Video Pro X changes project frame rate to 20 for no discernible reason

eSonOfAnder wrote on 7/2/2023, 2:36 PM

Edit: added screenshots for each step in the process showing the issue.

This is 100% reproducible, at least for me, and I'm at a loss for what VPX is doing to cause this.

Create a new project, settings don't really matter but I usually create them at 1080p/59.94 Hz
- Verified that the movie settings are what they should be based on the new project dialog
Import a movie/clip with a different resolution / frame rate
On the confirmation dialog, hit Adjust to adjust the movie settings to match those of the clip
- The response on the subsequent dialog does not make any difference - I have chosen both Continue and Cancel, and it makes no difference
Go into the Movie settings
- The frame rate is now set to 20 Hz. Always.

I've done this multiple times now, and discovered it because every time I tried to export the movie for rendering, it had somehow decided to try and export at 20 Hz every time. I've verified that before import, the frame rate of the project is 59.94, and also that VPX sees the frame rate of the imported clip as 60, both in the clip properties and on the import dialog box.

PC and software details:

Video Pro X, Version 17.0.3.68
Windows 11 Home
Ryzen 9 5900x
32 GB RAM
Nvidia RTX 2080 Super

Comments

johnebaker wrote on 7/2/2023, 3:39 PM

@eSonOfAnder

I suspect that the video you are importing though indicated as being 60fps has a Variable framerate which is has an average framerate of ~ 20fps with a maximum of 60fps and this is what is causing the error.

You can check this by downloading and installing MediaInfo and analyse one of the clips causing the issue, see this tutorial on how to setup MediaInfo and analyse a video clip for all the data required.

In the Video section of the analysis if you see this line:

Frame rate mode: Variable

Then the video clip needs converting to Constant frame rate using a video converter such as Handbrake or AviDemux

If the video is Constant framerate then post the full MediaInfo analysis in a comment, a short sample clip - ~ 10 secs long - from the same camera would also help. Upload the clip to somewhere like Google Drive, Microsoft OneDrive or Dropbox or similar file sharing site and share the file so that anyone with the link can access it, and post the link in a comment - do not upload it to to the forum, Youtube, Vimeo etc - they will convert the file.

Tip: set the project up for the resolution and framerate you require for the final export, when loading video which has another resolution/framerate click Do not adjust when the dialog pops up.

John EB
Forum Moderator

browj2 wrote on 7/2/2023, 3:57 PM

@eSonOfAnder

The frame rate is now set to 20 Hz. Always.

I've done this multiple times now, and discovered it because every time I tried to export the movie for rendering, it had somehow decided to try and export at 20 Hz every time

Hz - really?

Named after Heinrich Hertz and abbreviated as Hz or illustrated as the f symbol, hertz equals one (0.00000000125) cycle per second, measuring the waves or frequencies of electric changes each second.

Please use frames per second or fps.

John CB

eSonOfAnder wrote on 7/2/2023, 7:00 PM

@eSonOfAnder

The frame rate is now set to 20 Hz. Always.

I've done this multiple times now, and discovered it because every time I tried to export the movie for rendering, it had somehow decided to try and export at 20 Hz every time

Hz - really?

Named after Heinrich Hertz and abbreviated as Hz or illustrated as the f symbol, hertz equals one (0.00000000125) cycle per second, measuring the waves or frequencies of electric changes each second.

Please use frames per second or fps.

John CB

Since you seem to be more interested in trying to be snide instead of helpful, let me correct you:

From a purely scientific measurement and definition of measurement standpoint 1 Hertz = 1 / 1 sec; the top value has no dimension to it at all. It is not cycles per second, and is absolutely not limited to electromagnetic waveform measurements.

If you don't plan on adding anything constructive to the conversation, I would suggest not adding whatever it is you are about to say.

eSonOfAnder wrote on 7/2/2023, 7:02 PM

@eSonOfAnder

Hi

I suspect that the video you are importing though indicated as being 60fps has a Variable framerate which is has an average framerate of ~ 20fps with a maximum of 60fps and this is what is causing the error.

You can check this by downloading and installing MediaInfo and analyse one of the clips causing the issue, see this tutorial on how to setup MediaInfo and analyse a video clip for all the data required.

In the Video section of the analysis if you see this line:

Frame rate mode: Variable

Then the video clip needs converting to Constant frame rate using a video converter such as Handbrake or AviDemux

If the video is Constant framerate then post the full MediaInfo analysis in a comment, a short sample clip - ~ 10 secs long - from the same camera would also help. Upload the clip to somewhere like Google Drive, Microsoft OneDrive or Dropbox or similar file sharing site and share the file so that anyone with the link can access it, and post the link in a comment - do not upload it to to the forum, Youtube, Vimeo etc - they will convert the file.

Tip: set the project up for the resolution and framerate you require for the final export, when loading video which has another resolution/framerate click Do not adjust when the dialog pops up.

John EB
Forum Moderator

The original video file is a constant frame rate, I created it myself through an OBS capture. That's fine, I have no intention of using the software again if your responses are par for the course in this forum for people looking for assistance.

AAProds wrote on 7/2/2023, 7:20 PM

@eSonOfAnder

Your screenshots are too small (large amount of black space sqeezing the actual window) so I can't see what they say but based on what you've described, the imported clip has a frame rate of 20fps, because when you click "Adjust", you are forcing the movie settings to match the clip settings.

We really need a readout from mediainfo, or a portion of the clip on Google Drive/Dropbx, to sort out what's happening.

FYI, there are two Johns here. I don't understand why JohnCB has an issue with fps/hz but JohnEB is a different person.

Former user wrote on 7/2/2023, 7:50 PM

@eSonOfAnder Hi, @johnebaker is genuinely trying to be helpful & totally offered his assistance, he is asking for details of the Media with MediaInfo which is a very useful tool & he also asked for a sample so that he could try it on his PC, what is your problem with what he asked of you? ,

I was looking at your media thumbnails that look like MKV screen captures (hard to see, they are very small because of the way you captured the screen) I guessed you'd used OBS which you've confirmed since then, OBS is well noted in other forums as being 'awkward', & converting the file is often the solution or at least a way around problems,

How did you set OBS to produce a constant frame rate?

I have found that my MKV files are constant frame rate, but when they are automatically reMuxed into mp4 (for Premiere Pro) that is where they become VFR -

Does VPX remux MKV files?

johnebaker wrote on 7/2/2023, 8:05 PM

@eSonOfAnder, @browj2

. . . . I have no intention of using the software again if your responses are par for the course in this forum for people looking for assistance . . . .

Given the initial information you provided the answer you have been given was the most likley cause of the issue you are having.

I also gave you a valid working solution to avoid this issue arising, it is the only way to avoid issues when mixing video with different resolutions and framerates.

Every time the Adjust option is selected on adding a video clip of different frame rate and/or resolution to the project settings, the project settings are going to be changed. This is by design and is a feature of many video editing software.

. . . . I created it myself through an OBS capture . . . .

Unfortunately there is a long history of issues with video created by OBS in this and many other video forums.

We need a sample video clip created using the same OBS parameters as the ones causing you issues for further testing, and the full MediInfo data of the OBS clip you analysed.

Regarding 'snide remarks', @browj2 is correct in that Hz is a measurment of frequency of audio and electromagnetic waves as proved by Hertz, and is also applied to other devices where a clock speed is stated.

It is not ,and never has been, a unit of measurement used to described the frame rate of film and video - the unit is frames per second.

Before this topic gets further out of hand, please read the Community rules in particular rules 1 and 7 - link is at the bottom of the page.

John EB
Forum Moderator

AAProds wrote on 7/2/2023, 8:31 PM

Nothing wrong with OBS, great for capturing straight to MP4 if you don't need lossless. Just need a degree to set it up (like Magix! 😂).

browj2 wrote on 7/3/2023, 9:02 AM

@eSonOfAnder

Hi,

Sorry if you interpreted my comment as snide. It was intended to be instructive and to avoid confusion as other readers of the forum may not understand what you meant when you used Hz for frame rate instead of frames per second (fps). I had to read your initial post a couple of times because I thought that you had problems other than frame rate.

My screen capture programs both give me variable frame rates, even though the settings are for 30fps. There is no setting in my capture programs to force constant frame rate.

For files from one program, under Windows Explorer properties, Details, they show as 30fps. However, when imported into VPX15, the properties show 15fps. The project settings are for 29.97fps but I am usually not asked if I want to change the frame rate to match the imported clip. However, sometimes I am asked, and I always select to not adjust the frame rate of the project. I do not want to change the project frame rate.

Note that if you accept to change the frame rate of the project, when you go to export the project the settings will automatically be set to the changed project frame rate. This is not what is wanted, so don't allow imported files to change the project frame rate. That is why your exports are not 59.94fps.

For my other program, looking at the properties of various files in Windows Explorer gives me frame rates like 29.37, 29.78 and others as 29. something, but almost never 29.97. After import, the properties always show 29.97, but I know that these files have a variable frame rate as I checked them using Media Info.

The above also occurred in VPX14.

However, VPX(14/15) does not like some of the files recorded by this second program and what happens is that the hard drive containing the file goes to 100% for 2 to 3 minutes, pretty much stopping me from doing anything on my computer during that period. Then, the program comes back until I read in another similar file. But, this does not happen with all of the files recorded with this program, just some of them.

Since I am aware of this, I don't take any chances and convert all recorded files to constant frame rate using Handbrake.

I do have many files that actually have a 20fps frame rates, as this is the frame rate used by the program for the 8/
Super8 mm scanner. Upon importing one of these into VPX15, I was not asked if I wanted to change the project frame rate so it stays at 29.97fps, even though the properties of the clip in VPX show 20fps in VPX. Checking under Effects, Speed, the frame is given correctly as 20fps.

As suggested by @johnebaker please post the details of your file given by Media Info.

Also, please upload to a file sharing site, a short (10-20 seconds) clip recorded with OBS that has the same problem when being imported to the timeline as you have described. Others can check to see if they have the same problem with VPX15 as well as VPX14, as some users have not upgraded yet. This needs to be the original file as recorded by OBS, not an export from VPX.

John CB