[MPlayer-users] Re: mencoder/crop => image distortion

[Stefan Sassenberg]

Jonathan Rogers wrote:

> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> D Richard Felker III wrote:
>
>> No, Jonathan. What it boils down to is a know-it-all newbie spouting
>> off crap without any understanding whatsoever of what video formats
>> and video compression are. There's not much more annoying than someone
>> who refuses to listen to quantitative facts (i.e. yv12 cannot be
>> cropped to odd sizes/offsets) and keeps trying to disguise those facts
>> as someone else's personal bias. Normally I try to be polite and
>> helpful on this list. I don't think I did anything ugly to provoke
>> you, but you seem determined to argue or undermine every point I make
>> about these technical matters, which should be explained by someone
>> who understands the logic behind them, not someone who says "Hey I
>> encoded with these options and it seems fine and I don't want to lose
>> one line of the image!!!" with no understanding of what he's talking
>> about...
>
>
> I was trying to end the discussion, but sure enough you showed your 
> true colors. There's nothing worse than a know-it-all (well I don't 
> exactly how much you know, but it's not everything) person. I admit 
> that I was naive in my original replies, but I do want to learn. I did 
> learn some from your explanation. I admit that I can be quite 
> argumentative, but you're clearly no slouch yourself.
>
> I admitted that I wasn't sure about the issue and simply related my 
> experiences. All you could do was call my judgment into question. You 
> basically said, "I know how it works, so if you observed something 
> different, you're either blind or a liar." It could be that cropping 
> to an odd dimension destroys the image on your setup or did at one 
> time, but that's not what I've observed. I haven't made up my mind 
> though, so I'll experiment some more.
>
> Visual quality is a subjective measure, so you can't make absolute 
> statements about it without observation. You tried to make a similar 
> claim on the audio frequency resampling issue. Then there's the issue 
> of using a constant qscale for a first pass with lavc. You've insulted 
> the manpage writer for recommending it, though various people 
> (including me) have gotten better results that way.
>
> As I said before, you know much more about the technical aspects of 
> this subject than I do, but I'm neither blind nor stupid. The fact 
> remains that you're an arrogant asshole who talks like he knows 
> everything. I call your judgment into question, not because of a lack 
> of intelligence, knowledge or experience, but because of your titanic 
> ego. From now on, I will take everything you say with boulder of salt 
> since you can't ever admit that you might have been just the slightest 
> bit wrong. Notice that I haven't said you're wrong on this particular 
> issue, just that you haven't carefully enough considered it before 
> passing judgment.
>
> Jonathan Rogers
>
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>
Dear arguers,

regardless of this list being something like "your" list, I'd like you 
to ask to continue discussing that in a less public place than this list.

I rarely take part in discussions but I follow many of the threads with 
big interest - as long as I do not get too many off topic posts. And 
these postings are (not only but also) definitely off topic.

Thank you very much.

Stefan