We have virtual studio project and we need to record the show using aximmetry recording tools.
All tools failed to start recording in default setting and we need to change frame rate to 25 to start recording.
Also the recording also failed when we use real-time option.
Our setup, we have decklink card with one port as SD PAL output and other as 1080/50i inputs
You're probably using H.264 format.
Due to changes to the latest NVidia drivers recording interlaced video into H.264/265 with the NVENC codec is no longer possible.
We suggest using DNxHD instead when working in interlaced.