home *** CD-ROM | disk | FTP | other *** search
- CMIF video tools
- ================
-
- This directory contains Python and C programs to manipulate files
- containing digitized video in the "CMIF video format".
-
- An introduction to using the basic tools is in the file "video.doc".
-
- A description of the video file format is in the file "cmif-film.ms"
- (troff/nroff -ms input).
-
-
- History
- -------
-
- We started this in October 1991, when we had a large framegrabber
- board on loan from SGI for a few weeks: we developed a movie recording
- program and added numerous features, including still frame capture and
- synchronous sound recording using a second machine (the machine
- holding the framegrabber board didn't have audio).
-
- During the following months, when we started using and processing the
- recorded film fragments, the "CMIF video format" was revised several
- times, and we eventually created an object-oriented interface for
- reading and writing various incarnations of these files, called VFile.
- (This module is also used by our flagship application, the CMIF
- editor, not in this directory but in /ufs/guido/mm/.)
-
- When we got our own Indigo entry-level video board (in June 1992) and
- a version of the Irix video library that supported capturing PAL
- format (in August 1992), Sjoerd added an interface to the video
- library to Python (sv) and Guido wrote Vrec.py (based upon a still
- frame grabber by Sjoerd, in turn based upon SGI demo code in C) to
- record a movie using it. Vrec was soon followed by modernized
- versions of the other programs (Vinfo, Vplay, Vtime) and an
- interactive editor (Vedit). Finally, VFile was rewritten for more
- modularity, functionality and robustness, and various other tools were
- added as needed. Also, new options were added to existing tools, and
- several new video file formats were added.
-
- Guido van Rossum
- Jack Jansen
- Sjoerd Mullender
-
-
- Overview of files
- -----------------
-
- cmif-film.ms description of the CMIF video file format (more than a
- little out of date -- read the source for VFile for
- more info about new file formats)
-
-
- These are programs with a command line interface:
-
- Vrec.py record video movies using the Indigo video library and
- board
-
- Vplay.py play video movies
-
- Vinfo.py show statistics on movies
-
- Vtime.py Copy a video file, manipulating the time codes (e.g.
- faster/slower, or regenerate time codes, or drop
- frames too close apart)
-
- Vcopy.py Universal video file copying tool. Can manipulate the
- time codes, change the type, size, and packfactor.
- Subsumes Vtime.py.
-
- Vmkjpeg.py compress an rgb or grey video file to jpeg[grey] format
-
- Vunjpeg.py expand a jpeg[grey] video file to rgb or grey format
-
- Vfix.py truncate the scan line width of a video file to
- a multiple of 4 ('grey' images only)
-
- Vedit.py interactive video editing program (uses the FORMS library)
-
- Vsend.py unicast or multicast live video as UDP packets
-
- Vreceive.py receive transmissions from Vsend
-
- Vaddcache.py add a "cached index" to a video file, for faster playing
-
- Vrecb.py like Vrec.py but uses "burst capture" -- somewhat specialized
-
- Dsend.py like Vsend.py but sends screen snapshots (to Vreceive.py)
-
- DisplayVideoIn.py Like LiveVideoIn.py but reads screen snapshots
-
- rgb2video.py combine a sequence of rgb image files into a CMIF video file
-
- video2rgb.py split a CMIF video file into a sequence of rgb image files
-
-
- These modules and files are used by the above programs:
-
- VFile.py classes that read and write CMIF video files
-
- Viewer.py two viewer classes used by Vedit
-
- LiveVideoIn.py live video input class, used by Vsend
-
- LiveVideoOut.py live video output class, used by Vsend and Vreceive
-
- imgconv.py Image conversion subroutines for rgb2video.py
-
- senddefs.py Defaults shared by Vsend and Vreceice
-
- watchcursor.py Generally useful module to define a watch cursor in GL
-
- VeditForm.fd FORMS' fdesign definition for Vedit's form
-