Hi,
Thanks for developing vMix, it's a wonderful tool !

I'm having trouble with additionals NDI outputs and vMix calls.

I need to record several vMix calls separately in order to make some editing after recording a program.
The problem is that when some vMix call encountered bad network conditions it freeze during 4 or 5 frames on the additionnal NDI output but not on the program. Then the records of the program and the call are out of sync. It makes video editing very difficult. I also have some guests recording at home with an audio recorder in order to get a good audio quality. But when I try to sync this audio with the recorded video of the call they get out of sync when freezes happen on the vMix call.

The workaround I found is to set the vMix calls as source for Output 2, 3 and 4 and to record ouput 1 for my program and outputs 2, 3 and 4 for the vMix calls. Then there is no freeze on my records and they are all perfectly synced until the end. But when I have more than 3 vMix calls I can not use this method.

Here are the steps to see the issue and the workaround :
- add a call on Input 1
- Activate additional NDI outputs
- set Input 1 as source for Output 2
- put input 1 on the program
- Open 3 instances of OBS
and set them up to record the NDI signals : NDI vMix output 1 : PGM, NDI vMix output 2 : vMix Call (workaround), and NDI vMix call xxxxx
- Start recording on the 3 OBS
- Clap your hands in front of your webcam
- start downloading/uploading a big file on your caller device until you get dropped frames or very bad video quality on your vMix call
- clap your hands again, talk or make some noise
- stop downloading
- clap your hands
- Stop recording on OBS
- Import the 3 recorded videos on an editing software like Adobe Premiere or Final Cut.
- Put the 3 videos on 3 different tracks on the same timeline
- sync the 3 videos with the first hand clap
- All the tracks are synced, but when the vmix call get bad, the NDI vMix call track is freezing and getting out of sync while it is not freezing on output 1 and 2
- I would expect that all the tracks keep synced together

I hope that's an easy thing to fix ;)

Thanks