| Re: MP4/Animated GIF/JPEG woes....(Windows, IDL 8.1) [message #76870 is a reply to message #76869] |
Mon, 11 July 2011 10:16   |
Haje Korth
Messages: 651
Registered: May 1997
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Senior Member |
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I second, IDLffVideoWrite is the way to go. I recently used it to
create Quicktime-comptatible MP4 files fro a NASA Press Conference.
The example code (with some customization of course) worked
flawlessly. Haje
On Jul 11, 12:29 pm, Michael Galloy <mgal...@gmail.com> wrote:
> On 7/11/11 9:59 AM, Daft Pict wrote:
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>> I've just started collaborating with some planetary astronomers who
>> tend to use very different tools compared to us traditional
>> observational astronomers :-) It's fun but I'm trying to generate
>> products that they use (and I typically don't) and having some teeth-
>> gnashing moments and screaming at the IDL help pages....
>
>> 1). Creating an MP4 file from a stream of images - seems easy
>> according to the help pages and I duplicated the example code. The
>> resulting file is playable on my windows box using media player, but
>> not when using QuickTime on either windows or their Mac systems.
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>> 2) Animated GIFs again seem straightforward, except that write_gif
>> appears to reset my color table so I lose the color in overlays over
>> images. I pass in the current RGB values from the common block after
>> setting my tables but the gif file is B&W and the RGB arrays are all
>> reset!
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>> 3) Even tried animated JPEG since the help pages describes how to do
>> it, but the sample code doesn't work as I get an error when trying to
>> use the unit option even though it is described in the help....
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>> Venting over - if anyone has some suggestions as to what causes any of
>> these problems or have solved these issues, are please let me know
>> cheers - Brian
>
> Have you checked out the IDLffVideoWrite class in IDL 8.1? I
> occasionally do animations, but haven't had to since IDL 8.1 was
> released. The What's New says:
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> "High-quality Video Animations
>
> The IDLffVideoWrite class allows you to write images to a video file,
> with an optional soundtrack. You can create .avi or .mp4 video files
> with the IDLffVideoWrite class. By default, video streams in .mp4 files
> use the MPEG-4 codec, and audio streams in .mp4 files use the AAC codec."
>
> It uses FFmpeg which I have used in the past with great results.
>
> Mike
> --
> Michael Galloywww.michaelgalloy.com
> Modern IDL, A Guide to Learning IDL:http://modernidl.idldev.com
> Research Mathematician
> Tech-X Corporation
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