Audio / video out of sync
I'm using Screenflow 9.0.3 on a Mac mini with OS 10.15.5
I'm capturing video from a Canon DSLR, via HDMI out to a Mirabox HD USB 3.0 HSV325 Capture Box, connected USB-C direct to the Mac
I'm capturing audio from a Blue Yeti microphone via the USB3 hub in my Dell monitor, to the USBA port on the Mac.
The camera is setup for 1080P 29.97fps NTSC output. I am capturing at 30fps in Screenflow. After some troubleshooting, this seemed to get me the most reliable frame rate with one unique image on every frame in the timeline.
But my audio is roughly 5-6 frames ahead of my video. This seems to stay constant eg both capture at the same speed. Though I have not done a test longer than ~30 seconds.
I've tried uninstalling the Telestream driver and not capturing desktop audio and/or video but it doesn't seem to help.
Any ideas? Thanks
Steve Kirby said:
But my audio is roughly 5-6 frames ahead of my video.
When using separate devices for video and audio they may be offset because they are different signal paths. Ideally, you'd want your audio to go through your camera.
The Telestream audio driver is specific to capturing computer system sound and has no impact on audio coming in through USB devices.
It's possible that you could make a feature request to allow you to enter a delay offset to account for the different latency in the different signal paths.