[MPlayer-users] Mencoder segfaults with DivX4

[René Bartsch]

MPEG4 compression ever needs a resolution which is a multiple on 16, as for MPEG4 uses sqares of  16 to 16 pixels for the motion
compensation.
This is also for DivX 4.xx! If you use values not dividable by 16, there can  be a huge loss of quality.

DivX 4.02 Linux and DivX 4.11/12 also do have bugs in the SSE functions, especially with deinterlacing ...

Rene


----- Original Message -----
From: "Michael Niedermayer" <michaelni at gmx.at>
To: <mplayer-users at mplayer.dev.hu>
Sent: Thursday, February 14, 2002 7:19 PM
Subject: Re: Re: [MPlayer-users] Mencoder segfaults with DivX4


> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hi
>
> On Thursday 14 February 2002 18:20, Arpi wrote:
> [...]
> > > divx4 seems to be buggy, it cant handle sizees which are not divisable
> > > through 2
> >
> > i think no one mpeg-like encoder can handle them, as they use yuv 4:2:0
> > (common u/v for every 2x2 pixel block)
> well, libavcodec does handle it, allthough i dunno if its mpeg standard
>
> generated with:
> ./mencoder ~/videos/Lord_Of_The_Rings-Teaser.avi -o lord2.avi -ovc lavc
> -lavcopts vcodec=mpeg4 -vc ffdivx -sws 1 -x 101 -y 101
>
> and played with:
> ./mplayer lord2.avi -vo x11 -nosound -zoom -x 103 -y 103
> yuv2rgb seems to have problems with it too, thats why the 103 is needed so
> the swScaler is used and not yuv2rgb
>
> divx4 cant play it but odivx & ffodivx can
>
> [...]
>
> Michael
>
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