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Aspect Ratio doesn't keep
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Spoony [Avatar]
Newbie Private Message Joined: Jul 09, 2019 12:07 Messages: 2 Offline
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Im using powerdvd 19 trial version to play some blurays on my 2560x1440 monitor and since the bluray is 1920x1080, it should display at 1920x1080 with black bars, but it doesn't. It stretches the video to fullscreen on my monitor right to the edge. I have enabled "keep aspect ratio" in the setting but it still won't stay at 1920x1080 with black bars. Is there a setting im missing? I tried it with truetheater and without, doesn't make a difference.

This message was edited 2 times. Last update was at Jul 10. 2019 10:56

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QC2.0 [Avatar]
Contributor Private Message Joined: Apr 27, 2016 04:02 Messages: 329 Offline
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2560 / 1440 = 1.77777777777...
1920 / 1080 = 1.77777777777...

They are both 16:9 aspect ratio.

So, it is correct that the video will be fit to full screen without black bars no matter keep or not keep aspect ratio.
(unless your Blu-ray video is recorded in 2.35:1 wide ratio, then remanufactured into 16:9 frame by movie studio).

This message was edited 1 time. Last update was at Jul 10. 2019 21:14

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Interesting. First time I have seen someone "complaining" that they DON"T have black bars.

You're mixing up resolution and aspect ratio. 2560x1440 and 1920x1080 are both 16:9 aspect ratios. You must be thinking that 4K resolutions are all 21:9, but they are not. Here is a list of 21:9 resolutions:

21:9 aspect ratio: 2560×1080, 3440×1440, 5120×2160

Check here for more information: https://www.displayninja.com/what-is-aspect-ratio/

Dave

This message was edited 1 time. Last update was at Jul 11. 2019 01:56

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Spoony [Avatar]
Newbie Private Message Joined: Jul 09, 2019 12:07 Messages: 2 Offline
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Quote 2560 / 1440 = 1.77777777777...
1920 / 1080 = 1.77777777777...

They are both 16:9 aspect ratio.

So, it is correct that the video will be fit to full screen without black bars no matter keep or not keep aspect ratio.
(unless your Blu-ray video is recorded in 2.35:1 wide ratio, then remanufactured into 16:9 frame by movie studio).


So it doesn't keep aspect ratio even with the option enabled? What about non-16:9 ratio blue rays like 2.35:1? That option is greyout or is it only on the full version? I use VLC, MPC-HC and they both can do it. If i want to fix to fullscreen i know i can enable it but powerdvd just forces me to do it.
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QC2.0 [Avatar]
Contributor Private Message Joined: Apr 27, 2016 04:02 Messages: 329 Offline
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Do you really know what aspect ratio is?
It is simple calculation from video's length and width division.

To enlarge a 1920 x 1080 (16:9) Blu-ray video to fit in a 2560 x 1440 (16:9) monitor, the video aspect ratio is 100% identical to your monitor's aspect ratio.
Selecting Keep aspect ratio, or not select keep aspect ratio won't cause any differences in full screen playback.

Why there should be any black bars in playback when the video's aspect ratio is identical to the monitor's aspect ratio?




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Theorectically, there is NO non-16:9 commercial Blu-ray movies existed in the world because the standard specification of a Blu-ray video is in 1920 x 1080 pixels and 16:9 aspect ratio.

For some of 2.35:1 produced movies, to avoid any video distortion and correctly meet the Blu-ray video specification, the movie manufacturers will put the "2.35:1" video with black bars on top and bottom sides into the standard "16:9" Blu-ray video frame.

So, are the Blu-ray movies you played in powerdvd 2.35:1 produced?
This information will be printed on your Blu-ray movie box back.

If there is no 2.35:1 logo on the box, this movie should be encoded with a normal 16:9 video without putting any additional black bars.

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VLC and MPC-HC does NOT support commercial Blu-ray movie playback.
If they play a "16:9" video by keeping video aspect ratio on a "16:9" monitor in full screen mode, and the black bars are displayed during the playback, the black bars are program bugs that need developers to fix.

Take out your pen and paper that has already disposed in your campus life, and use a ruler to draw a 16:9 square to emulate how the video will be enlarged to fit in full screen on a 16:9 monior.

This message was edited 1 time. Last update was at Jul 11. 2019 06:51

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