Re: AVI, Virtual Stack, >1GB boundery?

Posted by Burger Wilhelm on Nov 26, 2008; 4:00pm
URL: http://imagej.273.s1.nabble.com/AVI-Virtual-Stack-1GB-boundery-tp3693422p3693452.html

Jesper,

if you can afford to process the video frame by frame (i.e., without
loading the entire video at once), I recommend to look at my MovieIO
package, to be found here:

http://staff.fh-hagenberg.at/burger/imagej/MovieIO.html

While processing the video, it only maintains a single ImageProcessor
and thus has a very small memory footprint. Examples demonstrate its
simple API, it works EITHER with JMF OR Quicktime. I have used it to
process long and large (even HD) videos. Hope this helps.

Regards,
Wilhelm

> -----Original Message-----
> From: ImageJ Interest Group [mailto:[hidden email]] On
> Behalf Of JesperSP
> Sent: Wednesday, November 26, 2008 4:01 PM
> To: [hidden email]
> Subject: AVI, Virtual Stack, >1GB boundery?
>
> Hi everyone,
>
> I'm trying to analyze some very large AVI movies in ImageJ. I
> thought I had
> everything covered when I found the "open as virtual stack" function.
> However, when I'm trying to open a 1.3GB AVI containing 15495
> frames of
> 348x256 it stops exactly at frame 11934 (348x256*11934 =
> 1063176192 bytes
> corresponding to just below 1GB). I have tried to tell the
> plugin that I
> only want to open frames 11900-15495, both as virtual and
> non-virtual stack
> and in this case it only opens frames 11900-11934. I managed
> to save all the
> frames as TIFs in a folder and then I was able to open all a
> virtual stack
> with all frames using the "Import"->"TIFF virtual stack..."
> function. I then
> saved the stack as AVI with PNG compression which resulted in
> a file of 552
> MB. I was able to load the resulting AVI file without any problems in
> ImageJ, both as virtual and non-virtual stack.
>
> My conclusion is that ImageJ (or Java in general?) cannot
> access positions
> beyond 1GB of files (under windows XP 32Bit).
>
> I'm going to be analyzing a lot of these very large files
> (possibly up to
> 14GB) in the future, so I would very much like to find a different
> workaround than saving all images as individual tifs or
> compressing movies.
> Is there a way to read AVI's larger than 1GB in ImageJ? If
> it's imposible
> under windows XP 32bit, is it then possible if I install a
> 64bit operating
> system (e.g. UBUNTU 64bit?).
>
> Suggestions are very welcome ....
>
> Cheers,
> Jesper
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