Posted by
Michael Schmid on
Dec 11, 2008; 4:03pm
URL: http://imagej.273.s1.nabble.com/Avisynth-and-ImageJ-tp3694276p3694277.html
Hi Holger,
ImageJ can easily do many of the processing steps that you can
specify in an AVS file. So the question is how to get your files into
ImageJ.
As I understand it, the output of Avisynth is Video for Windows, so
you need some software that can read Video for Windows. I am not
aware of any ImageJ plugin that can do this (ImageJ reads AVI files
without using any Windows-specific routines - ImageJ works on many
operating systems that don't have these routines).
ImageJ does not interface to Windows codecs, so also the option of a
"fake AVI file" mentioned in the Avisynth FAQ won't work. Again, I am
not aware of any ImageJ plugin that could do this.
As far as I could find out, Avisynth can output to VirtualDub; so you
could have VirtualDub write an uncompressed avi format that ImageJ
can read. This will create very large files, however.
Currently, ImageJ cannot read YV12 video, which seems to be the
output of Avisynth without applying any format conversion. If
VirtualDub cannot convert to a raw format different from YV12, adding
YV12 support would not be too difficult.
Michael
________________________________________________________________
On 11 Dec 2008, at 16:05, Holger Goerlitz wrote:
> Hi all,
>
> I am establishing a 3D animal tracking project using video
> recordings in mpg2 formate. mpg2 streams seem to be tricky, but I
> have to use them... For this project, the position of the animals
> should be tracked by a user from frame to frame. Several tracking
> plugins exist for ImageJ; I was using MTrackJ for images so far.
> However, now I would like to be able to track the position not on
> subsequent images, but I would like to use directly the video-files.
>
> ImageJ allows to open avi-files via AVI Reader plugin, but not mpg2-
> files. However, there exists a very powerful video-editing software
> called Avisynth which can read a variety of video-files, process
> and edit them, and serve them to any other program, e.g. your
> favourite media player. Effectively, what you do is to open an
> Avisynth file (*.avs) in your media player. This *.avs-file only
> contains a few very simple lines of code containing the video-file
> name and all relevant video editing steps (e.g. deinterlacing,
> bobbing, cropping, contrast-adjustment,...). When opening this
> *.avs-file, Avisynth will in real-time process the video-stream and
> serve the video frame by frame to your media player, displaying you
> the processed video. The big advantage is that you can write one
> *.avs-file and easily edit each video, while watching or analysing
> them, without the need to do this manually for every single video.
>
> I was wondering whether anybody knows of plugins for ImageJ that
> allow to open such *.avs-files of Avisynth. Effectively, this would
> give ImageJ the capability to process all types of video-files that
> can be read by Avisynth, including all editing capability of
> Avisynth (difference frames, colour -, contrast -, luminance
> adjustment,... - simply everything Avisynth can do). I think that
> this would be an incredibly powerful tool for ImageJ, but I haven't
> found anything about it anywhere.
>
> I would be most grateful for any ideas, suggestions and help.
>
> I have never ever written any plugins for ImageJ (and don't yet
> know how to do it), but was wondering it it would be worth doing that?
>
> Best,
> Holger
>
>
>
> --
> Dr. Holger R. Goerlitz
>
> School of Biological Sciences
> University of Bristol
> Woodland Road
> Bristol BS8 1UG
> UK
>
> phone: +44 (0)117 95 45909
> fax: +44 (0)117 33 17985
>
[hidden email]