VPX 13 - speed keyframing on a multicam object?

CR77 wrote on 12/20/2021, 3:46 PM

Dear community

Perhaps (another) novice issue on VPX 19.0.1.129

I used multicam mode on a scene that was shot with two cameras. Works great.

Then I wanted to play around with the speed a bit, i.e. let it go fast forward for part of the scene, so:

I grouped the objects of the sequence together
I added two keyframes in the first object of the resultant multicam-"sequence" and
used the Factor-slider to increase the speed at the second keyframe to 2.0 (without selecting "Maintain length")

Results:

all video objects of the multicam-sequence contain loads of keyframes (each on its relevant effect curve) at random locations
all video objects get crossfaded (instead of their simple cuts)
the master sound track gets even more garbled and goes out of sync with the master video track
Trying to undo has no effect, since the single "compound operation" apparently corresponded to more than 9 actions

Is that a bug or a feature? (of me overlooking something)

As a workaround, I'll first combine the multicam master video and audio tracks into a single MVX object and apply the fastforward effect on that.

Are there any better suggestions?

Many thanks, again.

Comments

browj2 wrote on 12/20/2021, 7:33 PM

@CR77

Hi,

Were you still in multicam mode when you did this?

What did you do with the audio?

John CB

CR77 wrote on 12/23/2021, 5:02 AM

Hi John

Sorry for not getting back earlier. The nativity play has a bit of a deadline...

TBH I had probably left multicam mode (being happy about the sequence of shots), but am not entirely sure.

However, multicam mode keeps crashing today...

I exported the movie I want from the bigger project and loaded into an otherwise emtpy one to save on resources.

But this error keeps coming back:

Suggestions welcome...

johnebaker wrote on 12/23/2021, 9:27 AM

@CR77

. . . . VPX 19.0.1.129 . . . .

Is this the correct version number fo the VPX 13 you have installed. The fix for the Qt5..... error message you have received was fixed with patch 19.0.1.123.

The latest patch 19.0.1.133, try updating to that to see if it fixes the issue.

John EB
Forum Moderator

CR77 wrote on 12/23/2021, 4:37 PM

Hi John, many thanks,

I'm at 19.0.1.133 by now.

The above error, and a host of others (details available on request) made the programme completely unstable this morning for no apparent reason, but multicam would lead to a crash within minutes, prgram would (also outside multicam mode) either crash or freeze.

Most of those woes seem to have come to an end by setting all hardware acceleration options (Import/Process/Export) to Microsoft's Warp instead of the default option.

(Unrendered) previews get a bit more hiccupy, esp. the sound, but happy to sacrifice that for stability!

johnebaker wrote on 12/24/2021, 1:40 AM

@CR77

. . . . end by setting all hardware acceleration options (Import/Process/Export) to Microsoft's Warp instead of the default option . . . .

That would suggest there is an issue with the GPU in the PC.

What is your omputer specification and program version, see this topic for what is required and please quote processor and graphics card make/model in full - I would suggest you put this information in your profile signature so we do not have to keep asking for it.

Are the graphics card drivers up to date?

What were the Program settings, Device options tab settings previously?

What are the resolution and format of the videos from the 2 cameras?

John EB
Forum Moderator