4 ms·

Whoops, you're right that I didn't mention that. Connecting it to your Mac via Lightning makes the screen available as a video source.

philsnow 6y ago
This is great, thanks for pointing this out; I had jumped through a bunch of hoops trying out various camera streaming setups (RTMP mostly, held off on looking at NDI because I only wanted the additional camera angle for laughs), but I never got the latency under multiple seconds. I saw some people suggesting that wifi was causing the latency so I looked up some lightning->ethernet adapters before coming to my senses. OBS recognized my iphone as a video source with zero configuration, and zero latency (ish? low enough that I can't tell).
Cu3PO42 6y ago
Is it available as a video source directly in OBS? I know I can open it in QuickTime, but then you'd have to add a layer of window capture... Personally I'm looking for a Windows solution primarily, but if I can open it directly in OBS, I might just run my MacBook and use the NDI plugin from the parent to stream that video to my PC.
- jordanlewis 6y ago
  Yes, it pops right up in OBS as well as QuickTime and so on. Using another layer of window capture doesn't work very well as I'm sure you know - it gets super laggy!
  - Cu3PO42 6y ago
    > Using another layer of window capture doesn't work very well as I'm sure you know - it gets super laggy! Oh, don't I know. I last looked into this when I had to produce a video explaining the FLP theorem. In the end I opted to just TikZ everything and avoid the iPad route because I couldn't get anything working acceptably well. (Though I never tried just adding it as an video source directy, I assumed there had to be secret sauce in QuickTime.) Thank you so much for the info!
mrkwse 6y ago
To be fair I think the green screen whiteboard trick was a much more valuable tip, I've done a similar thing in the past but it's probably less intuitive/widely documented than how to make your device's screen appear.
chrisweekly 6y ago
... and eliminates the problematic wireless latency overhead.

philsnow 6y ago

This is great, thanks for pointing this out; I had jumped through a bunch of hoops trying out various camera streaming setups (RTMP mostly, held off on looking at NDI because I only wanted the additional camera angle for laughs), but I never got the latency under multiple seconds. I saw some people suggesting that wifi was causing the latency so I looked up some lightning->ethernet adapters before coming to my senses. OBS recognized my iphone as a video source with zero configuration, and zero latency (ish? low enough that I can't tell).

Cu3PO42 6y ago

Is it available as a video source directly in OBS? I know I can open it in QuickTime, but then you'd have to add a layer of window capture... Personally I'm looking for a Windows solution primarily, but if I can open it directly in OBS, I might just run my MacBook and use the NDI plugin from the parent to stream that video to my PC.

jordanlewis 6y ago
Yes, it pops right up in OBS as well as QuickTime and so on. Using another layer of window capture doesn't work very well as I'm sure you know - it gets super laggy!
- Cu3PO42 6y ago
  > Using another layer of window capture doesn't work very well as I'm sure you know - it gets super laggy! Oh, don't I know. I last looked into this when I had to produce a video explaining the FLP theorem. In the end I opted to just TikZ everything and avoid the iPad route because I couldn't get anything working acceptably well. (Though I never tried just adding it as an video source directy, I assumed there had to be secret sauce in QuickTime.) Thank you so much for the info!

mrkwse 6y ago

To be fair I think the green screen whiteboard trick was a much more valuable tip, I've done a similar thing in the past but it's probably less intuitive/widely documented than how to make your device's screen appear.

chrisweekly 6y ago

... and eliminates the problematic wireless latency overhead.