[FFmpeg-user] Misson, impossible?, Prescaling, a, video...

[meino.cramer at gmx.de]

Hi Francois,

thanks for your reply.
I also tried this but no success...

How did you do this?

Best regards,
mcc




Francois Visagie <francois.visagie at gmail.com> [12-10-25 08:44]:
> > -----Original Message-----
> > From: ffmpeg-user-bounces at ffmpeg.org [mailto:ffmpeg-user-
> > bounces at ffmpeg.org] On Behalf Of meino.cramer at gmx.de
> > Sent: 25 October 2012 07:23
> > To: FFmpeg user questions
> > Subject: [FFmpeg-user] Misson, impossible?, Prescaling, a, video...
> > 
> > Hi,
> > 
> > I want to play a viodeo on an embedded linux system. There is no graphics
> > hardware acceleration but the CPU is quiet capable.
> > 
> > The video I want to play does not have square pixels...(I think this is
> called
> > "anamorphic"???) and normally is scaled to have square pixels while
> playing
> > ... if hardware acceleration is available.
> > If this is done on my embedded system with software scaling I count the
> > frames while drinking coffee.... ;)
> > 
> > What I want to do is to pre-scale the video on my PC with ffmpeg in two
> > ways:
> > "De-anamorphic"-scaling from non-square anamorphic pixels to square "LCD-
> > friendly"-pixels. Then downscaling to the size of the LCD screen of my
> > embedded system (800x480).
> > 
> > Especially the first step gives me headaches...
> 
> Whenever I scaled video I ended up with square pixels. What I did was
> specify the new resolution, as well as the required Display Aspect Ratio.
> Hope this helps?
> 
> > 
> > How can I do this?
> > 
> > Thank you very much in advance for any help!
> > 
> > Best regards,
> > mcc
> > 
> > 
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