Re: JMF: Compose video from individual Images?

From:
Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups:
comp.lang.java.help
Date:
Sun, 10 Aug 2008 10:57:40 -0700
Message-ID:
<489f2c14$0$4012$b9f67a60@news.newsdemon.com>
Simon wrote:

Hi all,

is there a way to use the Java Media Framework to create a video from a
set of, say, BufferedImages (or anything on which I can create a
Graphics context)?

My application is this: I want to make an animation which I can paint on
a GUI component and export to an mpg or avi file. However, it takes
rather long to render the individual frames, so I cannot generate them
at realtime.

So far, what I can do is export a bunch of files to a temporary
directory and use command line tools to make this into a video, but this
is not very convenient because it consumes much disk space and is not
pure Java.

What I have found out so far: I can convert java.awt.Images to
javax.media.Buffers by using javax.media.util.ImageToBuffer. This Buffer
has a javax.media.format.RGBFormat for which there exist the following
Codecs:

com.sun.media.codec.video.jpeg.NativeEncoder
com.sun.media.codec.video.colorspace.JavaRGBConverter
com.sun.media.codec.video.colorspace.JavaRGBToYUV

I have also found the javax.media.protocol.PullBufferStream which I
could extend to return my thus generated Buffers in the read(Buffer)
method, but it looks like this does not help me much with my goal of
turning images into a video, right?

Are there any code examples/tutorials on the Web that do a similar thing?

Thanks for your help,
Simon


JMF is history. Sun isn't supporting it and Java 7 is supposed to be
starting a new media API.

That said, I don't know why you can't just do what you explained above.
  A BufferedImage is an Image so that should work just fine.

I haven't worked with JMF in a long time and can't really help you with
details. There may be somebody else on this list that is more current.
  There is another mailing list for JMF but I stopped reading it a
couple of months ago because there was never any traffic. I don't think
JMF is being used much any more.

--

Knute Johnson
email s/nospam/knute2008/

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