Re: ImageJ AVI export & JPEG compression

Posted by Wayne Rasband on Dec 10, 2009; 8:13pm
URL: http://imagej.273.s1.nabble.com/Re-ImageJ-AVI-export-JPEG-compression-tp3690125.html

 > Hello I think I am having a small issue ImageJ AVI export &
 > JPEG compression :
 >
 > The quality factor for JPEG is not used: selecting 10 or 90
 > does not affect the quality or the size of the resulting
 > movie.

I broke the JPEG Quality option when I replaced
com.sun.image.codec.jpeg with ImageIO so that ImageJ could be compiled
with the OpenJDK. I removed the AVI Writer's JPEG Quality option in
v1.43n since it is not obvious how to specify the quality with ImageIO.
In any case, this option was confusing since it only applied to one out
of the three compression choices.

 > That JPEG compression option you added a few months ago is
 > great: It keeps a good quality and plays just everywhere
 > without having to install anything (windows, mac,
 > powerpoint windows & mac, quicktime....)

Michael Schmid should get most of the credit for ImageJ's ability to
read and write AVIs.

-wayne