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Is it possible to change the pixel aspect without re-encoding?
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stib  
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 More options Apr 26 2012, 10:20 am
From: stib <s...@pureandapplied.com.au>
Date: Fri, 27 Apr 2012 00:20:38 +1000
Local: Thurs, Apr 26 2012 10:20 am
Subject: Is it possible to change the pixel aspect without re-encoding?
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The PAR is just set in the metadata isn't it? So it should be easy to
change without a re-encode?

There's something on the Wiki in the release notes for an older version,
but it seems to relate to MPEG2 only, and there's no instructions.

thanks
-stib

--
Sent from /dev/tty0


 
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Baptiste Coudurier  
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 More options Apr 26 2012, 11:28 am
From: Baptiste Coudurier <baptiste.coudur...@gmail.com>
Date: Thu, 26 Apr 2012 08:28:51 -0700
Local: Thurs, Apr 26 2012 11:28 am
Subject: Re: [ffmbc-discuss] Is it possible to change the pixel aspect without re-encoding?
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On 04/26/2012 07:20 AM, stib wrote:

> The PAR is just set in the metadata isn't it? So it should be easy to
> change without a re-encode?

> There's something on the Wiki in the release notes for an older version,
> but it seems to relate to MPEG2 only, and there's no instructions.

You can change mpeg-2 aspect ratio with a bitstream filter:
-vbsf mpeg2setdar <aspect>

--
Baptiste COUDURIER
Key fingerprint          8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA
FFmpeg maintainer                           http://www.ffmpeg.org


 
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stib  
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 More options Apr 26 2012, 12:07 pm
From: stib <s...@pureandapplied.com.au>
Date: Fri, 27 Apr 2012 02:07:51 +1000
Local: Thurs, Apr 26 2012 12:07 pm
Subject: Re: [ffmbc-discuss] Is it possible to change the pixel aspect without re-encoding?
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Thanks.

Any chance of it being implemented for other containers, or is it
impossible? Otherwise does anyone know of good command line tools for this
sort of thing?

-stib

On Fri, Apr 27, 2012 at 1:28 AM, Baptiste Coudurier <

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Baptiste Coudurier  
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 More options Apr 26 2012, 12:11 pm
From: Baptiste Coudurier <baptiste.coudur...@gmail.com>
Date: Thu, 26 Apr 2012 09:11:19 -0700
Local: Thurs, Apr 26 2012 12:11 pm
Subject: Re: [ffmbc-discuss] Is it possible to change the pixel aspect without re-encoding?
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On 04/26/2012 09:07 AM, stib wrote:

> Thanks.

> Any chance of it being implemented for other containers, or is it
> impossible? Otherwise does anyone know of good command line tools for this
> sort of thing?

Depends on the container, but this filters work on mpeg2 video essence,
not container.
If you want a feature like this, contact me for a quote :)

--
Baptiste COUDURIER
Key fingerprint          8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA
FFmpeg maintainer                           http://www.ffmpeg.org


 
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