A minimal, fully static build of FreeRDP's wfreerdp.exe for headless use: a client that runs
hidden (for example in session 0 of a Windows service) only to keep an RDP session alive, with
sound and microphone redirection. Built for OpenStreamMS.
| Size | |
|---|---|
Upstream-style static wfreerdp.exe 3.32.0 |
9.2 MB |
| SlimFreeRDP 3.33.0 | 5.8 MB |
One file, no DLLs besides the ones that ship with Windows.
- Windows client (
wfreerdp), TLS 1.2/1.3 and NLA (NTLM), certificate handling. - Channels:
rdpsnd(sound),audin(microphone),drdynvc,rdpdr(required byrdpsndand/network:lan, with no drive/printer/serial/parallel/smartcard devices),railandencomsp(referenced unconditionally by the Windows client). - Options in use:
/v /u /d /p /cert:ignore /w /h /bpp /scale-desktop /network:lan /audio-mode:redirect /sound:sys:winmm /microphone:sys:winmm,dev:<id> +disable-output /log-level.
- SDL clients, server, proxy, shadow, WinPR tools, samples, tests.
- FFmpeg, H.264 (OpenH264, Media Foundation), JPEG, scaling, Opus/AAC/MP3/GSM audio codecs.
- Kerberos, Azure AD, PKCS#11, smartcard.
- Channels: clipboard, drives, printers, serial/parallel, USB,
disp,rdpgfx, video, camera, input (rdpei,ainput) and the rest./gfxand/rfxare not available. - OpenSSL reduced to TLS 1.2/1.3 with RSA, EC, X25519, DH, AES, SHA and DES. No legacy provider: RC4 and MD4 for NTLM come from FreeRDP's internal implementations. No QUIC/DTLS, CMS, OCSP, ChaCha20, post-quantum (ML-KEM/ML-DSA/SLH-DSA) or national ciphers.
patches/0001-audin-winmm-choose-microphone.patch: upstream's winmm microphone backend ignores
dev: and always opens the default communications microphone. With the patch,
/microphone:sys:winmm,dev:<value> opens the waveIn device whose Windows endpoint id
({0.0.1.00000000}.{guid}) or name matches <value>; default or no match keeps the old behaviour.
Requirements: Visual Studio 2022/2026 with the C++ workload (CMake and Ninja included),
Strawberry Perl and NASM on PATH.
:: download and verify freerdp-3.33.0.tar.gz and openssl-3.6.5.tar.gz, then extract both
build.cmd C:\src\freerdp-3.33.0 C:\src\openssl-3.6.5 C:\build\slim
:: -> C:\build\slim\out\wfreerdp.exeApache-2.0, same as FreeRDP and OpenSSL. See LICENSE and NOTICE.md.