<p>There can be too many factors involved to properly answer your question. One is the image quality of the source footage, there are objective and subjective parameters influencing this. Examples:</p>

<ul>
<li>proper lighting</li>
<li>set design</li>
<li>image framing</li>
</ul>

<p>Etc.</p>

<p>Then there are technical parameters in the image aqcuisition involved:</p>

<ul>
<li>quality of the cameras sensor</li>
<li>quality of the post production (grading etc)</li>
</ul>

<p>Then there are parameters in the delivery:</p>

<ul>
<li>delivery Codec</li>
<li>compressibility of the images</li>
</ul>

<p>As for the "subjective" parameters, there are a lot of psychological things involved: a lot of people consider these things as "better" while really only being a matter of taste:</p>

<ul>
<li>sharpened image</li>
<li>enhanced contrasts</li>
<li>less grain</li>
</ul>

<p>So unless being more specific, your question IMHO cannot be answered. </p>

CC BY-SA 3.0
2016-03-27T09:15:16.293Z
2016-03-27T09:15:16.293Z
Hans Meiser
<p>I have seen many videos with nearly same size and same length, but the clarity of the video changes or differs. I wanted to know the reason or fact behind this.</p>

CC BY-SA 3.0
2016-03-27T06:17:35.313Z
The Q isn't clear. Are you asking about image quality or focus/DoF? Can you illustrate with screenshots?
Gyan
CC BY-SA 3.0
2016-03-27T06:44:59.237Z
I am asking about video quality. For instance, consider a video with two different type but the size is almost the same, then why is the one blurred then other?
Surendar
CC BY-SA 3.0
2016-03-27T06:49:49.803Z
Attach examples.
Gyan
CC BY-SA 3.0
2016-03-27T07:00:08.187Z
I always download the movies after 2-3days of realise with nearly 700MB thinking that it will be clear, and the same movie after a month with same size of nearly 700MB gives a more clear view to the one earlier download.
Surendar
CC BY-SA 3.0
2016-03-27T07:15:24.750Z
That probably comes down to source quality.
Gyan
CC BY-SA 3.0
2016-03-27T07:53:00.643Z
But anyways it is related to the question only.
Surendar
<video-quality>
Reason behind the clarity
Surendar
# Reason behind the clarity

(Asked by: username_0 on 2016-03-27)

I have seen many videos with nearly same size and same length, but the clarity of the video changes or differs. I wanted to know the reason or fact behind this.

**Tags:** video-quality

> **Comments:**
> **username_1**: The Q isn't clear. Are you asking about image quality or focus/DoF? Can you illustrate with screenshots?  
> **username_0**: I am asking about video quality. For instance, consider a video with two different type but the size is almost the same, then why is the one blurred then other?  
> **username_1**: Attach examples.  
> **username_0**: I always download the movies after 2-3days of realise with nearly 700MB thinking that it will be clear, and the same movie after a month with same size of nearly 700MB gives a more clear view to the one earlier download.  
> **username_1**: That probably comes down to source quality.  
> **username_0**: But anyways it is related to the question only.  

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## 1 answers

### Answer by username_2 on 2016-03-27. Score: 0 | Accepted answer

There can be too many factors involved to properly answer your question. One is the image quality of the source footage, there are objective and subjective parameters influencing this. Examples:

* proper lighting
* set design
* image framing

Etc.

Then there are technical parameters in the image aqcuisition involved:

* quality of the cameras sensor
* quality of the post production (grading etc)

Then there are parameters in the delivery:

* delivery Codec
* compressibility of the images

As for the "subjective" parameters, there are a lot of psychological things involved: a lot of people consider these things as "better" while really only being a matter of taste:

* sharpened image
* enhanced contrasts
* less grain

So unless being more specific, your question IMHO cannot be answered.


---

