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

[Francois Visagie]

> -----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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