QLab 4.0.4 Release Notes
A decoding issue that could in some cases substantially lower video playback performance compared to version 3.
Video playback is now much more forgiving in cases when video buffers are not staying full; the best-available video frame will be rendered in lieu of halting updates entirely.
Certain specific cases where Video cues would be reloaded unnecessarily, causing playback to be delayed.
The integrated fade envelope on Audio cues now works again.
Display of integrated fade curves on MIDI and Network cues (although actual output was correct).
Prevent several windows from going full screen that should not be able to do so.
Several memory leaks.
When updating the “lock playhead to selection” general setting (via GUI or OSC), ensure that the selection is set to the playhead if they are supposed to be locked together.
QLab will now log current FPS playback rate for each running surface at log level 2.