Answers.Body: <p>Those horizontal lines you're seeing are what you would call <code>Interlacing</code> and it's usually done in an attempt to increase a video's frame rate without using more bandwidth (in other words, make it play smoother and take up less space).  You can easily get rid of this by running your video through a program like <a href="https://handbrake.fr/" rel="nofollow">Handbrake</a> and using their "Decomb" filter.</p>
  
  <p>There are other, more advanced methods to clean this up as well.</p>
  
  <p>I personally use <a href="https://www.blackmagicdesign.com/products/davinciresolve" rel="nofollow">Davinci Resolve</a> and I've read that you can even do it in <a href="http://www.videolan.org/vlc/index.html" rel="nofollow">VLC Media Player</a>, but I think handbrake is the quickest and easiest way to accomplish deinterlacing your video.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-05-20T07:50:11.570Z
Answers.Text: @nosyarg instead of encoding the video again thus loosing more detail and quality you should tell your friend to pick a better output format, **progressive** instead of interlaced if possible. While most programs should be able to detect interlaced content and display it without combing, interlacing remains a crude hack from the CRT era. AFAIK interlaced formats have been dropped with the move to UHD.
Answers.UserDisplayName: LiveWireBT
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-05-19T18:34:17.417Z
Answers.LastActivityDate: 2015-05-19T18:39:19.273Z
Answers.LastEditDate: 2015-05-19T18:39:19.273Z
Answers.UserDisplayName: Manly
Body: <p>I have been editing a video which has rendered fine up until recently, I had it in a .mp4 format on a windows machine editing using wevideo, and I sent it to my friend who edited it on a mac, I think using aftereffects, and converted it to a .mov and now it has this strange effect, but only when I download it to the local machine (by the way the black bars are fine, what I am confused about are the horizontal lines):</p>
  
  <p>before:
  <img src="https://i.sstatic.net/0c8na.jpg" alt="Before:"></p>
  
  <p>on my phone after:</p>
  
  <p><img src="https://i.sstatic.net/0HNKL.png" alt="enter image description here"></p>
  
  <p>on my computer after:</p>
  
  <p><img src="https://i.sstatic.net/WcG6j.png" alt="enter image description here"></p>
  
  <p>What could be going on and how should I fix it?</p>
  
  <p>thanks!</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-05-19T18:38:57.573Z
Comments.Text: Wrong encode settings? See @JohnManly's answer.
Comments.UserDisplayName: p2or
Tags: <video>
Title: video renders well on mac, but has bizarre effect on windows
UserDisplayName: nosyarg
ThreadText: # video renders well on mac, but has bizarre effect on windows
  
  (Asked by: username_0 on 2015-05-19)
  
  I have been editing a video which has rendered fine up until recently, I had it in a .mp4 format on a windows machine editing using wevideo, and I sent it to my friend who edited it on a mac, I think using aftereffects, and converted it to a .mov and now it has this strange effect, but only when I download it to the local machine (by the way the black bars are fine, what I am confused about are the horizontal lines):
  
  before:
  ![Before:](https://i.sstatic.net/0c8na.jpg)
  
  on my phone after:
  
  ![enter image description here](https://i.sstatic.net/0HNKL.png)
  
  on my computer after:
  
  ![enter image description here](https://i.sstatic.net/WcG6j.png)
  
  What could be going on and how should I fix it?
  
  thanks!
  
  **Tags:** video
  
  > **Comments:**
  > **username_1**: Wrong encode settings? See @JohnManly's answer.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2015-05-19. Score: 4 | Accepted answer
  
  Those horizontal lines you're seeing are what you would call `Interlacing` and it's usually done in an attempt to increase a video's frame rate without using more bandwidth (in other words, make it play smoother and take up less space). You can easily get rid of this by running your video through a program like [Handbrake](https://handbrake.fr/) and using their "Decomb" filter.
  
  There are other, more advanced methods to clean this up as well.
  
  I personally use [Davinci Resolve](https://www.blackmagicdesign.com/products/davinciresolve) and I've read that you can even do it in [VLC Media Player](http://www.videolan.org/vlc/index.html), but I think handbrake is the quickest and easiest way to accomplish deinterlacing your video.
  
  > **Comments:**
  > **username_3**: @username_0 instead of encoding the video again thus loosing more detail and quality you should tell your friend to pick a better output format, **progressive** instead of interlaced if possible. While most programs should be able to detect interlaced content and display it without combing, interlacing remains a crude hack from the CRT era. AFAIK interlaced formats have been dropped with the move to UHD.  
  
  ---
  
  