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Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
The Waveshare HDMI to USB Adapter is a driver-free USB video capture card. It supports up to 4K input (3840×2160@30 Hz) and outputs up to 1080p (1920×1080@30 Hz) over USB. The device works with Windows, Linux, and macOS, and is suitable for OBS and other recording/streaming software.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL21559 WSAL21559 – USB Port High Definition HDMI Video Capture Card, for Gaming / Streaming / Cameras, HDMI to USB]
* [https://shop.jw-tech.eu/p/WSAL24211 WSAL24211 – USB Port High Definition HDMI Video Capture Card, for Gaming / Streaming / Cameras, HDMI to USB]

== Technical overview ==
* HDMI input: compatible with HDMI 1.4b, DVI 1.0, and HDCP 1.4.
* Supported color formats: RGB444, YCbCr 422/444/420; color depths of 24-, 30-, and 36-bit.
* Maximum input resolution: 3840×2160 at 30 Hz (4K).
* USB output: supports YUV and JPEG modes; maximum output resolution 1920×1080 at 30 Hz (1080p).
* Compatible with the UVC 1.0 protocol and USB 1.1 mode.
* On PC, OBS is recommended; add the source as “Video Capture Device” and activate it.
* On Raspberry Pi 4B, the frame rate may drop to about 22–23 fps due to software and hardware limits.
* OBS on Raspberry Pi must be started with LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libGL.so.1 MESA_GL_VERSION_OVERRIDE=3.3 obs.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo apt-get update
sudo apt-get install obs-studio -y
LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libGL.so.1 MESA_GL_VERSION_OVERRIDE=3.3 obs
</syntaxhighlight>

== Notes and version constraints ==
* Specific compatibility limitations for certain HDMI sources are not stated in the source; verify before deployment.
* On Raspberry Pi, the effective frame rate can fall below 30 fps (measured ~22 fps at 1080p), depending on system version and performance.
* If the HDMI signal remains black, check the connection between the adapter and the HDMI device, then re-activate the source.
* Some SSH login environments may be incompatible with OBS on Raspberry Pi or produce very low frame rates; using a desktop terminal or VNC is recommended.
* MJPEG is not supported by OBS on Raspberry Pi at this stage; use YU12 or YV12 instead.
* Driver-free installation reliability across all supported OS versions should be confirmed before purchase.

== Source and revision record ==
* [https://www.waveshare.com/wiki/HDMI_to_USB_Adapter HDMI to USB Adapter - Waveshare Wiki]
* Source revision: 67457
* Captured: 2026-09-03T02:58:41+00:00
* SHA-256: <code>71fc131fa1b12069df1c0c2ad83dbba39cebac6e3db8235abd60ea82a5a666ff</code>

WSAL21559 – HDMI to USB Adapter/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex