Put another way, it doesn't have the horsepower to do both. You may have to confirm with Sony but this sounds like it to me.
We are using Sony NX5U as one of our cameras for streaming a hockey game.
1. We send the video out via the SDI port at 1080
2. We simultaneously record on a SDHC card
a) When we record at 720 there are no issues
b) When we record at 1080, my guys say the video appears jittery in our streaming broadcast.
Could/should there be any correlation between the recording format and effect on the streaming feed via SDI ?
The SDI video out goes to an ATEM TVC mixer