user5117: Maybe I'm mistaken, but a long while ago I seem to have read an article about comparing videos encoded by different codecs.
Basically what I think what was done, was to put them together in a timeline - and by use of some effects - "null" them so you could only see the difference.
Now that I'm writing it down, I'm not so sure anymore - but I just wanted to check if someone knows a way to efficiently compare codec compressions.

user31818: I can only think of 2 perspectives: industrial and recreational.
Industrial: visual examination is super expensive, you may take a look of how Netflix do the comparison https://netflixtechblog.com/performance-comparison-of-video-coding-standards-an-adaptive-streaming-perspective-d45d0183ca95
Recreational: you may check out youtube with codec comparison e.g. 

 or doom9 


Hope this answers your questions.

5117: <p>Maybe I'm mistaken, but a long while ago I seem to have read an article about comparing videos encoded by different codecs.</p>
<p>Basically what I think what was done, was to put them together in a timeline - and by use of some effects - &quot;null&quot; them so you could only see the difference.</p>
<p>Now that I'm writing it down, I'm not so sure anymore - but I just wanted to check if someone knows a way to efficiently compare codec compressions.</p>
 31818: <p>I can only think of 2 perspectives: industrial and recreational.</p>
<p>Industrial: visual examination is super expensive, you may take a look of how Netflix do the comparison <a href="https://netflixtechblog.com/performance-comparison-of-video-coding-standards-an-adaptive-streaming-perspective-d45d0183ca95" rel="nofollow noreferrer">https://netflixtechblog.com/performance-comparison-of-video-coding-standards-an-adaptive-streaming-perspective-d45d0183ca95</a></p>
<p>Recreational: you may check out youtube with codec comparison e.g. <div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/Rzi5QY30Cy4?start=0"></iframe>
            </div></div> or doom9 <div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/Ctjm1kxw-BM?start=0"></iframe>
            </div></div></p>
<p>Hope this answers your questions.</p>
