Framegrabber / Scaler
For the conferences we are covering, most presenters use their own PC.
The resolution and frame rates of these PCs widely differ.
To get a consistent signal into the video mixer, we have to scale or convert the output signal to a uniform type.
Another similar list from the timevideo project can be found on https://github.com/timvideos/HDMI2USB/wiki/Alternatives
Currently in use in our setup
Other options currently not in our main setup
IP based
-
- ~3-10sec latency on the stream output
- high price ~1k€
- IP Based HDMI extender with decoder software
MIPI Camera Serial Interface (CSI) HDMI adpater (e.g. for Raspberry Pi)
USB2 / USB3 based
Those devices are usually accessed via Video4Linux2. USB3 / 3.1 capable devices are mostly UVC devices.
A recent (> 5.0) Kernel is recommended.
The Linux tool uvcdynctrl - libwebcam command line tool can be used to tweak settings.
-
- HDMI2USB
- HD Capture USB (TLDR electronic waste)
Scaller to be used in combination with a capture device
- 'professional' scaler aka 'Folson Image Pro HD 2'
- we only rent these if necessary for more complex setups e.g. used at C3
- some [e.g. Analogway Pulse] can also be used as seemless switcher
- expensive
Other
A list of potential interesting frame grabber hardware which we have not tested yet (from 2014, probably outdated)