Answers.Body: <h1>Monochrome</h1>
  
  <p><a href="https://i.sstatic.net/6q4gV.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/6q4gV.jpg" alt="monochrome"></a> <img src="https://i.sstatic.net/MoQKq.png" alt="original"></p>
  
  <p>One method is to use the <a href="https://ffmpeg.org/ffmpeg-filters.html#hue" rel="nofollow noreferrer">hue</a> filter to desaturate.</p>
  
  <pre><code>ffmpeg -i input -vf hue=s=0 -c:a copy output
  ffplay -vf hue=s=0 input
  </code></pre>
  
  <h1>De-haze (increase contrast)</h1>
  
  <p><a href="https://i.sstatic.net/RzX5M.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/RzX5M.jpg" alt="increase contrast"></a> <img src="https://i.sstatic.net/MoQKq.png" alt="original"></p>
  
  <p>The <a href="https://ffmpeg.org/ffmpeg-filters.html#curves" rel="nofollow noreferrer">curves</a> filter has several presets including a few that increase contrast. You can also make your own curves in Photoshop, export the ACV file and use it via the <code>psfile</code> option in the curves filter.</p>
  
  <pre><code>ffmpeg -i input -vf curves=preset=increase_contrast -c:a copy output
  ffplay -vf curves=preset=increase_contrast input
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-05-30T04:03:54.553Z
Answers.Text: Thanks alot for your answer @llogan, as per your answer monochrome effect is same as grayscale effect, can you make command like my monochrome out put?
Answers.UserDisplayName: Nikunj Paradva
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-05-30T07:31:09.640Z
Answers.Text: and second thing How to use ffplay for live preview in android, i am really stuck to do that in android. any solution?
Answers.UserDisplayName: Nikunj Paradva
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-05-30T17:28:04.730Z
Answers.Text: @NikunjParadva You are showing the sepia image from the link you provided (refer to the animation in the link), but you said you wanted monochrome which I assumed meant a grayscale.  Upon viewing the link again I see "monochrome" is actually a grayscale with more contrast. But now it seems you actually want sepia? I don't know anything about Android.
Answers.UserDisplayName: llogan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-05-29T19:05:52.620Z
Answers.LastActivityDate: 2019-05-29T19:05:52.620Z
Answers.UserDisplayName: llogan
Body: <p>I have a lots of searching but i coudn't find the FFMPEG command for Monochrome effect and Haze Effect on video.</p>
  <p><strong>Orignal</strong></p>
  <p><img src="https://i.sstatic.net/MoQKq.png" alt="orignal" /></p>
  <p><strong>Haze Effect</strong></p>
  <p><img src="https://i.sstatic.net/yDC8c.png" alt="Haze" /></p>
  <p><strong>Monochrome Effect</strong>  (This is not sepia effect)</p>
  <p><img src="https://i.sstatic.net/c3i4F.png" alt="Monochrome" /></p>
  <p>Your help would be appreciated.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-05-29T18:48:27.597Z
Comments.Text: How to increase contrast via command ?, and what about monochrome effect.?
Comments.UserDisplayName: Nikunj Paradva
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-05-29T18:50:21.463Z
Comments.Text: So I assume you want to increase the contrast for your effect you called "haze"? Did you use Photoshop to create these previews?
Comments.UserDisplayName: llogan
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-05-29T18:51:20.767Z
Comments.Text: yes if it got same result then it ll be fine.
Comments.UserDisplayName: Nikunj Paradva
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-05-29T18:56:27.890Z
Comments.Text: actually i found this effect from https://github.com/MasayukiSuda/ExoPlayerFilter, and it was a preview screenshot that and put it here. i am not making it in Photoshop.
Comments.UserDisplayName: Nikunj Paradva
Tags: <ffmpeg>
Title: How to Monochrome, Haze video Effect in FFmpeg?
UserDisplayName: Nikunj Paradva
ThreadText: # How to Monochrome, Haze video Effect in FFmpeg?
  
  (Asked by: username_0 on 2019-05-29)
  
  I have a lots of searching but i coudn't find the FFMPEG command for Monochrome effect and Haze Effect on video.
  
  **Orignal**
  
  ![orignal](https://i.sstatic.net/MoQKq.png)
  
  **Haze Effect**
  
  ![Haze](https://i.sstatic.net/yDC8c.png)
  
  **Monochrome Effect** (This is not sepia effect)
  
  ![Monochrome](https://i.sstatic.net/c3i4F.png)
  
  Your help would be appreciated.
  
  **Tags:** ffmpeg
  
  > **Comments:**
  > **username_0**: How to increase contrast via command ?, and what about monochrome effect.?  
  > **username_1**: So I assume you want to increase the contrast for your effect you called "haze"? Did you use Photoshop to create these previews?  
  > **username_0**: yes if it got same result then it ll be fine.  
  > **username_0**: actually i found this effect from https://github.com/MasayukiSuda/ExoPlayerFilter, and it was a preview screenshot that and put it here. i am not making it in Photoshop.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2019-05-29. Score: 4 | Accepted answer
  
  # Monochrome
  
  [![monochrome](https://i.sstatic.net/6q4gV.jpg)](https://i.sstatic.net/6q4gV.jpg) ![original](https://i.sstatic.net/MoQKq.png)
  
  One method is to use the [hue](https://ffmpeg.org/ffmpeg-filters.html#hue) filter to desaturate.
  
  ```
  ffmpeg -i input -vf hue=s=0 -c:a copy output
  ffplay -vf hue=s=0 input
  
  ```
  
  # De-haze (increase contrast)
  
  [![increase contrast](https://i.sstatic.net/RzX5M.jpg)](https://i.sstatic.net/RzX5M.jpg) ![original](https://i.sstatic.net/MoQKq.png)
  
  The [curves](https://ffmpeg.org/ffmpeg-filters.html#curves) filter has several presets including a few that increase contrast. You can also make your own curves in Photoshop, export the ACV file and use it via the `psfile` option in the curves filter.
  
  ```
  ffmpeg -i input -vf curves=preset=increase_contrast -c:a copy output
  ffplay -vf curves=preset=increase_contrast input
  
  ```
  
  > **Comments:**
  > **username_0**: Thanks alot for your answer @username_1, as per your answer monochrome effect is same as grayscale effect, can you make command like my monochrome out put?  
  > **username_0**: and second thing How to use ffplay for live preview in android, i am really stuck to do that in android. any solution?  
  > **username_1**: @username_0 You are showing the sepia image from the link you provided (refer to the animation in the link), but you said you wanted monochrome which I assumed meant a grayscale.  Upon viewing the link again I see "monochrome" is actually a grayscale with more contrast. But now it seems you actually want sepia? I don't know anything about Android.  
  
  ---
  
  