Auto transition (alpha) not functioning all the time.

[Stickygreen]

Last night I was working with Resolume, doing a theater style mostly cued up show, where I was relying on the auto transition feature (set about 50% using Alpha blend). Now I understand that I have to wait for the auto transition to complete before I can click the next clip and start another auto transition. Or this issue may arise, I have experienced that, and I understand this limitation..This was clearly not the case in this instance, as I had let the auto trans complete with plenty of time to spare, most of the clips I was using were almost 1 minute in duration.
What my issue was, when I clicked on another clip the auto transition function would not work, and would be a hard cut. It was intermittent though, auto trans worked for about 90% of the clips i triggered, but the few it failed were not nice. It really was messing up my show, as the hard cuts looked horrible with the slow dark music I was working with. About 10 minutes into the show I reverted to using the fade sliders manually as I couldn't risk another hard cut. Out of the maybe 30 auto transitions I triggered within that 10 minutes 3 malfunctioned and displayed a hard cut.


any idea what's going on here?

[Joris]

This happens when your incoming clip has alpha.

The fades work by fading in the incoming clip on top of the outgoing one. Then once the incoming clip is at 100% opacity, it simply cuts out the outgoing clip. All is fine and dandy, until you have an alpha channel in the incoming clip, showing the outgoing clip underneath.

The reason we don't do a regular crossfade is that that would ruin 95% of the transition and blend modes, they all require the outgoing clip to be at 100% opacity during the transition.

We'll be addressing this in Res 5, because it is indeed not a pretty sight. It's still a bit of a pickle though, we've wrecked our heads on figuring out a good way to do it, but it all comes down to hacks and half half solutions.

[iwein.reimerink]

Any temporary hacks we can use till then? disabling the alpha channel (black bg) fixes the hard-cut, but in quite a few cases i really want that aplha channel AND a smooth transition to my next clip

[Joris]

Currently, there are no workarounds that we know of.