Orbiscreen v0.29.0

Introduce WebTransport Annex-B web streaming with WebCodecs hardware decoding, one-frame VBV CBR rate control for low latency, reliable IDR and parameter set distribution with Reed-Solomon FEC for P-frame datagrams, robust Android client AU reordering and packet loss recovery, and bump the release matrix across all platforms.

Features

• WebTransport Annex-B and WebCodecs web client PR #80 by @sentinelt):
  • Chromium opens WebTransport on signaling_port + 2 (wt_port) with serverCertificateHashes and decodes Annex-B access units with VideoDecoder onto a canvas.
  • P-frames ride QUIC datagrams (unreliable). Hello, ping/pong, and IDR stay on the control stream. The same port serves the UI over HTTPS; HTTP / and /client/ redirect there. Android keeps HTTP on :8788.
  • The self-signed certificate is stored in $XDG_CONFIG_HOME/orbiscreen/wt-cert.pem and wt-key.pem (0o600, parent 0o700) and reused across restarts (14-day WebTransport cap).
• Reed-Solomon FEC on P-frame datagrams PR #80 by @sentinelt):
  • Systematic Cauchy RS over GF(256). Ladder: 1-3 fragments no FEC; 4-16 +2; 17-64 +3; 65+ +4. IDRs stay on the reliable stream.
• Reliable IDR and SPS/PPS PR #80 by @sentinelt):
  • Keyframes (SPS/PPS prepended when missing) go on the WebTransport control stream and on TCP GET /idr for Android. A reliable IDR resets the datagram assembler so the next P-frame starts a new GOP.
• One-frame VBV/CPB rate control PR #80 by @sentinelt):
  • Hardware and software H.264 encoders size the coded-picture buffer to one frame of the CBR target so a single IDR cannot occupy hundreds of milliseconds of wire time.
• Frame transport guide PR #80 by @sentinelt):
  • Added comprehensive docs/FRAME_TRANSPORT.md documenting I/P/IDR/GOP terminology, AU datagram/reliable stream partitioning, and hold-until-IDR packet loss recovery.

Performance & Low Latency

• HTTP MPEG-TS (GET /stream) keeps the encoder's infinite GOP: IDR on join, lag, and muxer failure, not every second.
• IDR requests are debounced to 250 ms on HTTP, UDP, and WebTransport until a keyframe arrives.
• A failed UDP datagram no longer aborts the rest of that access unit; only TooBig stops the fragment loop.
• Early P-frames after a one-sequence hole are reordered instead of immediately requesting an IDR.

Bug Fixes

• Quinn datagram stability: Pinned quinn-proto to 0.11.16 to prevent daemon aborts from dropped datagram double-subtraction.
• Android mid-GOP packet retention: UDP feedCodec drains and retries full input buffers, holding until the next IDR instead of discarding mid-GOP P-frames. HTTP/ExoPlayer no longer drops late P-frames.
• Connect IDR pacing: Connect IDR is sent after the video path is live so the initial keyframe is not lost during DPLPMTUD.

Changed

• Workspace & Packaging:
  • Bumped Cargo workspace package version to 0.29.0.
  • Incremented Android client versionCode to 103; updated versionName to "0.29.0".
  • Updated tauri.conf.json version to 0.29.0.
  • Bumped PKGBUILD pkgver to 0.29.0.
  • Added 0.29.0-1 release entry to debian/changelog and data/orbiscreen-copr.spec.
  • Synchronized documentation badges across all architecture and specification guides.

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