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>用了越多的濾鏡, 畫質會下降得越利害, 所以一般來說, 盡量減少使用濾鏡才能提升畫質
以往我也相信這套理念:
Well, do what you want, but you will never gain anything from it.
It is a transformation, and you will ALWAYS loose quality on a transformation.
The best quality you can get is storing exactly the same resolution, so 720x480 if it is NTSC. What you can do is crop the black bars if there are, of course.
Every filter you must apply (as resizing, for example) can be done on playback, it should be no problem for a current computer, and less for a computer in five years... but there are always better algorithms, etc. so probably if you store it with maximum quality (no resizind nor filtering), you can get better visual aspect applying realtime filters when playing finve years from now that you would get if you apply this filters now and effectively ruin your sources for always.
但再看看:
While it is fully correct that every single filtering step inherently looses information from the input source, you cannot draw a dogma out of that. Unless you prefer to make yourself a jester by insisting on that point of view.
In case you didn't notice, I'm not talking of quick'n'dirty resizing here, but of (agreed slow) image processing.
In the source there is not only useful information, there is also bogus information like noise, and other things that can hardly be reproduced anyways but that do confuse the encoder.
I'd say if I process a source, and in the end I've lost 1% detail, but at the same time reduced unrelevant information by 80% and increased compressability by 20%, then there is a "plus" standing under the line, not a "minus".
而且傳統相信的所謂 "處理/放大不可能增加 detail" 雖然正確, 但細節還是可以用不同的方式表現的, 例如你想以 1280*1024 fullscreen 播放, 如果你有足夠的容量 (90min 放在1 dvdr 上), 那 iip 之類的 script 可以幫助你更準確的控制這 resize 過程, 達到你想要的效果, 是不是浪費全視乎你的要求
(在 "要求 dvdrip 以標準 resol'n 製作" 的貼已說過這點, 全部要點可參考:
http://forum.doom9.org/showthread.php?t=85220 )
而且再需要說明的是, iip 不是單純的 sharpen, 它只會針對 edge 做 sharpen (edge enhancement), 非 edge 的部分會 return 經 dust denoise 的畫面
>騙眼睛
如果能做到這樣, 容我這樣說: 何樂而不為
[ Last edited by yanyani989 on 2005-11-5 at 03:44 ] |
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发表于 2005-10-24 23:44
)，说明这里应该可以讨论rlz的rip。（不像doom9，呵呵）
。ls(),ls2()等滤镜相比之下也就相形见绌了。
发表于 2005-10-26 16:58
楼主
发表于 2005-10-28 18:55
但是我想大概有一种思路或者某个标准