05/09/13 02:37:53 hOLs5baU
URLﾘﾝｸ(www.mplayerhq.hu)
DVDs and SVCDs (i.e. MPEG-1/2) files contain an aspect ratio value, which
describes how the player should scale the video stream, so humans will not have
egg heads (ex.: 480x480 + 4:3 = 640x480). However when encoding to AVI (DivX)
files, you have be aware that AVI headers do not store this value. Rescaling
the movie is disgusting and time consuming, there has to be a better way!
There is
MPEG-4 has an unique feature: the video stream can contain its needed aspect
ratio. Yes, just like MPEG-1/2 (DVD, SVCD) and H.263 files. Regretfully, there
are no video players outside which support this attribute of MPEG-4, except
MPlayer.
This feature can be used only with libavcodec's mpeg4 codec. Keep in mind:
although MPlayer will correctly play the created file, other players will use
the wrong aspect ratio.