Framegrabber / Scaler [c3voc]

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= 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
  * [[hardware:Mini_Converter_UpDownCross_HD]]
  * [[hardware:tronsmart_pavo_m9]]

== Other options currently not in our main setup
=== IP based 
  * [[hardware: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)
    * [[https://lintestsystems.com/products/picapture-hd1 | picapture-hd1]]
    * [[https://auvidea.eu/product/70501/ | Auvidea B101]]

== 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.   

  * [[hardware:usb2-capture-devices | USB2]]
    * HDMI2USB
      * [[https://hdmi2usb.tv/home/]] 
      * [[https://github.com/timvideos/HDMI2USB/wiki]]
  * [[hardware:hdcaptureUSB]] (TLDR electronic waste)
  * [[hardware:usb3-capture-devices | USB3]]


== Scaller to be used in combination with a capture device
  * [[hardware:android-hdmi-in]]
  * '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A list of potential interesting frame grabber hardware which we have not tested yet (from 2014, probably outdated)
    * [[shopping:framegrabber-alternativen]] (DE)