<p>My laptop screen is <strong>1366x768p</strong> (WXGA, 16:9).</p>

<p>If the player (potplayer) zooms in on a <em>1080p</em> movie (which shows upper and lower black bars) up to <strong>125%</strong>, what effetive quality does the movie end up being?</p>

CC BY-SA 4.0
2020-04-18T06:41:26.140Z
That really depends on your definition of quality
stib
CC BY-SA 4.0
2020-04-18T09:14:32.517Z
@stib is the movie effectively still  Full HD?
GJC
CC BY-SA 4.0
2020-04-18T09:34:58.217Z
So the player is stretching the movie to fill the screen?
stib
CC BY-SA 4.0
2020-04-18T10:06:39.637Z
@stib no it's zooming in on the movie, just the opposite method
GJC
CC BY-SA 4.0
2020-04-18T12:12:23.057Z
That makes no sense, unless it makes the screen physically smaller.
stib
CC BY-SA 4.0
2020-04-18T15:05:34.110Z
@stib https://www.youtube.com/watch?v=p0G28wjqvLQ
GJC
CC BY-SA 4.0
2020-04-19T00:24:12.980Z
Yep, so it's stretching the movie to fit the screen. Since it's cropping off pixels, then you're not getting the full 1920x1080 raster. But here's the thing: on a 1366x768 screen, the highest resolution you can achieve is 1366x768.it will *never* be 1080p, there aren't enough pixels.
stib
CC BY-SA 4.0
2020-04-19T08:30:12.107Z
@stib if now the original movie is 720p, and the screen still  has a resolution 1366x768p. Is the movie still 720p after being proportionally zoomed in on up to 125%?
GJC
CC BY-SA 4.0
2020-04-19T12:36:10.143Z
Well it won't have gained any extra pixels, those 720 pixels will be interpolated to fit over 768 pixels (which is usually a lossy process), and pixels from the side will be cropped. Whether you could call it 720p or not is kinda a question of semantics.
stib
<video-quality><zoom><video-player>
Movie quality after zooming in
GJC
# Movie quality after zooming in

(Asked by: username_0 on 2020-04-17)

My laptop screen is **1366x768p** (WXGA, 16:9).

If the player (potplayer) zooms in on a *1080p* movie (which shows upper and lower black bars) up to **125%**, what effetive quality does the movie end up being?

**Tags:** video-quality, zoom, video-player

> **Comments:**
> **username_1**: That really depends on your definition of quality  
> **username_0**: @username_1 is the movie effectively still  Full HD?  
> **username_1**: So the player is stretching the movie to fill the screen?  
> **username_0**: @username_1 no it's zooming in on the movie, just the opposite method  
> **username_1**: That makes no sense, unless it makes the screen physically smaller.  
> **username_0**: @username_1 https://www.youtube.com/watch?v=p0G28wjqvLQ  
> **username_1**: Yep, so it's stretching the movie to fit the screen. Since it's cropping off pixels, then you're not getting the full 1920x1080 raster. But here's the thing: on a 1366x768 screen, the highest resolution you can achieve is 1366x768.it will *never* be 1080p, there aren't enough pixels.  
> **username_0**: @username_1 if now the original movie is 720p, and the screen still  has a resolution 1366x768p. Is the movie still 720p after being proportionally zoomed in on up to 125%?  
> **username_1**: Well it won't have gained any extra pixels, those 720 pixels will be interpolated to fit over 768 pixels (which is usually a lossy process), and pixels from the side will be cropped. Whether you could call it 720p or not is kinda a question of semantics.  

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## 0 answers

