Rendered Clip - MERCALLI Warning Message

[RickMen]

I just rendered a 7 min clip. Within that project there are various clips (6-7) I have applied Mercalli Pro Stabilizer FX to the picture and it appears that wherever I applied the Mercalli Pro FX it has the "Video Analysis required" message over that section of the rendered clip. I'm not sure what's going on here. I have re-analysed the clips but the same warning message re-appears in the rendered clip.

Screenshot 2023-02-12 113956.png

[RickMen]

Is this the solution? My version of proDAD Mercalli is 5.0 (518). The facts are slightly different, I'm getting the message on the rendered clip only but not on the clips within the VSP project.
https://forum.corel.com/viewtopic.php?t=69776

[lata]

Strange, I just replied here, now the post is no more. here goes again.

Yes you should install the hot fix although I suspect you have already done so as your serial number shows, but give it a try

It could be the Project properties, they should match the Video properties, then when rendering use similar settings, certainly keeping the frame rates and size the same

Is there a discrepancy between the project , Video and render settings.

[RickMen]

Can I damage anything by installing the hot fix? I want to avoid having to re-install VS.

A problem occurred causing Analyse to be required again.
Installing the attached file gave me version 5.0.518.1
Tests showed the problem being fixed.

Yes you should install the hot fix although I suspect you have already done so as your serial number shows, but give it a try

My version is 5.0 (518) without the .1 on the end.

It could be the Project properties, they should match the Video properties, then when rendering use similar settings, certainly keeping the frame rates and size the same

Is there a discrepancy between the project , Video and render settings.

Out of the 7 affected clips 6 are the old AVI clips and 1 is a TOD clip. The Project properties are set to the TOD properties (the majority of the clips in the project are TOD files). Rendering is set to match project properties.

TOD Properties.png

AVI properties.png

[lata]

I have run further tests to try replicate your Mercalli issue using AVI 4:3 and MTS / Mpeg2
The only time I have an issue is when I mix the frame rates.
For instance Project properties set to 50P but render to 25fps. Quite a few tests using a variety of frame rates.
Each time I render using the same rate as the project then Mercalli is ok.
It was inconclusive if the frame size change from 1920 to 720 had any bearing on Mercalli, It may be a factor that the frame Size of 720 x 576 being anamorphic could cause problems.

If you were to set your project properties to DV-Avi then I think the AVI’s would be ok with Mercalli.
Converting the AVI video to the same format as Tod may be the way to go.

By the way, When you do Share there is no option for Tod unless Same as First Clip does that, so what are you choosing as your output settings.

[RickMen]

I have run further tests to try replicate your Mercalli issue using AVI 4:3 and MTS / Mpeg2
The only time I have an issue is when I mix the frame rates.
For instance Project properties set to 50P but render to 25fps. Quite a few tests using a variety of frame rates.
Each time I render using the same rate as the project then Mercalli is ok.
It was inconclusive if the frame size change from 1920 to 720 had any bearing on Mercalli, It may be a factor that the frame Size of 720 x 576 being anamorphic could cause problems.

Thanks for the insight. I then did similiar tests and got the same outcome. When I had a project (using set properties to first clip) with TOD only clips Mercalli was ok. Then I added AVI clips and Mercalli generated the warning message. I'll have to check whether I use to get the same issue with VS2018 (I don't recall that happening).

BTW - Your suspicion was right, I double checked, my version of Mercalli is 5.0.518.1 so I don't think the hot fix will fix the issue.

Mercalli 5.0 Screenshot 2023-02-13 053138.png

If you were to set your project properties to DV-Avi then I think the AVI’s would be ok with Mercalli.

DV-AVI is 4:3 and TOD is 16:9 so I will have potential issues there.

Converting the AVI video to the same format as Tod may be the way to go.

It's looking like that's the way to go or I just remove Mercalli for the DV-AVI clips.

By the way, When you do Share there is no option for Tod unless Same as First Clip does that, so what are you choosing as your output settings.

I used Same as First clip to initially set the project properties and then clicked Same as Project Settings.

Thanks Trevor for your assistance.

[RickMen]

Out of curiosity I tried out the (new to me) Mercalli RT FX on the DV-AVI clips within my test project (which has a mixture of TOD and DV-AVI) no warning message was generated. It appeared to work fine.

[RickMen]

Out of curiosity I tried out the (new to me) Mercalli RT FX on the DV-AVI clips within my test project (which has a mixture of TOD and DV-AVI) no warning message was generated. It appeared to work fine.

While the Preview of the clips looked okay after I rendered the project the DV-AVI clips with Mercalli RT didn't look so good, there was obvious (not sure if this is the correct technical term is) interlacing when objects in the clip moved. I don't think Mercalli RT is the answer.

[Ken Berry]

One possible reason might have to do with the fact that DV/AVI uses Upper Field First as its Field Order. This is opposite to most modern video formats which use Lower Field First. It could be that Mercalli FX is applying any fix first to the Lower field and then to the Upper, when, for that particular type of video, it should be doing the opposite. But I don't know of any way to reverse that in Mercalli.

[RickMen]

Thanks for the info Ken. I guess these sorts of issues will occur when mixing format types. So I'm back to my previous work-around either convert the DV-AVI to TOD or remove Mercalli.

[RickMen]

I'm still having the same original issue with Mercalli re "Video Analysis required" after I have "Analysis" the clip and rendered it. In this new project I'm not mixing clips, all the clips are the same format ie TOD format and the Project Setting was set to match to TOD format. I haven't applied the hot fix because I'm already on 5.0.518.1. I can't seem to identify the cause, on some clips Mercalli renders fine then other clips it doesn't, no obvious pattern.

I did an experiment where I had a 1 clip project (using the same offending clip from the project where it failed) and it rendered fine.

[lata]

Hi
It would not harm to run the fix, but given the version number it is already installed.
Are you applying any other filters or different edits to your Tod files, for instance do you use Speed settings on some clips.

Mercalli scans and compares every frame to the adjacent frame, changing the clips attributes will affect mercalli causing to analyse again. Difficult to id when project payback is ok yet rendering is a problem.

Post Updated
If you are able to create a short project and replicate this problem, can you share that with us so we can try to pin down just what is causing this.

[RickMen]

Hi Lata

I'm not keen on the hot fix as I don't want to potential stuff up anything else to do with Corel, but I'll give it some more thought.

I have not applied any other filters or edits to the offending TOD clips. Of course in the Project there are other clips that have other FXs and various edits applied to them but I can't see how that should affect the offending clips.

I will try to create a short project to replicate the issue.

[RickMen]

Lata - I sent you a PM & google link short project.

[RickMen]

After spending a few more hours experimenting with the short 1 clip project I notice that when I do not trim the clip and apply Mercalli it renders fine. However if I trim the clip using the scrubber then apply Mercalli I get the error message during rendering but not during Preview.