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- Release 0.21, 25.07.1995 by Thomas Engel (tomi@shinto.nbg.sub.org)
-
-
-
- The NDCamera application
-
- ATTENTION..you need gnutar and gzip to unpack this package.
-
-
- WHAT's NEW IN 0.21:
- - NDCamera has a DO-port.
- - 2 Example apps show how to use it (e.g. grab from the commandline)
-
-
- This is a NeXTdimension based auto frame grabber which might help you to
- create NeXTIME movies or other image sequences.
- It follows the tradition of Icon.app, DVR.app and Capture.app which have
- been written some time ago but seem to be not supported anymore. NDCamera
- was developed under NeXTSTEP 3.3, always keeps only one frame in memory
- and allows resizing of the image before saving it to your disk.
-
- Use it with patience because the NeXTdimension's software is buggy!
-
-
-
- What it does
-
-
- It grabs images. Now that is basically all this app will do for you.
- Besides that it allows you to create .anim movies. Every frame is titled,
- numbered and stored as a Tiff file inside a specified directory.
-
- So you can use the app in different ways. Either as a "small, rarely updated"
- monitor or as a "single frame once a while" camera.
- When creating movies you can choose to record each frame by hand or use the
- continuous time-based grab feature. Whenever the frame count increase you
- have a short period of time to switch to the next frame. Some VCRs can even
- be set up to play a movie in slow motion. Thus syncronizing the VCR with
- the grabbing speed on the NDCamera could allow you to record long movie
- automatically.
-
- Still there are some problems with automatic recording. Sometimes it happens
- that the VCR switches to another frame while the ND is grabbing. This will
- cause bad image quality because the ND now might grab two subsequent video
- frames which will cause smear effects if the actors are moving fast.
- Resizing is also a none trivial aspect. Under certain size factors you will
- get a funny stripe pattern due to the interlaced frames.
-
- The NeXTcube is also a little slow at processing the single frames. Thats
- why for big images you won't even reach a rate of 1 fps. With fps rates
- turning to random (due to calculation delays) you will have a hard time to
- sync you VCR at all...so the savest way to advance the video tape is using
- the remote control and single frame stepping.
- But you might also choose the change the frame base rate (see the Release
- Notes for details).
- Syncing can be quite easy if you have a way to control the VCR by your
- computer. Then you can use the included commandline example which causes
- the NDCamera to grab a single frame by using distributed objects.
-
-
- The Package
-
- Version 0.21 comes in a package that includes:
-
- - NDCamera.app for NeXT hardware only. You need a NeXTdimension to use
- this app successfully.
-
- - An Examples directory containing a simple movie recorded using this
- app and a cheap video player plus two applications which allow show
- you how to do remote controlling of the NDCamera.
-
- - Online help...minimal
-
- - Full sourcecode
-
- - The documentation and an ASCII version (README) of this introduction
-
-
- ATTENTION: You need gnutar and gzip und unpack those files. Both programs
- come bundled with NeXTSTEP since version 3.2.
-
-
- On where to find the latest releases please see the 'About this Project'
- section.
-
-
- Features
-
- As a fun project this app does nothing special. After all some people might
- find it useful to create their private movies. The included example was
- created using the NeXTdimension and a cheap video player. Somehow the
- Dimension failed to grab certain frames which makes the movie a little
- un-smooth. This was most likely due to the fact that even one frame/sec
- was too much work and the poor Cube couldn't keep up with the input.
- If you want to record movies automatically you might enlarge the time
- between timed entries (see above).
- Here is what the app can do in the current stage:
-
- - Choose a video source and adjust its settings.
-
- - Grab single frames on a timed basis.
-
- - Scale the grabbed images and display them on the screen or save them
- to a .anim file.
-
- Some features will definitly be improved over time but there is definitly
- more useful work out here (if you have a desperate need for some features
- let me know anyhow).
-
-
- ATTENTION: The implementation of the NeXTdimension's software is a
- little buggy. Running at high frame rates or with a huge system load
- will most propably crash the WindowServer. Don't say you havn't been
- warned.
-
-
- For a complete description of known bugs see the Release Notes in the
- second chapter.
-
-
-
- About this Project
-
-
- Once the NeXTIME framework is documented (or I had the time to figure out
- some APIs on my own) I would like to include support for other output
- options. This could be just other file formats or even using the NDCamera
- as a NeXTIME video source.
- Time will tell but it will never be much more then an app to play with.
- The performance of the system is not high enough to allow realtime video
- grabbing. You definitly need some extra hardware for such a job...or some
- really fast machines.
-
- The latest version of this application will be available at the
- ftp.nmr.embl-heidelberg.de, ftp.informatik.uni-muenchen.de or
- ftp.cs.orst.edu anonymous ftp servers. There is a WWW page were you
- can find out more about the status of this...and all the other
- projects I'm working on:
-
-
- http://wwwcip.informatik.uni-erlangen.de/user/tsengel/
- Projects/Projects.html
-
-
- Compiling
-
- This version includes all the source code necessary to recompile the
- program from scratch. It does not come with all the libraries! You
- might need to get the MiscKit project (Version 1.4.0 or higher) from
- the archives.
-
- For more details on the MiscKit collection see the common NeXT ftp
- servers, get the Objective-C or NeXT FAQs or take a look at the
- EduSteps developer area:
-
- http://www.nmr.embl-heidelberg.de/eduStep/Developer/Kits/
- MiscKit/MiscKit.html
-
- If you would like to submit something to this collection you should
- contact the current maintainer: Don Yacktman <don@darth.byu.edu>
-
-
- In Case of Trouble
-
- If you have any questions you can contact me.
-
- Thomas Engel
- Netpunstr. 9
- D-90522 Oberasbach
- Germany
-
- E-mail: tsengel@cip.informatik.uni-erlangen.de
- tomi@shinto.nbg.sub.org
-
- (NeXTMail welcome)
-
-
-
- Warranty and copyright
-
-
- Copyleft
-
- All source code is distributed under the GNU General Public License.
- This does not apply to the ObjectWare used, which most likely comes
- with its own licensing rules (e.g. code that belongs to the MiscKit
- project).
-
- You are free to extend and modify this application. But don't
- redistribute a modified version under the same name unless I gave you
- the permission. I don't want to have different, confusingly
- incompatible versions running around the world.
-
- Anyway...comments are highly appreciated.
-
-
- No Warranty
-
- This software is provided 'as is' and the programmer is not
- responsible for any harm this program may cause. You - the user - are
- responsible for everything that may happen to your business,
- hardware, software, car, CD collection or what ever may be worth your
- attention or money. Using this product is at your own risk and your
- private fun.
-
- There should be no serious bugs inside but remember that a
- carbon-based unit did the coding.
-
-
- Travelware
-
- Like all my projects this app is free and should be considered as travelware.
-
- 1. Let it travel to as many people as you know.
-
- 2. Send me an E-mail or postcard if you use it. I will try to
- keep you informed about new releases.
-
- 3. If you have a free bed or some free space on your floor...give
- me a hint. I might come and visit you on my next trip to the
- US...locations on Hawaii, near Seattle or WhistlerMnt. (Canada)
- preferred.
-
-
-
- Enjoy it.
-
- Tomi
-
-
-