This is an old revision of the document!

= 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

• Mini Converter UpDownCross HD
• Tronsmart Pavo M9

== Other options currently not in our main setup === IP based

• Epiphan Broadcaster
  • ~3-10sec latency on the stream output
  • high price ~1k€
• IP Based HDMI extender with decoder software
  • https://github.com/cfra/lenkeng
  • https://blog.benjojo.co.uk/post/cheap-hdmi-capture-for-linux

=== MIPI Camera Serial Interface (CSI) HDMI adpater (e.g. for Raspberry Pi)

• picapture-hd1
• Auvidea B101

== USB2 / USB3 based Those devices are usualy accessed via Video4Linux2. USB3 / 3.1 capable devices are mostly UVC devices. A recent (> 5.0) Kernel is recommendet. The linux tool uvcdynctrl - libwebcam command line tool can be used to tweak settings.

• USB 2 UVC capture devices
  • HDMI2USB (we have one of these, also used by debian video team with voctomix)
    • https://hdmi2usb.tv/home/
    • https://github.com/timvideos/HDMI2USB/wiki
  • HD Capture USB (TLDR electronic waste)
• USB 3 UVC capture devices

== Scaller to be used in combination with a capture device

• Android HDMI Grabber / Scaler
• '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== Other A list of potential interesting frame grabber hardware which we have not tested yet (from 2014, probably outdated)

• Framegrabber Alternativen (DE)