Difference between revisions of "Docs/FAQs/Capture and Playback"

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====Q: Does your solution support multiple HDMI capture cards? What is the upper limit on the number of simultaneous inputs?====
 
====Q: Does your solution support multiple HDMI capture cards? What is the upper limit on the number of simultaneous inputs?====
 
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Userful supports the [[Docs/Blackmagic DeckLink Cards |Blackmagic DeckLink]] and [[Docs/YUAN_Cards |YUAN]] line of HDMI capture cards. The Userful system can handle multiple input cards, limited only by the number of PCIe slots you can fit into your Userful host. You should contact us with details of your project if you intend on using multiple cards ahead of time.
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Userful supports [[Docs/Blackmagic DeckLink Cards |Blackmagic DeckLink]] capture cards. The Userful system can handle multiple input cards, limited only by the number of PCIe slots you can fit into your Userful host. You should contact us with details of your project if you intend on using multiple cards ahead of time.
  
Check our list of supported [[Docs/Blackmagic DeckLink Cards | Blackmagic]] capture cards and [[Docs/YUAN_Cards |YUAN]] capture cards.
+
Check our list of [[Docs/Supported_Capture_Cards |supported capture cards]].
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 +
====Q: How can I use Userful solution to broadcast LiveTV on multiple screens or Video wall?====
 +
You can broadcast LiveTV channels by plugging [[Docs/Supported_Capture_Cards|Supported Capture Cards]] to Userful host. If you need to broadcast more than one channel, you need to purchase a capture card with multiple ports.
 +
 
 +
====Q: When it is preferred to use Hardware Capture source over Desktop Streamer (VNC) source?====
 +
Hardware capture method is preferred over other sources in the following use cases where:
 +
# Latency is not acceptable (the software encoding and network transport of VNC adds 1-3 seconds of latency).
 +
# Network streaming of the external source within the LAN is seen as a security risk.
 +
# Users can not install VNC server software on the source device (e.g., a locked-down desktop image or media player, or devices that are regularly changing or not controllable).
 +
# Users don't want to install and configure the VNC server software on the device.
 +
 
 +
: Please visit [[Docs/Capture Sources | Capture Sources]] for more details.
  
 
====Q: Can I mirror my laptop to a video wall in a conference room?====
 
====Q: Can I mirror my laptop to a video wall in a conference room?====
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====Q: How can I connect an external media player (PlayStation, Xbox, Apple TV, Chromecast, Laptop) to the video wall?====
 
====Q: How can I connect an external media player (PlayStation, Xbox, Apple TV, Chromecast, Laptop) to the video wall?====
Install a [[Docs/Supported_Capture_Cards | supported capture card]], configure the source and connect any non-HDCP source directly to the capture card.
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Install a [[Docs/Supported_Capture_Cards | supported capture card]], configure the source and connect any non-HDCP source directly to the capture card. For more details, visit [[Docs/HowTo/Perform_Multiple_captures_to_a_Single_Video_Wall |How to Capture Multiple External Devices]].
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 +
<!--* Non-Broadcast Resolutions not supported
 +
: If the source you're trying to capture is a laptop or PC and your display is not a broadcast resolution, duplicating its screen to the capture card would not work with Linux or MacOS. Resolutions such as 1366x768, 1440x900 or 1600x900 are only supported in Windows (Windows supports cloning of displays with different resolutions). To fix this:
 +
:* in Windows (set your desktop to Duplicate , then change the capture card resolution in Display Settings)
 +
:* in Linux (verify that mirror display option is unchecked in the Display Settings)
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:* in Mac (verify that mirror display option is unchecked in the Display Settings)
  
 +
:This will enable your laptop to correctly detect the display resolution from the capture card.<br>
 +
 +
:Note: Laptops with resolutions such as 720p, 1080p, and 4k will all work plug and play.
 +
 +
* Remove '''any and all Splitters/Switches''' from the set up. Connect the source directly to the capture card.
 +
 +
* HDCP content not supported
 +
:: Verify that your capture source doesn't have an encrypted HDMI feed (HDCP). Note: If its a PC or Laptop or Game Console, verify that you're not playing any HDCP content (e.g. DVD or Blu-ray) or first run the HDMI signal through an HDCP compliant splitter before connecting it to the capture card to eliminate this potential cause.
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-->
 
====Q: How can I update firmware for the Blackmagic Capture Card?====
 
====Q: How can I update firmware for the Blackmagic Capture Card?====
 
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====Q: Is there any lag time between capture and playback?====
 
====Q: Is there any lag time between capture and playback?====
There could be a negligible lag depending on source media type. However, it can be minimized by lowering the refresh rate of the individual displays.
+
There could be a negligible lag time (i.e., 30-100 ms) depending on source media type, size of the video wall, capture cables etc. However, it can be minimized by lowering the refresh rate of the individual displays.
  
 
====Q: Do you support external Apple / Windows / Android / Playstation players?====
 
====Q: Do you support external Apple / Windows / Android / Playstation players?====
A broad range of external devices can be connected to the Userful host via a [[Docs/Supported_Capture Cards |capture card]]. Plug the device directly into the capture card to play the content.<br>
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A broad range of external devices can be connected to the Userful host via a [[Docs/Supported_Capture Cards |capture card]]. Plug the device directly into the capture card to play the content. Please note that HDCP encrypted content playback is not supported.
Please Note: HDCP encrypted content playback is not supported.
 
  
 
====Q Can I connect an existing matrix switch to the video wall?====
 
====Q Can I connect an existing matrix switch to the video wall?====
'''Yes''', simply plug one of your “output” HDMI cables into the HDMI capture card in the Userful host. The video wall would then become one of your switched outputs. For new installations, it is worth considering building a Userful Host with multiple capture cards and using the Userful host to replace your matrix switch altogether.<noinclude>
+
'''Yes''', simply plug one of your “output” HDMI cables into the HDMI capture card in the Userful host. The video wall would then become one of your switched outputs. For new installations, it is worth considering building a Userful host with multiple capture cards and using the Userful host to replace your matrix switch altogether.
 +
 
 +
====Q: Why do my displays freeze when I map more than one display/video wall to a single source?====
 +
Due to limitation of the capture cards, only one process can access a single input at a time. To playback a single source on multiple displays/video walls you must use [[Docs/Mapping#Mirror_Group_Configuration | Mirror Groups]].
 +
 
 +
====Q:  Do you support “HDMI Extender over CAT5e/CAT6” to capture external device(s)? ====
 +
'''Yes.''' If the distance between the captured external device and the Userful host is long, you can use HDMI Extender to avoid long distance HDMI cables and HDMI Extender Repeater. We have tested a couple of HDMI Extenders over CAT5e/CAT6 (e.g., D-HDMI-EP30 and D-HDMI-EPNP) it works fine with our solution for a distance of upto 30 meters.
 +
The HDMI Extender come in a pair (i.e., transmitter and receiver), the transmitter unit will be connected to the external device and the receiver unit will be connected to capture card installed in the Userful host. A pair of CAT5e/CAT6 cable is used to connect the two units.
 +
 
 +
<noinclude>
 
==Related Links==
 
==Related Links==
 
* [[Docs/FAQs |Frequently Asked Questions]]  
 
* [[Docs/FAQs |Frequently Asked Questions]]  
 
* [[Docs/Supported Capture Cards | Supported Capture Cards]]
 
* [[Docs/Supported Capture Cards | Supported Capture Cards]]
* [[Docs/Station Mapping/Blackmagic DeckLink Capture | Blackmagic DeckLink Capture]]
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* [[Docs/Mapping/Blackmagic DeckLink Capture | Blackmagic DeckLink Capture]]
* [[Docs/Station Mapping/Video Capture | Video Capture]]
+
* [[Docs/Mapping/Video Capture | Video Capture]]
 
+
* [[Docs/Capture_Sources | Capture Sources]]
 
</noinclude>
 
</noinclude>

Latest revision as of 21:39, 7 March 2018


To return to the main documentation page, Click Here.



Capture and Playback

Q: Does your solution support multiple HDMI capture cards? What is the upper limit on the number of simultaneous inputs?

Userful supports Blackmagic DeckLink capture cards. The Userful system can handle multiple input cards, limited only by the number of PCIe slots you can fit into your Userful host. You should contact us with details of your project if you intend on using multiple cards ahead of time.

Check our list of supported capture cards.

Q: How can I use Userful solution to broadcast LiveTV on multiple screens or Video wall?

You can broadcast LiveTV channels by plugging Supported Capture Cards to Userful host. If you need to broadcast more than one channel, you need to purchase a capture card with multiple ports.

Q: When it is preferred to use Hardware Capture source over Desktop Streamer (VNC) source?

Hardware capture method is preferred over other sources in the following use cases where:

  1. Latency is not acceptable (the software encoding and network transport of VNC adds 1-3 seconds of latency).
  2. Network streaming of the external source within the LAN is seen as a security risk.
  3. Users can not install VNC server software on the source device (e.g., a locked-down desktop image or media player, or devices that are regularly changing or not controllable).
  4. Users don't want to install and configure the VNC server software on the device.
Please visit Capture Sources for more details.

Q: Can I mirror my laptop to a video wall in a conference room?

Yes. However, if you are switching between different laptops throughout the day, this is not a recommended use case as HDMI capture settings may need to be changed with each laptop due to variances in output resolution and color space.

Q: My media player does not have an HDMI output, how can I run it to a video wall?

While the vast majority of modern media players support HDMI output, contact us with your needs and we may be able to advise on the best approach. It is also possible with some Content Management Systems to integrate their player software directly into Userful.

Q: How can I connect an external media player (PlayStation, Xbox, Apple TV, Chromecast, Laptop) to the video wall?

Install a supported capture card, configure the source and connect any non-HDCP source directly to the capture card. For more details, visit How to Capture Multiple External Devices.

Q: How can I update firmware for the Blackmagic Capture Card?

To update firmware:

  • Open the terminal and type in the following command to check the firmware version (sudo or root privileges are required through out the procedure):
  $ sudo BlackmagicFirmwareUpdater status 

The output looks something like:

 0: /dev/blackmagic/io0 [Intensity Pro 4K] 0x85 OK 

Status "OK" represents latest firmware. If the command returns “PLEASE UPDATE”, type the following command and reboot the system:

  $ sudo BlackmagicFirmwareUpdater update 0 

where "0" represents the capture card number

Q: Is there any lag time between capture and playback?

There could be a negligible lag time (i.e., 30-100 ms) depending on source media type, size of the video wall, capture cables etc. However, it can be minimized by lowering the refresh rate of the individual displays.

Q: Do you support external Apple / Windows / Android / Playstation players?

A broad range of external devices can be connected to the Userful host via a capture card. Plug the device directly into the capture card to play the content. Please note that HDCP encrypted content playback is not supported.

Q Can I connect an existing matrix switch to the video wall?

Yes, simply plug one of your “output” HDMI cables into the HDMI capture card in the Userful host. The video wall would then become one of your switched outputs. For new installations, it is worth considering building a Userful host with multiple capture cards and using the Userful host to replace your matrix switch altogether.

Q: Why do my displays freeze when I map more than one display/video wall to a single source?

Due to limitation of the capture cards, only one process can access a single input at a time. To playback a single source on multiple displays/video walls you must use Mirror Groups.

Q: Do you support “HDMI Extender over CAT5e/CAT6” to capture external device(s)?

Yes. If the distance between the captured external device and the Userful host is long, you can use HDMI Extender to avoid long distance HDMI cables and HDMI Extender Repeater. We have tested a couple of HDMI Extenders over CAT5e/CAT6 (e.g., D-HDMI-EP30 and D-HDMI-EPNP) it works fine with our solution for a distance of upto 30 meters. The HDMI Extender come in a pair (i.e., transmitter and receiver), the transmitter unit will be connected to the external device and the receiver unit will be connected to capture card installed in the Userful host. A pair of CAT5e/CAT6 cable is used to connect the two units.


Related Links