Faster Playback Rate video lags behind audio
I've had this issue for about 3+ years.
When I'm editing my videos, I hit `;` once to increase the playback rate so I can review the video faster.
The problem is that after maybe ~30 seconds of watching, the video starts to lag behind the audio, so I can't see what Im talking about. My fix is it hit space to pause it, and then play it again.
So it's not a problem with the video + audio drifting. They are always fine when played at 1x, or exported. It's the preview + playback.
My screen is 4k. It gets even worse when I also include a webcam feed. So it's almost like the computer (2019 2.3 GHz 8-Core Intel Core i9, 32GB Ram MBP) can't handle the playback but doens't want to drop frames?
Anyone else have this? A known issue?
Have you updated to ScreenFlow 9.0.7?
Please confirm that.
If so can you do a screen recording (video and audio of course) so we can hear what happens after 30 seconds or so.
Please include your timeline frame rate (lower right blue box shows that). If the file was imported please include the file's frame rate.
Thanks - I've recorded an example. It looks like it gets 12 seconds out of sync for every 1 min of video. It's very apparent when there is a talking head on screen and the audio is 12 seconds ahead of the video.
Looks like the FPS is 30.
And one more clarification - I am using the `L` key too speed up playback, not `;` as I originally said. '
Here is the video: https://www.youtube.com/watch?v=lyPLChbXf3w
A few more data points:
the mouse doesn't go out of sync (because I think screenflow saves theat data seperately), so often you see the mouse hover over something and then the hover effect lags 4-15 seconds behind.
I tried closing my laptop, turning off my second monintor and setting my resolution to 1920x1080. This caused my GPU usage to go way down, but the playback was even worse. It got to 32 seconds over 60 seconds of video.