Visual Basic and video

[Klaus Major]

Hi Jack,

> Klaus Major wrote:
>
>> revVideoGrabber <videograbbercommand>,optionalparameters  :-)
>>
>> How do you like this line ;-)
>> All this and more in the next version of RR.
>> And crossplatform, of course...
>  
> Okay Klaus - I'll bite! 

Ouch ! ;-)

> Do you really think that "videoGrab" is a part of Rev 2.0? 

I don't think so, i know !

> Do you think it would be able to import both digital (Firewire)
> and analog (some kind of USB deviee or PCI card?) 

I don't know about details (i do not have any video device yet,
although it is christmas :-(,   but on a Mac you can do it with 
Quicktime
and on windoze you have the choice of QT of "Video for windoze"

> Man - this could be very cool.
>
> Thanks - even if you are teasing -

No trick, no bluff, no fooling and no shit ;-)

> and have a tremendous holiday season!

Thank you and to you , too :-)

> Jack Rarick
> Braintree Athletic Systems

Regards

Klaus Major
k_major at os.surf2000.de

P.S.
This is the "videograbbercommands.txt" file from the last alpha-build 
of RR.

I don't think this is topsecret, so i will add it here in the PS...
(Please don't shoot me if it is...)

##############################################

revVideoGrabber <videograbbercommand>,optionalparameters

Video grabber command:
a) Open - opens the video grabber using quicktime or video for windows.
Specify the name of the stack, and rect of the video grabber window.

examples 1 - open video grabber at rect of image 1 with video for 
windows
revvideograbber "open",short name of this stack,"qt",rect of field 2
example 2 - open video grabber at rect of field 2 with quicktime

Quicktime is supported on Mac and Windows

b) Show - starts previewing/displaying video (but does *not save the 
video
data to disk*). For quicktime you need to call revvideograbber idle to 
give
QT sufficient processing time..this is not needed when using video for
Windows. Stops recording if recording was in progress

example -
revvideograbber "show"
repeat while recordvideo is true
       revvideograbber "idle" # give qt processing time
       wait for 1 millisecond with messages # handles any events
   end repeat

c) Idle - Gives Quicktime processing time to display video input source
(required to update display when previewing and recording). Does nothing
when using VFW, as Windows internally opens a seperate thread to do 
this.

d) Hide - Stops previewing/displaying video

e) StartRecording - Starts recording and displaying the video and saves 
to
specified filename on disk.

example -
revvideograbber "startrecording",<filename>

As stated above you need to give QT sufficent processing time while
recording using revvideograbber "idle"

f) StopRecording - stop recording video.

g) Dialog - displays the standard video recording dialogs for Quicktime 
or
Video for Windows.
The types of dialogs you can specify are compression, format, display, 
and
source. Neither QT or VFW supports all dialog types.

example - revvideograbber "dialog","compression"
revvideograbber "dialog","format"
revvideograbber "dialog","display"
revvideograbber "dialog","source"

h) Close - closes the video grabber. This stop recording..if recording 
was
in progress.  Should call on closestack to release memory used by video
grabber.

i) revvideograbber "grabimage",width of image 1, height of image
1,"videoimagedata"
set the imagedata of image "videoimage" to videoimagedata

The grabimage command grabs the current frame, and copies it to the
specified variable (videoimagedata) as imagedata (rgb, rgb). You can 
then
set the imagedata of an image.to display the frame. Useful if you want 
to
take a photograph.

##########################################

Sounds promising, doesn't it ?! :-)