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

Eric Potter ericp at earthlink.net
Wed Feb 5 18:30:16 CET 2003

On Wed, 2003-02-05 at 07:35, Chris Sincock wrote:
> I am still not sure which is the best way to go, ie
>    - leave the bands, no (or conservative) cropping and use aspect=
>    - crop the black stuff, do a bit of calculation, rescale one 
>      dimension, and use aspect=
> or - crop the black stuff and just rescale the movie to the correct
>     size, and don't use aspect=
> I eventually went with option 1 after trying the different methods
>  as it looked to me like it produced the best video quality for a 
>  given bitrate.
> originally I just tried aspect=<a calculated value> to correct the
> difference, but it only accepts a few fixed aspects.

You do understand that if you encode with aspect, then mplayer is the
only viewer that can correctly playback the resultant file, as
has been stated many times on this list.  Much better to use scale IMHO.

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