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I rendered a video in H.264 (with what was recommended in the accepted answer here in fact: Video Quality Loss after Rendering in VSE) but the rendered video was always blurrier and less contrasted than the original sequence. So I tried to not compress anything with having AVI RAW as the output format, but even that does not seem to preserve the video quality...

Attached is a picture comparing the two: the left one is the original sequence, the right one is the rendered video (H.264 or AVI RAW look the same).

I tried to play with options such as anti-aliasing, lossless output, the bitrate or even the GOP size but the result is more or less always the same and there is an obvious quality loss.

What could this be due to? I must mention that I'm on Ubuntu 14.04 with Blender 2.77, maybe this has something to do with codecs on my operating system? Or is this quality loss unavoidable, which would be very surprising to me..?

Many thanks,

enter image description here

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Assuming you didn't miss anything obvious (wrong resolution) I would recommend to render it out with a really high bitrate (24300k) and then use handbrake to compress it in a useful manner. The default bitrate of 6k is just way to low.

enter image description here

Also there may be a blur node hiding in your setup. Looking closely at the ladder on top of the mast it seems like everything is spread out by one pixel.(left original, right encoded)

enter image description here

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    $\begingroup$ Ok my bad it's the first time I use Blender for Video editing... You gave me a good hint with resolution (which of course is something obvious): I used the correct resolution (720p in my case) but I didn't notice this percentage bar right under the X and Y resolution... It was set at 50% and that was the problem... Thanks for your reply! $\endgroup$
    – G Viaud
    Commented Apr 8, 2016 at 12:50
  • $\begingroup$ I realize, I should have phrased that in a less offensive manner... It was not my Intention to make you feel bad. Glad I could point you in the right direction. $\endgroup$
    – miceterminator
    Commented Apr 8, 2016 at 13:59
  • $\begingroup$ No worries, I didn't take it badly at all, and I checked the resolution lead too hastily: it is I who felt a bit sorry to ask such a question here. Hopefully it will help someone else later. Thanks again. $\endgroup$
    – G Viaud
    Commented Apr 9, 2016 at 18:45

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