[FFmpeg-user] Quantify Video Quality

Atish Kathpal atish.kathpal at gmail.com
Tue Feb 28 13:27:53 CET 2012

@ Andrey  yes, thats right. I am interested in finding if there is any
difference in quality of videos derived from an uncompressed (YUV) master
as against an AVI master. And I would like to put some numbers against that
quality, rather than having to manually look at the videos to know how they
differ in terms of quality.

Is there a tool to help me do that? Can FFmpeg itself report the
signal:noise ratios you talk about?


On Tue, Feb 28, 2012 at 3:11 PM, Andrey Utkin <
andrey.krieger.utkin at gmail.com> wrote:

> 2012/2/28 Jim Worrall <coniophora at gmail.com>:
> > It is hard to imagine that the quality of the final transcoded videos
> > could be improved by going from an uncompressed file through some
> > (unspecified) codecs in an AVI first.  I would assume that the final
> > file made directly from the YUV is better.
> >
> > To compare the quality, I would just look at a few samples.
> As i got the idea, the guy asks how can he calculate Signal to Noise
> Ratio in derived files.
> --
> Andrey Utkin
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