mirror of
https://github.com/profullstack/agentbbs.git
synced 2026-08-13 22:37:28 +00:00
Anthony Ettinger
9b0f465946
ssh video-<code>@ joins a PairUX/LiveKit call rendered as truecolor ASCII (▀ half-blocks, 2 pixels per cell); video@ prompts for a code. Codes are minted by PairUX only. Pipeline: VP8 RTP → PLI keyframe requests → ivfwriter remux → ffmpeg decode/scale → RGB24 → ANSI → bubbletea over the SSH PTY. Subscriber-only, no audio in v1. ssh agent@ opens a persisted chat with the operator's agent — AGENTBBS_AGENT_CMD runs per message (stdin→stdout), e.g. `claude -p`. ssh <member>@ with someone else's name prints a classic finger card (.plan, member since, last seen) and disconnects; your own name still enters the hub. cmd/lkpublish: dev publisher for testing (explicit -fps pacing; lksdk IVF replay mispaces from file timebase alone, measured 1fps from a 15fps file; dimensions required or dynacast pauses the track). Verified end-to-end against livekit-server --dev: 128k truecolor cells / 20k distinct colors streamed over a real SSH session; chat round-trip and finger card verified over SSH. Go toolchain pinned to 1.26 via mise.toml (lksdk requirement). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
64 lines
2.3 KiB
Markdown
64 lines
2.3 KiB
Markdown
# Video Calls Addendum (PairUX over SSH)
|
||
|
||
Join a PairUX video call from a terminal: the platform subscribes to the
|
||
call's LiveKit room and renders participant video as **truecolor ASCII** —
|
||
each character cell is two pixels via the upper-half block (▀), the same
|
||
technique doom-ascii uses.
|
||
|
||
## SSH routes
|
||
|
||
| Command | What happens |
|
||
|---|---|
|
||
| `ssh video-<code>@profullstack.com` | join call `<code>` directly |
|
||
| `ssh video@profullstack.com` | prompted for a code |
|
||
|
||
**Codes are minted by PairUX.** The SSH surface never creates calls — to
|
||
start one you must already have a code (create the call in PairUX first).
|
||
|
||
## Pipeline
|
||
|
||
```
|
||
PairUX / LiveKit room
|
||
└─ VP8 RTP track ── PLI keyframe requests ──┐
|
||
└─ ivfwriter remux → ffmpeg (decode + scale) → RGB24 frames
|
||
└─ half-block ANSI (internal/ascii) → bubbletea → SSH PTY
|
||
```
|
||
|
||
- Subscriber-only: the terminal viewer publishes nothing.
|
||
- A PLI is sent on subscribe and every 2s — without it the SFU never starts
|
||
forwarding video to a fresh subscriber, and the periodic refresh bounds
|
||
packet-loss artifacts.
|
||
- Audio is not rendered (it's a terminal); v2 could downlink Opus → local
|
||
audio out for desktop SSH clients.
|
||
- Frame size locks to the terminal geometry at join (`scale=` in ffmpeg);
|
||
~10–15 fps at typical terminal sizes costs a few hundred KB/s of SSH
|
||
bandwidth.
|
||
|
||
## Configuration
|
||
|
||
Shares PairUX's env shape:
|
||
|
||
| Var | Meaning |
|
||
|---|---|
|
||
| `AGENTBBS_LIVEKIT_URL` (or `LIVEKIT_URL` / `NEXT_PUBLIC_LIVEKIT_URL`) | LiveKit ws URL |
|
||
| `AGENTBBS_LIVEKIT_KEY` (or `LIVEKIT_API_KEY`) | API key |
|
||
| `AGENTBBS_LIVEKIT_SECRET` (or `LIVEKIT_API_SECRET`) | API secret |
|
||
| `AGENTBBS_VIDEO_DEBUG` | dump the received IVF stream to this path |
|
||
|
||
Unconfigured hosts refuse with a clear message.
|
||
|
||
## Dev testing
|
||
|
||
```bash
|
||
docker run -d -p 7880:7880 -p 7881:7881 -p 7882:7882/udp \
|
||
livekit/livekit-server --dev --bind 0.0.0.0 # devkey/secret
|
||
ffmpeg -f lavfi -i testsrc=size=320x240:rate=15 -t 900 \
|
||
-c:v libvpx -b:v 400k -g 15 -y test.ivf
|
||
go run ./cmd/lkpublish -room demo1 -fps 15 -file test.ivf
|
||
ssh -p 2222 video-demo1@localhost
|
||
```
|
||
|
||
Note: `lkpublish` passes an explicit frame duration — lksdk's IVF replay
|
||
pacing can't be trusted from the file timebase alone (we measured 1fps from
|
||
a 15fps file without it). Real PairUX publishers are browsers, which pace
|
||
correctly on their own.
|