[MPlayer-users] use of libavcodec option aspect= and -vop crop

[D Richard Felker III]

On Wed, Feb 05, 2003 at 09:16:36PM +0300, Vladimir I. Umnov wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hello, Eric.
> 
> 
> EP> You do understand that if you encode with aspect, then mplayer is the
> EP> only viewer that can correctly playback the resultant file, as
> EP> has been stated many times on this list.  Much better to use scale IMHO.
> It's not true. You may write ".bsi" file for Bsplayer and all works
> fine. More over, many players can change aspect ratio manually.
> 
> I think using scale or not give different results on different source.
> I try encode resident_evil and the fith_element. In first case aspect
> give best result, but in second case I've to use scale (-sws 1, I like
> sharper picture) because bitrate was too small to encode large
> resolution.

Hmm, -sws 1 will hurt sharpness quite a bit. You should read the docs
on the different swscalers. Also be sure your w/h values are multiples
of 16; if not, that will reduce quality.

Rich