Sun May 02, 2021 3:54 pm
When I get red nodes, i immediately go back to frame 1, as they can also occur if your source clip is not long enough to reach the part of the timeline you are sitting on. If it isn't red on frame 1, but is red later on, you may have a source length issue.
If you have a 3 second source clip, and a timeline that is 10 seconds long, you could get red nodes after the 3 second mark.
Or as was stated earlier, you might not have a proper source plugged into the the node to complete the operation.