easy-rtsp 0.1.1

Ingest, transform, and re-host video over RTSP with a simple Python API.

easy-rtsp

Python library for ingesting video, transforming frames with NumPy/OpenCV, and republishing over RTSP, RTSPS, or SRT using FFmpeg, with optional MediaMTX for a proper RTSP server and WebRTC browser playback.

Status: early development. See plan.md for scope and roadmap.

Install

pip install easy-rtsp

For webcam capture, add the OpenCV extra (large wheel; skipped by default so installs stay quick):

pip install "easy-rtsp[webcam]"

Development from a clone: uv sync --extra dev (includes OpenCV for tests).

Releases

Releases use Git tags plus GitHub Actions:

• Run the Cut Release workflow with a version like 0.2.0, or push a tag manually with git tag -a v0.2.0 -m "Release v0.2.0" && git push origin v0.2.0.
• The Release workflow tests the repo, builds sdist and wheel, and publishes to PyPI.
• Publishing uses PyPI Trusted Publishing, so configure a trusted publisher for this repository/workflow/environment in PyPI before the first release.
• If this repository does not have a historical release tag yet, create a baseline tag such as v0.1.0 before relying on tag-derived versions for future releases.

Dependencies

Component	Role
FFmpeg / ffprobe	Required on PATH for decode/encode/publish.
MediaMTX	Optional. Without it, loopback publish uses MPEG-TS over TCP (tcp://127.0.0.1:PORT in VLC), not rtsp://.
OpenCV	Optional extra webcam: opencv-python-headless for Stream.from_webcam only.

Download help (FFmpeg hints + optional MediaMTX binary for your OS):

easy-rtsp install-backends

Set EASY_RTSP_MEDIAMTX to the mediamtx executable or add it to PATH after install.

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Features

Ingest sources

• Stream.open(url) — RTSP or RTSPS URL (FFmpeg decode; reconnect with backoff).
• Stream.from_webcam(index) — Camera via OpenCV.
• Stream.from_file(path) — File decode; looping uses FFmpeg -stream_loop (continuous by default).
• Stream.from_frames(factory, fps, size) — Synthetic or custom frame iterators (BGR uint8).

Frame processing

• stream.map(fn) — Per-frame transform; return None to drop a frame. Chaining supported.

Publishing (serve)

• Shorthand path — e.g. "live" → rtsp://127.0.0.1:8554/live (host/port from StreamConfig.server_host / server_port).
• Full URLs — rtsp://, rtsps:// (credentials preserved), srt:// (MPEG-TS over SRT; no local MediaMTX RTSP process).
• Local MediaMTX — If mediamtx is on PATH and the RTSP port on loopback is free, easy-rtsp writes a minimal config and starts MediaMTX.
• No MediaMTX — FFmpeg listens for one MPEG-TS client over TCP (VLC: open tcp://…).
• Existing server — If something already listens on the port, FFmpeg pushes RTSP in client mode.

Side outputs (RTSP push only)

• record_path — Duplicate stream to MP4 (FFmpeg tee).
• hls_output_dir — HLS (index.m3u8 + segments); optional hls_segment_time.

Encoder / quality

• H.264 via codec / default libx264; override with video_encoder (e.g. h264_nvenc, h264_qsv, h264_amf).
• preset — default, low_latency, quality.
• bitrate — e.g. "4M".
• input_realtime_pace — FFmpeg -re pacing for raw sources (default on for smoother pacing; off for lower latency).

RTSP ingest (relay)

• transport — tcp or udp.
• reconnect, retry_interval_sec, max_reconnect_attempts — Reconnect policy.
• on_reconnecting — Optional callback (attempt_number).
• latency_ms — Optional ingest hint.

WebRTC (optional, MediaMTX + loopback)

• webrtc_enabled — Off by default. Enables MediaMTX’s HTTP/WebRTC listener (video only, no audio).
• webrtc_http_port — Signaling port (default 8889); browser URL is Stream.webrtc_play_url or CLI WebRTC: http://….
• For phones on the same LAN, use the machine’s LAN IP instead of 127.0.0.1. If the page stays on “loading”, try disabling VPN, another browser, firewall UDP/TCP 8189, and MediaMTX 1.11.2+.

File-specific

• file_loop — Loop file continuously (default true); false for a single playthrough.
• fps — Override publish FPS (default from ffprobe, else 30).

Control flow

• serve() — Starts publish in a background thread (non-blocking).
• wait() / wait(timeout=…) — Block until publish ends (polling-friendly for Ctrl+C on Windows).
• stop() — Stops encode/decode FFmpeg children and MediaMTX if started.
• Context manager — with stream: calls stop() on exit.
• Stream.state, reconnect_count (RTSP), viewer_url, webrtc_play_url.

CLI

• relay — Ingest RTSP/RTSPS, republish.
• webcam — Webcam index (default 0).
• file — File path; --loop / --no-loop, --fps, --no-realtime.
• doctor — FFmpeg, ffprobe, MediaMTX, platform.
• install-backends — FFmpeg hints; optional MediaMTX download (--prefix, --dry-run, --skip-mediamtx).

Shared --serve flags: endpoint, transport (relay), reconnect options, --server-host / --server-port, --low-latency-input, --record, --hls-dir, --hls-segment-time, --video-encoder, --webrtc / --no-webrtc, --webrtc-port, -v.

Logs go to stderr; Play: / WebRTC: URLs to stdout. SIGINT is wired so Ctrl+C calls stop() reliably on Windows.

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Quick usage (Python API)

from easy_rtsp import Stream

# Ingest RTSP
for frame in Stream.open("rtsp://camera/live").frames():
    ...

# Webcam → transform → publish
Stream.from_webcam(0).map(process_frame).serve("live")

# File with options (see StreamConfig)
Stream.from_file("clip.mp4", file_loop=True).serve("live")

# Wait for shutdown
stream = Stream.from_webcam(0).serve("live")
print(stream.viewer_url)
stream.wait()

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CLI examples

easy-rtsp relay rtsp://camera/live --serve live
easy-rtsp webcam 0 --serve live --webrtc
easy-rtsp file input.mp4 --serve demo
easy-rtsp file clip.mp4 --serve live --fps 24 --no-loop
easy-rtsp relay rtsp://cam/live --serve live --record out.mp4 --hls-dir ./hls
easy-rtsp doctor
easy-rtsp install-backends

Without MediaMTX, use tcp://127.0.0.1:PORT in VLC (MPEG-TS), not rtsp://…, unless you install MediaMTX.

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License

MIT

Third-party software

easy-rtsp only ships Python code under the license above. At runtime it invokes tools you install yourself; those are separate projects:

Component	Where to get it	License (summary)
FFmpeg / ffprobe	ffmpeg.org, FFmpeg legal	Not MIT — typically LGPL 2.1+ or GPL depending on build and enabled codecs; see upstream and your binary’s LICENSE / docs.
MediaMTX (optional)	bluenviron/mediamtx	MIT
OpenCV (Python bindings)	Optional easy-rtsp[webcam] → opencv-python-headless; opencv.org	Apache 2.0 (see the wheel / PyPI page for the exact package license).

easy-rtsp install-backends may download a MediaMTX release from GitHub; it does not bundle FFmpeg — use official FFmpeg builds or your OS package manager and keep their license terms alongside any binaries you redistribute.