From: Milton Aupperle <milton@outcastsoft.com>

Date: July 15, 2009 9:21:08 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] I think this is my best Jupiter image so far!


Hi Terrence;


In a word yes, Astro IIDC will want a movie.


It's been a long time since I used iMovie, but you should be able to save the captured video as a reference movie (unless Apple has dumbed it down even further and lost that ability). That will require basically no time to generate the movie, whereas using Export to movie which re-compresses may require a lot of time to compress and use up additional disk space.


However, be forewarned that iMovie captures video in an interlaced DV Video format, which has been 4:1:1 decimated and then 6:1 compressed with a Jpeg like DCT blocking codec. That means a lot of fine details get removed by the compression and there is nothing you can do about it. Also because it's interlaced video, any strong turbulence that was recorded will show up in the individual fields as line offsets on the disk edges, because they were taken at different time intervals. That's one of the main reasons that I stopped using analog cameras with the DFG/1394-1 A/D converter.


HTH..


Milton J. Aupperle



On 15-Jul-09, at 9:01 AM, Terrence Redding wrote:



Tim, very interesting.  I am interested in shooting images of the planets and did my first B&W this morning - well a movie.  So now I need to learn to stack the frames and produce sharp stills.  Can I do that by exporting from iMovie and importing to Astro-IIDC for stacking and processing?


Here is my first effort.  


Jupiter 090715 14" LX200R

http://gallery.me.com/tredding/100140


Enjoy the movie!