6 ms·

I wonder how they achieve "Zero lag". I've been using similar software ( AirDisplay [1] ) and the lagging is awful. You have to be certified hardware manufactu

I wonder how they achieve "Zero lag". I've been using similar software ( AirDisplay [1] ) and the lagging is awful. You have to be certified hardware manufacturer if you want to use the USB connection to transmit any data between the iPad and your Mac [2]. So my bet is they either use WiFi ( which can roughly get 60fps on retina resolution ) or Bluetooth 4. In both cases I think the refresh rate would not satisfy in a lot of cases, e.g. playing a YouTube video through their software on the iPad. 1: https://avatron.com/applications/air-display/ https://avatron.com/applications/air-display/ 2: https://avatron.com/support/faq-air-display/#toggle-id-13 https://avatron.com/support/faq-air-display/#toggle-id-13 EDIT: I've found more information on their facebook page [3] > To setup, download and open duet on your Mac (for free) and on iOS. > Connect your device using a lightning or 30 pin cable. Done. > No need to worry about firewall settings, Wi-Fi speed or your 802.11n network. > Duet is secure, simple, and allows you to use your iOS and OS X devices in harmony. So I guess I was wrong with my bets. Maybe they got a hardware manufacturer license from Apple. Anyway launch is on 16th, so let's see. 3: https://www.facebook.com/duetdisplay/info?tab=page_info https://www.facebook.com/duetdisplay/info?tab=page_info

deleted 12y ago
[deleted]
darylteo 12y ago
http://www.businessinsider.com.au/duet-display-app-turns-ipad-into-second-screen-2014-12 http://www.businessinsider.com.au/duet-display-app-turns-ipa... Has a review
- fuzzywalrus 12y ago
  "Most importantly, Duet Display is the first app that actually turns your iPad into a second display I’d actually like to use. As someone who has tried Air Display and uninstalled it shortly afterward, frustrated, I can honestly say this is the only option that’s worth it." Interesting, I tried Air Display and (another app) ages ago and used it off and on. It was "neat" and worked well as my Terminal window but a very poor stand for a monitor. Looks like I'll be dusting off my iPad 2.
supercoder 12y ago
My guess would be they're just using the shared documents area . There's a number of libraries on the desktop that let you access an API to write to the shared documents area. I'd guess they'd just be piping a mp4 feed to this and the iOS would just be reading from there.
- ejstronge 12y ago
  Is there any chance this approach could eventually be used on a Linux distro or Windows?
  - kevin_thibedeau 12y ago
    The technology already exists in X11. The problem is getting devices to act as display servers.
    - ejstronge 12y ago
      I haven't seen examples of folks trying to use iPads (for example) as X11 displays, likely because it's outside my area of expertise. Do you know of any examples?
      - seanp2k2 12y ago
        Sounds like something that could only exist on Cydia. Has anyone checked there?
      - aaronem 12y ago
        iSSH includes an X11 display server, and I've had reasonable success using it with clients on an assortment of architectures, including a Tru64 VM running Open Genera. I wouldn't expect it to work well with something like video playback unless you've got a very fast and uncongested wireless network (or possibly a Lightning-to-Ethernet adapter, if such things exist), but if you don't need that kind of sustained responsiveness, it's at least worth a try.
iancarroll 12y ago
There's a working download link in the footer, not sure why.
- iron_ball 12y ago
  I downloaded the application, and it prompted a restart to install a driver, but did nothing further. duet.app does nothing when I open it, and plugging in my iPad does nothing either. Looks like we have to wait for the App Store release to install the iPad half of the app.
  - drinchev 12y ago
    After installing, there is an icon in my menubar that says I should open duet on my iOS [1]. I believe we wait for the iOS app tomorrow and see what's the price and how this thing works 1: http://i.imgur.com/1fEHPLF.png http://i.imgur.com/1fEHPLF.png
xxyyzz3d 12y ago
https://news.ycombinator.com/item?id=8776877 https://news.ycombinator.com/item?id=8776877

deleted 12y ago

[deleted]

darylteo 12y ago

http://www.businessinsider.com.au/duet-display-app-turns-ipad-into-second-screen-2014-12 http://www.businessinsider.com.au/duet-display-app-turns-ipa... Has a review

fuzzywalrus 12y ago
"Most importantly, Duet Display is the first app that actually turns your iPad into a second display I’d actually like to use. As someone who has tried Air Display and uninstalled it shortly afterward, frustrated, I can honestly say this is the only option that’s worth it." Interesting, I tried Air Display and (another app) ages ago and used it off and on. It was "neat" and worked well as my Terminal window but a very poor stand for a monitor. Looks like I'll be dusting off my iPad 2.

supercoder 12y ago

My guess would be they're just using the shared documents area . There's a number of libraries on the desktop that let you access an API to write to the shared documents area. I'd guess they'd just be piping a mp4 feed to this and the iOS would just be reading from there.

ejstronge 12y ago
Is there any chance this approach could eventually be used on a Linux distro or Windows?
- kevin_thibedeau 12y ago
  The technology already exists in X11. The problem is getting devices to act as display servers.
  - ejstronge 12y ago
    I haven't seen examples of folks trying to use iPads (for example) as X11 displays, likely because it's outside my area of expertise. Do you know of any examples?
    - seanp2k2 12y ago
      Sounds like something that could only exist on Cydia. Has anyone checked there?
    - aaronem 12y ago
      iSSH includes an X11 display server, and I've had reasonable success using it with clients on an assortment of architectures, including a Tru64 VM running Open Genera. I wouldn't expect it to work well with something like video playback unless you've got a very fast and uncongested wireless network (or possibly a Lightning-to-Ethernet adapter, if such things exist), but if you don't need that kind of sustained responsiveness, it's at least worth a try.

iancarroll 12y ago

There's a working download link in the footer, not sure why.

iron_ball 12y ago
I downloaded the application, and it prompted a restart to install a driver, but did nothing further. duet.app does nothing when I open it, and plugging in my iPad does nothing either. Looks like we have to wait for the App Store release to install the iPad half of the app.
- drinchev 12y ago
  After installing, there is an icon in my menubar that says I should open duet on my iOS [1]. I believe we wait for the iOS app tomorrow and see what's the price and how this thing works 1: http://i.imgur.com/1fEHPLF.png http://i.imgur.com/1fEHPLF.png

xxyyzz3d 12y ago

https://news.ycombinator.com/item?id=8776877 https://news.ycombinator.com/item?id=8776877