In 4K 24fps video every second frame repeated >>> likely bug

[tpolakov]

Hi,
when I import a 24fps (23.976) 4K video from Sony A6600 in VideoStudio 2022, every second frame is repeated (looks like it's replacing the genuine frames from the file), so the video appears jerky both on playback and export.
I did choose to change the project settings to match the video in the prompt upon importing the file and checking with Mediainfo the exported file format (fps) matches the input file.
This does not happen in other editing programs - like Premiere Elements.
Anyone experienced the same?
Also trying to log a support ticket for this with Corel, but the dialog never closes when hitting Send. Is it just me or is their webpage broken?

Thanks
Tomas

[lata]

Hi
Please check your project properties from Settings – Project Properties / Settings (Alt +Enter) to make sure the frame rate is using 24 fps. View the right hand properties panel.
Your timeline clock should also use 00:00:00:023 the 023 being the maximum frames.
(000 being the first frame)

Please note – show messages is activated for the FIRST appropriate video added to the timelines.

To test, start a new project then import your video to the top track.
The show messages panel should show, choose “details” to view the settings, the right hand panel showing your videos properties, are they 24fps (23.976).
yes / ok will / should match those settings.

[tpolakov]

Hi Trevor,
yes, I am adding it as the first (and only) video to a new project. Alt-Enter shows the correct properties:
MPEG-4 Files
24 bits, 3840 x 2160, 23.976 fps
Frame-based
H.264 High Profile Video: 59998 Kbps, 16:9
48000 Hz, 16 Bit, Stereo
LPCM Audio: 768 Kbps

- although the Project format dropdown is set to Mobile for some reason.
The timeline shows correctly and goes to 23 frames each second.
I uploaded a small untouched source video here if you would like to check yourself: https://drive.google.com/drive/folders/ ... share_link
All I do is to drag it to a new project and answer yes to the prompt.
Then I step through the frames and each 3rd frame is a repeat of the previous one.
Thanks

[Ken Berry]

It would be useful if you could give us the Properties you see for the sample video you made available (thanks for that, by the way) -- especially the length of the video. I see it as being 7.508 seconds which, at the frame rate of 23.976 fps would give 180.011808 frames (or at 24 fps 180.192 frames). Otherwise the Properties are the same as those you give above.

I cannot detect any repeated frames. I also rendered it using Same As Project Settings and got exactly the same Properties, including the length. Again, no repeated frames.

[canuck]

I use a program that converts every frame in a video to a jpg file.
When used on your uploaded clip, it created 180 jpg files (as Ken has also found). Examining each jpg, I found no duplicate files except for the initial 12 or 13 frames. From the on, I can see that every frame is different.

After rendering though the duplicate frames appear so it seems that VS is the culprit

[Vendelin Zatko]

337 / 5 000
Výsledky prekladov
Good day - it did the same thing to me when exporting to MP4 FHD 25 frames per second. I struggled with the settings for two days. Then I came to it by chance. After installing SP2 it started doing this. You need to delete the entire VS2022, but everything. Reinstall without SP2. After that he won't do it again, I guarantee... Sp2 knows. Do not install anyone.

[tpolakov]

Maybe I was not entirely clear - the file I uploaded is the source file - so you could test importing yourself.
I am now attaching the rendered file. There is no effect applied whatsoever, just dragged to a new project, answered the prompt to adjust the project properties and rendered with "Same as project settings" (with smart render enabled even). The rendered file does show the problem.
https://drive.google.com/file/d/16rxYXq ... sp=sharing
Just to be clear - the number of frames stays the same, it only replaces every third frame with the previous one.

[tpolakov]

After installing SP2 it started doing this. You need to delete the entire VS2022, but everything. Reinstall without SP2. After that he won't do it again, I guarantee... Sp2 knows. Do not install anyone.

Oh, interesting, thanks! I would like to avoid that, but if that's the only option, I will try.

[tpolakov]

I cannot detect any repeated frames. I also rendered it using Same As Project Settings and got exactly the same Properties, including the length. Again, no repeated frames.

Interesting. Did you go through the frames one by one? As noted in another reply, for me, the number of frames stays the same, it only replaces every third frame with the previous one.
So original frame sequence
ABCDEF becomes ABBDEE

[tpolakov]

Good day - it did the same thing to me when exporting to MP4 FHD 25 frames per second. I struggled with the settings for two days. Then I came to it by chance. After installing SP2 it started doing this. You need to delete the entire VS2022, but everything. Reinstall without SP2. After that he won't do it again, I guarantee... Sp2 knows. Do not install anyone.

Yeah, just checked - it does it for any frame rate - even with the sample lake clip (but there is not much motion, so the jerkiness is not so apparent) - and you may be right it could have started after latest SP.
I haven't used the program for a while and I updated recently when I got my new camera.
I managed to log a support ticket using chat, so let's see what they come up with.

[Vendelin Zatko]

Reinstall and you'll see the image tearing stop.
It helped her...

[lata]

Sorry for my delay in my reply, just returned home after a short break, now have access to my pc and can download your sample.

I am having problems in using your video C0001.MP4, similar to your description.
My findings seem to contradict the other replies here.
I Inserted C0001.MP4 to VS 2022 and 2021 with same results
Shows the messages to match the project properties to use 23.976 fps

Nudging through the timeline by pressing the F key appears to show a duplicate frame -- similar to:-
a,b,b,c,d,d,e,f,f,j,h,h and so on, seems to indicate a duplicate frame.
Tried in both clip and project playback.

Like canuck I use a program called “Free Video to JPG Converter” which saves every frame as a jpeg image
Once the pan had started approx. image 15 all images were different, in sequence with no duplicates, indicates to me that the video should be ok.
I can only assume the duplicates seen are created by Video Studio
I’ll run more tests tomorrow

As for the sample lake video I have no problems, make sure your project properties are using 30 fps and not 24fps, You must set the project properties to match the video being used, especially the frame rate.

[Ken Berry]

OK -- I can now see the problem. When I made my statement above about not seeing the problem, I had gone only 12 frames frame by frame and not see any repeat. I realize now that would have been difficult since there was no movement at all in those 12 frames. It was only when I went on after that and movement to the right actually started, that I noticed that I got movement in the first two frames but the third remained still, then two more moving right, with the third remaining still; and so on.

And I can see the same thing, even more clearly, in the sample 360 video which comes with VS. That video is a H.264 mp4 at 1920 x 1080 and 30 fps. How strange.

[tpolakov]

Sorry for my delay in my reply, just returned home after a short break, now have access to my pc and can download your sample.

I am having problems in using your video C0001.MP4, similar to your description.
My findings seem to contradict the other replies here.
I Inserted C0001.MP4 to VS 2022 and 2021 with same results
Shows the messages to match the project properties to use 23.976 fps

Nudging through the timeline by pressing the F key appears to show a duplicate frame -- similar to:-
a,b,b,c,d,d,e,f,f,j,h,h and so on, seems to indicate a duplicate frame.
Tried in both clip and project playback.

Thanks for confirmation...

[lata]

Guys
I have just re-installed Video Studio without using service pack 2, now using Version 25.1.0.472
I no longer have any issues working with the sample, all frames show correctly with no duplicates.