Mercalli and transitions AGAIN

[DH88Comet]

And once AGAIN I'm back again with the same old problem, Mercalli and transitions. I am sick to the back teeth with it. The last edition that worked was 2018, I bought 2019 and that is when things went wrong. So for the last two years I have been using 2018, fortunately Mercalli version 4 works on that. A few months ago however I bought version 2021 and was prepared for the usual crashes that always accompany a new version, but after a brief hiccup when it wouldn't install at all it went on and miracle of miracles it was stable. Even more amazing, Mercalli worked with transitions! I was over the moon.

Then two months ago I was editing some footage and the problem is back again. Simply put everything I shoot is hand held and requires some stabilisation, so I apply Mercalli. The type of footage also requires a crossfade transition between clip, when I do this Mercalli displays the 'Video Analysis required' label. If I re-analyse it it make no difference, the only way I seem to be able have transitions is to only apply Mercalli to every other clip, if they are adjacent the label is there.

I shoot using a Sony AX53, a Victure AC800 action camera and my Motorola Android phone. I doesn't matter whether it's all from one source or all the problem is still there and I can't even save the project as a 2018 version anymore.

[Davidk]

You may need to re-think your workflow a bit. It sounds like you apply mercalli to relevant clips, and then insert transitions - which affects the duration of the clips by overlapping them, effectively making each one shorter in duration and thus affecting the mercalli calculation.

Recall that the mercalli calculation depends on the duration of the clip it is applied to, so changing that duration by any means - and that includes transitions - means re-calculating the mercalli stabilization effect. And if you have clips adjacent to one-another that need stabilizing then you will get notices for every clip. As you seem to be saying.

So, change the way you work. Apply transitions first, trim clips if necessary, and apply mercalli LAST. If your clips are so unstable that you need the stabilised version to enable any meaningful edits to them, then you really will have to get used to doing stabilisation twice: first to to enable edit, and then to re-do it after edit.

[tletter]

... so changing that duration by any means - and that includes transitions - means re-calculating the mercalli stabilization effect. And if you have clips adjacent to one-another that need stabilizing then you will get notices for every clip.

Fortunately this is not my experience with VS2021 and Mercalli, i.e. adding or removing a transition between clips doesn't require a re-analysis.

The type of footage also requires a crossfade transition between clip, when I do this Mercalli displays the 'Video Analysis required' label. If I re-analyse it it make no difference, the only way I seem to be able have transitions is to only apply Mercalli to every other clip, if they are adjacent the label is there.

Are you using the proDAD Mercalli Pro 5.0 filter?

As a test, suggest that you try the following:

1. start a new project
2. add a video clip
3. allow VS to match the properties of the first clip
4. add a 2nd video clip
5. add the Mercalli filter separately to each of the clips and then run the Mercalli analysis on each clip
6. add a crossfade transition between clips
7. render the project using 'Same a Project Settings' option

Does the "Video Analysis Required" banner appear on the output? If you does, then you should share this test project so that others can exam the issue.

Note that Mercalli can experience problems if the frame rate of your project settings doesn't match that of the rendered video. For example, if your project settings are 30p and you're rendering at 60p, then Mercalli will display the "Video Analysis Required" banner on the output. However, if you render at 30p then the output will be banner free.

tletter
https://www.youtube.com/user/tletter

[DH88Comet]

In VS 2021 it's the Pro 5.0 version but I had the same issue in VS 2019 with the version 4 filter. My frame rate is always 25fps from my Sony AX-53 and 24fps from the action cam. The project that I started this time included three short drone clips which were running at 29.77fps, these did not require stabilisation.
I always allow VS to match the properties of the first clip but due to this problem I never get as far as rendering, but I will try what you suggest.

I have just tried a test project just using two clips and the result was the same although I did notice something that I hadn't picked up on before
I added the first clip and let VS adjust its properties to match, added the second clip, dragged Mercalli onto the first then second clip.
Ran Mercalli on the first clip using the Sony AX-53 camera optics in the drop down, then on the second clip, here I noticed that the first clip immediately required re-scanning (no transition had yet been applied).
I then applied the crossfade and as before the Mercalli analysis label appeared on the transition and remained there after rendering. I even redid the whole exercise using the standard 'Without Fisheye' camera optics in case that had an effect, the result was the same.

[DH88Comet]

Davidk,
I have tried it all ways, adding transitions before and after, doing alternate ones then coming back and doing the missed and the result is the same. One other thing that I've just noticed is that any clip say it needs to be re-analysed (see the attachment), is show a 'New Range' and a 'Previous Range', the numbers quoted 14:10 and 08:21 are the same for ANY clip regardless of the duration, what the hell does that mean? I've been seeing it for days and only just noticed.

[lata]

Did you apply the hot fix
https://forum.corel.com/viewtopic.php?p=389289#p389289

[DH88Comet]

I did not know that it was available, I have done so now and initial tests are promising. If this continues you have saved my head and my main PC screen (I was getting ready to stick my head through it with the frustration) and you have my eternal gratitude. Although I know VideoStudio well enough by now to realise that it may not last!

[pepegota]

No problem here as long as clips have identical characteristics.

[mpn]

Hello.
I am here because I just found this problem with my VS2021 Ultimate version. I tried using the same clip and dividing it in two and crossfading it. I tried crossfading (pushing the clips together rather than dropping a transition onto the clips.) and Mercalli asks for reanalysis every time. I have used Videostudio since 2009 and I like the way it works. Very intuitive program. I tried using the suggested patch and no difference. I will be sad to not have this program to use. A real loss. Hope I (or you) figure this out. Can't use it this way.
I do imagine I could render each and every clip, but I use lots of pieces at times. Hate to waste time like that.

Thanks for any fixes.

[lata]

Hello.
I am here because I just found this problem with my VS2021 Ultimate version. I tried using the same clip and dividing it in two and crossfading it. I tried crossfading (pushing the clips together rather than dropping a transition onto the clips.) and Mercalli asks for reanalysis every time. I have used Videostudio since 2009 and I like the way it works. Very intuitive program. I tried using the suggested patch and no difference. I will be sad to not have this program to use. A real loss. Hope I (or you) figure this out. Can't use it this way.
I do imagine I could render each and every clip, but I use lots of pieces at times. Hate to waste time like that.

Thanks for any fixes.

Are you using Mercalli Pro, view ? – About for version, I see 5.0.518.1

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