[MEncoder-users] Aspect distortion converting dvb-t files

[José Gabriel Moya Yangüela]

Well, I said it was distorted using SCALE. I should have said it was
low-quality. Proportions are right, but pixels are stretched in an ugly
effect. I could try to make a screenshot, but it requires me to re-convert
the video, and it will require a bit of time.
I'll try to get that mp4box


2007/1/9, Justin Randall <jrrandall at gmail.com>:
>
> Can you post a screen shot? I believe you that it is distorted, but
> 720x576 should work for a 4:3 PAL image on a square pixel display.
> What is the format and container that you're converting to? AVI
> container has an option for aspect ratio, but it is ignored by many of
> the media players available, so it's not a good option. I'm not sure
> if you can use the mp4 container with mencoder, but if you can, then
> it stores aspect ratio settings quite well. Perhaps somebody else on
> this list would know more about that. The mp4 container uses the pixel
> aspect ratio, or PAR, and you can set it via mp4box with "-par
> 1=16:15".  16:15 is the PAR for 4:3 PAL video, 8:9 is the PAR for 4:3
> NTSC video. Good luck.
> Justin
>
> On 1/9/07, José Gabriel Moya Yangüela <josemoya at gmail.com> wrote:
> > The problem is: using scale=720:576 gets a distorted image. Could I use
> > monitoraspect or something similar?
> >
> > 2007/1/8, Nico Sabbi <nicola_sabbi at fastwebnet.it>:
> > >
> > > José Gabriel Moya Yangüela wrote:
> > > > Hello!
> > > >
> > > > I've got a problem converting pvr files.
> > > > When I play the original pvr recorded file, they are (gracefully)
> > > displayed
> > > > as a 4:3 movie, despite of video size:
> > > >
> > > > * Windows media player says video size is 480 x 576, aspect ratio is
> 4:3
> > > > (according to video size, it is 18:15)
> > > > * WinAmp says video size is 480x576, and says nothing about aspect
> > > ratio.
> > > > * Mediaplayer classic says it is MPEG2 Video 480x576 (4:3)
> > > > * mplayer says it is MPEG2 480x576  (aspect 2), but it gracefully
> > > > renders it
> > > > with correct aspect 4:3 (despite of mplayer -identify showing
> > > > ID_VIDEO_ASPECT=0.00)
> > > >
> > > > But, when I convert it, it has some chances to be rendered as 15:18
> > > > (portrait aspect, about 480x576) instead of 18:15 (576x480).
> > > >
> > > > If I use -force-avi-aspect, I see the desired 4:3 image in mplayer,
> but
> > > all
> > > > other media players show a 15:18 (portrait) video.
> > > >
> > > > I've tried aplying the "scale" filter, but it distorts the image.
> > > >
> > > > Sometimes aspect is corrected using 'mencoder pvr://file...' instead
> of
> > > > 'mencoder file...', but sometimes it does not work.
> > > >
> > > > I'm sure this strange 480:576 (15:18) aspect ratio has something to
> do
> > > with
> > > > dvb standards, because of all players showing correct aspect ratio
> when
> > > > file
> > > > is of type mpegpes, but failing when it is converted.
> > > >
> > > > Some hint?
> > > >
> > >
> > > upload a sample, please
> > >
> > > --
> > > "Without a frontend, mplayer is useless" - someone in mplayer-users
> > >
> > > _______________________________________________
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> > > MEncoder-users at mplayerhq.hu
> > > http://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
> > >
> >
> >
> >
> > --
> > Tengo poco tiempo para leer. Compré estos libros a peso. Ordené que me
> > trajeran una tonelada.
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> >
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-- 
Tengo poco tiempo para leer. Compré estos libros a peso. Ordené que me
trajeran una tonelada.