| Re: Convert animated GIF to MPEG [message #73870] |
Tue, 07 December 2010 07:41 |
penteado
Messages: 866
Registered: February 2018
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Senior Member
Administrator |
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On Dec 7, 5:05 am, Fred <fedef...@gmail.com> wrote:
> Routine WRITE_MPEG as easy as WRITE_GIF does not seem to exist.
For the lossy (though the quality level can be chosen) MPEG, you can
use the oddly named IDLgrMPEG class (why is it not IDLffMPEG?). For
lossless movies, you can make them MJPEG2000 with the IDLffMJPEG2000
class (with the reversible keyword, for lossless compression).
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| Re: Convert animated GIF to MPEG [message #73872 is a reply to message #73870] |
Tue, 07 December 2010 05:51  |
Kenneth P. Bowman
Messages: 585
Registered: May 2000
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Senior Member |
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In article
<a0bdc992-3d10-415e-b41f-8685a744cf9e@w2g2000yqb.googlegroups.com>,
Fred <fedefras@gmail.com> wrote:
> Hello,
> I produced with IDL an animated GIF with
> WRITE_GIF, 'data.gif', bytscl,r,g,b,/multiple
>
> I would like to convert it in MPEG or produce the MPEG with a
> similar .pro.
>
> Imagemagick last version should have solved the problem in the ffmpeg
> libraries but I have just downloaded the last MAC version and does not
> work. It gives
>
> convert: Delegate failed `"ffmpeg" -v -1 -mbd rd -flags +4mv+aic -
> trellis 2 -cmp 2 -subcmp 2 -g 300 -pass 1/2 -i "%M%%d.jpg" "%u.%m" 2>
> "%Z"' @ delegate.c/InvokeDelegate/1060.
>
> Routine WRITE_MPEG as easy as WRITE_GIF does not seem to exist.
>
> Does anybody have any idea how this can be done as fast as possible?
> Thanks
Are you sure that you want an MPEG? JPEGs and MPEGs are a lossy
compression scheme designed to give good compression for photographs,
but scientific graphics often have very different characteristics
from photos. It is usually easy to identify MPEG videos during
presentations by the ugly compression artifacts.
I have always used GraphicConverter to create animations on the Mac.
It is excellent shareware, so please contribute to its continuing
support by buying a license.
http://www.lemkesoft.com/
I usually write a sequence of images as PNGs and then use
GraphicConverter to create a MOV file using PNG compression.
PNG is a lossless compressor (similar to GIF, but newer). It
supports both 8-bit and 24-bit color.
The resulting files may be larger than MPEGs, but there are no
compression artifacts, and the resulting QuickTime file is
pretty portable, at least on Macs and Wintel.
Ken Bowman
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