user25116: I have a lots of searching but i coudn't find the FFMPEG command for Monochrome effect and Haze Effect on video.
Orignal

Haze Effect

Monochrome Effect  (This is not sepia effect)

Your help would be appreciated.

user1760: Monochrome
 
One method is to use the 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)
 
The 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


25116: <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.stack.imgur.com/MoQKq.png" alt="orignal" /></p>
<p><strong>Haze Effect</strong></p>
<p><img src="https://i.stack.imgur.com/yDC8c.png" alt="Haze" /></p>
<p><strong>Monochrome Effect</strong>  (This is not sepia effect)</p>
<p><img src="https://i.stack.imgur.com/c3i4F.png" alt="Monochrome" /></p>
<p>Your help would be appreciated.</p>
 1760: <h1>Monochrome</h1>

<p><a href="https://i.stack.imgur.com/6q4gV.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6q4gV.jpg" alt="monochrome"></a> <img src="https://i.stack.imgur.com/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.stack.imgur.com/RzX5M.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RzX5M.jpg" alt="increase contrast"></a> <img src="https://i.stack.imgur.com/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>
