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Flexible aspect ratio to avoid unwanted resize
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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Hello, vMix is a great and unique software, thank you developers, God bless you and God bless Australia !!!
I am not sure this is the right category.
Here is my question.
I am adding a new input - a video file which has the size of 672px x 256px
vMix is set to 1280 x 720 for output size, and output aspect ratio - widescreen.
So when I add the video, the real image size is distorted to 1280 x 542.
If vMix would keep the aspect ratio of the video, the new video size would be 1280 x 488
But I cannot set a custom aspect ratio and vMix is making the video bigger in height: should be 1280 x 488, but it makes it 1280 x 542
I saw a post how to keep the aspect ration of the static image: by using 'photos' when adding input, instead of 'image'.
Also I am aware that there is an option to go to 'position' and change the zoom to make the video to look as wanted. I tried to use zoom, but it is really hard to make the video to have exactly same aspect ratio as in original video. I don't know what values are displayed there while changing the zoom.
Does my issue have a better workaround than I already listed here? Or there is no solution and this could be considered as a feature request?
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Joined: 3/7/2012(UTC) Posts: 2,634 Location: Canada Thanks: 33 times Was thanked: 506 time(s) in 475 post(s)
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@ ihtus
Have you tried all "Aspect Ratio" options in the pull down menu? In particular, what happens when you choose "Source" or "Anamorphic"?
Ice
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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@IceStream, thank you for your reply. Here is what I get for the various available aspect ratio options: 1280 x 720 - Output Size (vMix -> Settings -> Display) 672 x 256 - original size of input video 1280 x 488 - expected non-distorted size. But this size I get when importing to vMiX: normal => 1280 x 364 (height smaller than needed) widescreen => 1280 x 542 (height bigger than needed) anamorphic => 1280 x 542 (height bigger than needed) Original size of input video Aspect ratio in vMix: normal: wide: anamorphic:
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Joined: 2/26/2013(UTC) Posts: 373 Location: London Thanks: 41 times Was thanked: 37 time(s) in 36 post(s)
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Hi ihtus,
Try to put this figure in the zoom if it will solve your problem 1.34 and remember to leave the video aspect ratio to "source"
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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@Damn2Good4U
thanks. With the most updated vMix I don't see "source" aspect ratio.. there is normal, widescreen and anamorphic only. Do you mean "normal"?
Zoom is a workaround, but that would be great if I could see pixels instead of weird numbers while I am changing zoom or position...
If I would see pixel values I would be able to adjust perfectly and accurately the image to original aspect ratio. Is there any way to see pixel values there?
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Joined: 2/26/2013(UTC) Posts: 373 Location: London Thanks: 41 times Was thanked: 37 time(s) in 36 post(s)
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I have just rechecked vMix v14.0.0.57 and the source is there with the normal, widescreen and anamorphic
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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wow... i downloaded several days ago and the version was 13.xxx Is 14.xx available for public download?
p.s. i am at work and cannot download and install right away, will do that at home.
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Rank: Advanced Member
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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The last version available for download is 13.0.0.142 Where can I download version 14?
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Joined: 6/4/2013(UTC) Posts: 308 Location: Germany Thanks: 1 times Was thanked: 57 time(s) in 49 post(s)
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Rank: Advanced Member
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Joined: 2/26/2013(UTC) Posts: 373 Location: London Thanks: 41 times Was thanked: 37 time(s) in 36 post(s)
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ihtus wrote:The last version available for download is 13.0.0.142 Where can I download version 14? I currently use 13 as my production version... v14 is still in a beta version... but at that. my v13 has the source.. maybe you have some missing files while installing vMix... please check
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Rank: Advanced Member
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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very weird... just fully uninstalled 13 and installed 14.0.0.57 (x64) and only have normal, widescreen and anamorphic. No 'source'... I don't know why is that... any ideas?
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Rank: Advanced Member
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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Now I found it... it is in the input setting, and yes I have source aspect ratio.
I combined all values of aspect ratio (source, normal, widescreen, anamorphic) from input settings with all values of aspect ratio (normal, widescreen, anamorphic) from general settings, but with no luck, in all combinations the image is distorted and is not kept in original aspect ratio :(
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Rank: Advanced Member
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Joined: 3/7/2012(UTC) Posts: 2,634 Location: Canada Thanks: 33 times Was thanked: 506 time(s) in 475 post(s)
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I am not all that familiar with anamorphic aspect ratio inputs in vMix or why your video is resized the way it is, other than maybe there is some sort of over scan dimensions it is detecting in the video. Perhaps Martin can chime in as to how vMix handles or conforms different sized inputs. In any event, I suspect using "source" should give you the closest proximity to the original and playing with the Y zoom slider might give you a little less vertical stretch if that is what you are after. If you don't mind my asking, what video format is your video file? Is it purely anamorphic?
Ice
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Rank: Advanced Member
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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The specific video I brought here is avi (mpeg4, xvid) 672 x 256.
But the distortion happens to any avi video I add.
Yes, you are right, source aspect ratio is the closest to original, but it is still distorted. I don't mind to adjust zoom if I would see dynamically changed values in PX, instead I see there some strange decimal values. If I would see PC in zoom => I would able to accurately adjust the size.
Martin, could you please consider to display PX while zooming?
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Rank: Advanced Member
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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thanks to Jesus, there is a workaround that helped me to achieve accurate and wanted results. If anyone need, I am sharing it with others. Hope that helps anybody. 1. Let's say your project size is 1280 x 720 (in settings, aspect ratio: widescreen) 2. Let's say your video size is 672 x 256 (in input settings, aspect ratio: source) 3. Calculate what would be video height if width stretched to 1280px width: 672 x 256 1280 x Z Z=(1280*256)/672 ~ 488 px So my new video size (for 1280 x 720 format) would be 1280 x 488 4. Make an PNG image 1280 x 720 with 1280 x 488 cropped in the middle, see pic below 5. Add your video to vMix input 1 6. Add your image to vMix input 2 7. overlay input with image over input with video 8. Click on Fullscreen (this is to have more accurate results) 9. Go to Video Input 1 settings 10. Go to Position and play with "Zoom Y". Adjust it with mouse and then with keyboard for more accuracy. On the fullscreen (in the background) you will see the effects right away. Adjust the video "Zoom Y" so top and bottom edges will reach red edges of the image.
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Rank: Advanced Member
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Joined: 3/7/2012(UTC) Posts: 2,634 Location: Canada Thanks: 33 times Was thanked: 506 time(s) in 475 post(s)
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@ ihtus
Out of curiosity, what is the final value of the Y Zoom? This will likely be consistent through all your videos, just as 1.345 is the zoom factor for 4:3 to 16:9.
Ice
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Rank: Advanced Member
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Joined: 8/25/2014(UTC) Posts: 33 Location: Toronto
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@IceStream
1) 672 x 256 video for 1280 x 720 vMix project size: Y Zoom = 0.904 2) 704 x 368 video for 1280 x 720 vMix project size: Y Zoom = 0.9315
The y-zoom would be the same if I would have same video size for all videos.
800 x 600 => 4/3 = 1.(3) asp ratio 672 x 256 => 2.625 asp ratio 704 x 368 => 1.913 asp ratio
So we have here 3 different aspect ratios => will have different y-zoom values.
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