) and a cheap HDMI extender ($30) that outputs MPEG-over-Ethernet to capture AV; software pieces are Biruta/Fellows for allocation, VLC 3 (use network-caching=200, clock-jitter=0) to receive, and kernel ~4.11 on the NanoPi. It works for screenshots and remote control but shows ~0.5–1s latency, occasional audio/video sync loss, multicast-only output, heat and stability issues.
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chapters (17)
- 0:00Introduction
- 0:34Agenda
- 1:37Use Cases
- 7:43Lava
- 9:18Lab in a Box
- 10:36NanoPI
- 18:00HDMI Grabber
- 21:26HDMI Extender
- 25:26Capture
- 27:22Screenshot
- 29:39Input events
- 30:37Keyboard
- 32:10Mouse
- 34:52Live Demo
- 37:57Issues
- 40:29Open Hardware Project
- 42:23Summary
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