[MPlayer-users] Re: Changing aspect-ration of an AVI file without reencoding it...

[Arpi]

Hi,

> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> "CybEriC" <cyberic at free.fr> schrieb im Newsbeitrag
> news:m17tbtZ-001WatC at ViKinG.cyberic.dyndns.org...
> > I've already tried to do this with -ovc copy -oac copy -aspect xxx, but it
> did'nt change the ratio.
> > Is it now possible with the latest version, and is it related to:
> > # libavcodec: aspect ratio encoding support (mpeg4, mjpeg, h263?)
> 
> AVI container doesnt have an Aspect Ratio ( AR )  flag unfortunately, so you
> would have to reencode your movie to change it.

PLEASE stop re-posting this message (or is it an autoresponder bot?) every
time someone mention 'AVI' and 'aspect' in the same mail... it's boring and
not even valid and wrong list for advertising a not even finished fileformat

the aspect ratio info is handled by the video codecs, and just like mpeg
1/2, mpeg4 (aka divx) supports it too. and with mencoder you can put it into
avi container too, preserving the aspect ratio info inside the mpeg4 header.
the container does nothing with aspect, no matter if it's mpeg-ps (aka .vob)
or avi. yes, some containers, like .mov (and mcf?) has field for aspect
ratio, it's nice for video codecs not supporting aspect itself.


A'rpi / Astral & ESP-team

--
Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu