I wrestled with the same problem when i first installed my phantoms. The issue has to be addressed by delaying the video, not audio. So the lipsync device posted above would not work.
I found this device which does allow video delay...up to a point:
https://is.gd/brYj6Z
Roland VC-1-DL Bi-Directional SDI/HDMI Video Converter with Delay and Frame Sync
And it actually worked....at the maximum video delay setting, it compensated for the ~150ms audio delay via Dialog.
But I eventually found the Phantom audio delay wasn't consistent. Sometimes it would be less...so I had to re-adjust the Roland. No big deal...
But sometimes it would be MORE delay than 150ms. And that was where the Roland simply could not offer any more buffer to delay the video feed. So that solution didn't work all the time.
It was a costly workaround that didn't work all the time so i returned it.
Now, I am using a Mac Mini from which I feed video sources (movies/TV/etc...) through VLC player. Here, VLC allows practically any video delay you can imagine by way of audio latency adjustment. And it is as simple to set the default audio delay (ie: -150ms), and then fine-tune in 5ms +/- increments with a few keystrokes on the fly.
So far, this has been perfect, if a bit excessive, to workaround the audio delay issue.
Hopefully this may help, although I'm also open to any "easier" ways to go about this
I found this device which does allow video delay...up to a point:
https://is.gd/brYj6Z
Roland VC-1-DL Bi-Directional SDI/HDMI Video Converter with Delay and Frame Sync
And it actually worked....at the maximum video delay setting, it compensated for the ~150ms audio delay via Dialog.
But I eventually found the Phantom audio delay wasn't consistent. Sometimes it would be less...so I had to re-adjust the Roland. No big deal...
But sometimes it would be MORE delay than 150ms. And that was where the Roland simply could not offer any more buffer to delay the video feed. So that solution didn't work all the time.
It was a costly workaround that didn't work all the time so i returned it.
Now, I am using a Mac Mini from which I feed video sources (movies/TV/etc...) through VLC player. Here, VLC allows practically any video delay you can imagine by way of audio latency adjustment. And it is as simple to set the default audio delay (ie: -150ms), and then fine-tune in 5ms +/- increments with a few keystrokes on the fly.
So far, this has been perfect, if a bit excessive, to workaround the audio delay issue.
Hopefully this may help, although I'm also open to any "easier" ways to go about this
