mirror of https://github.com/python/cpython
Adapted the world to the new VFile.py. Fixed bugs in Vplay.py:
missing -n in help(), bogus frame skipping; and added patch for weird time jumps. Removed colorsys.py (now in std library). Fixed "sys.write" error in vcopy.py. Restructured README.
This commit is contained in:
Guido van Rossum
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@ -26,7 +26,10 @@ a version of the Irix video library that supported capturing PAL
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format (in August 1992), Sjoerd added an interface to the video
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library to Python (sv) and Guido wrote Vrec.py (based upon a
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still frame grabber by Sjoerd, in turn based upon SGI demo code in C)
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to record a movie using it.
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to record a movie using it. Vrec was soon followed by modernized
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versions of the other programs (Vinfo, Vplay, Vtime) and an
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interactive editor (Vedit). Finally, VFile was rewritten for more
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modularity, functionality and robustness.
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Guido van Rossum
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Jack Jansen
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@ -36,6 +39,61 @@ to record a movie using it.
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Overview of files
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-----------------
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cmif-film.ms description of the CMIF video file format
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These are programs with a command line interface:
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Vrec.py record video movies using the Indigo video library and
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board
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Vplay.py play video movies
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Vinfo.py show statistics on movies
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Vtime.py (unrelated to vtime!!!) Copy a video file,
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manipulating the time codes (e.g. faster/slower, or
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regenerate time codes, or drop frames too close apart)
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Vedit.py interactive video editing program
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These modules are used by the above programs:
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VFile.py classes that read and write CMIF video files
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Viewer.py two viewer classes used by Vedit
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The following are C programs, either for efficiency or because they
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need to link with a C library:
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squash.c make a movie smaller by averaging pixels
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usage: squash factor [bits] <moviefile >newmoviefile
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factor x and y compression factor
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bits #bits left per sample in result (default 8)
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squash2.c make a movie smaller by dropping pixels
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usage: squash2 factor <moviefile >newmoviefile
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factor x and y compression factor
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tomono.c like squash2 but outputs a monochrome movie
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v2i.c convert the first frame of a movie file to SGI .rgb format
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link with -limage
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i2v.c convert an rgb file to "lrectwrite" format (this was
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used one time by the CMIF editor)
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These programs are obsolete, but kept around for sentimental reasons.
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Most either don't work any more because they don't use VFile and hence
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haven't followed the frequent changes in the CMIF video file format;
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or they are dependent upon hardware we don't have (SGI's previous
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generation framegrabber). Except for cam.py / tv.py, their
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functionality is present in the suite of programs whose name begins
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with 'V' listed above.
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cam.py network real-time tv broadcast; see tv.py
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usage: cam [packfactor [host]]
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specifying 'all' for host broadcasts
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@ -54,11 +112,6 @@ camcorder.py record video movies or make snapshots (in movie format)
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p pause recording (record single frame if paused)
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ESC quit
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Vrec.py record video movies using the Indigo video library and
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board
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colorsys.py color conversions, used by video
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statit.py various statistics operations on movie files
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syncaudio.py record audio synchronized with camcorder -a
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@ -84,43 +137,12 @@ video.py player for movies recorded by camcorder.py
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soundfile default is none (no sound)
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skipbytes byte offset in soundfile where sound starts
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Vplay.py similar but more modern, using VFile.py
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vinfo.py print summary of movie file(s)
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usage: vinfo [-d] moviefile ...
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-d print delta times (default: print abs times)
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Vinfo.py similar but more modern, using VFile.py
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vpregs.py definition of VP registers
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vtime.py virtual time module imported by syncaudio.py and camcorder.py
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Vtime.py (unrelated to vtime!!!) Copy a video file,
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manipulating the time codes (e.g. faster/slower, or
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regenerate time codes, or drop frames too close apart)
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Vedit.py interactive video editing program
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Viewer.py two viewer classes used by Vedit
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The following are C programs, either for efficiency or because they
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need to link with a C library:
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squash.c make a movie smaller by averaging pixels
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usage: squash factor [bits] <moviefile >newmoviefile
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factor x and y compression factor
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bits #bits left per sample in result (default 8)
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squash2.c make a movie smaller by dropping pixels
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usage: squash2 factor <moviefile >newmoviefile
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factor x and y compression factor
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tomono.c like squash2 but outputs a monochrome movie
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v2i.c convert the first frame of a movie file to SGI .rgb format
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link with -limage
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i2v.c convert an rgb file to "lrectwrite" format (this was
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used one time by the CMIF editor)
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colorsys.py color system conversions (now part of std python lib)
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@ -65,13 +65,7 @@ def process(filename):
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sys.stderr.write(filename + ': EOF in video file\n')
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return 1
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print 'File: ', filename
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print 'Version: ', vin.version
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print 'Size: ', vin.width, 'x', vin.height
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print 'Pack: ', vin.packfactor, '; chrom:', vin.chrompack
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print 'Bits: ', vin.c0bits, vin.c1bits, vin.c2bits
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print 'Format: ', vin.format
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print 'Offset: ', vin.offset
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vin.printinfo()
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if quick:
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vin.close()
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@ -15,6 +15,7 @@ def help():
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print '-d : write some debug stuff on stderr'
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print '-l : loop, playing the movie over and over again'
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print '-m delta : drop frames closer than delta msec (default 0)'
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print '-n : don\'t wait after each file'
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print '-q : quiet, no informative messages'
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print '-r delta : regenerate input time base delta msec apart'
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print '-s speed : speed change factor (default 1.0)'
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@ -137,13 +138,7 @@ def process(filename):
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return 1
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if not quiet:
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print 'File: ', filename
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print 'Version: ', vin.version
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print 'Size: ', vin.width, 'x', vin.height
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print 'Pack: ', vin.packfactor, '; chrom:', vin.chrompack
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print 'Bits: ', vin.c0bits, vin.c1bits, vin.c2bits
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print 'Format: ', vin.format
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print 'Offset: ', vin.offset
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vin.printinfo()
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gl.foreground()
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@ -211,6 +206,8 @@ def playonce(vin):
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time.millisleep(100)
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tin = 0
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toffset = 0
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oldtin = 0
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told = 0
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nin = 0
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nout = 0
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@ -247,11 +244,18 @@ def playonce(vin):
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except EOFError:
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break
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nin = nin+1
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if tin+toffset < oldtin:
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print 'Fix reversed time:', oldtin, 'to', tin
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toffset = oldtin - tin
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tin = tin + toffset
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oldtin = tin
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if regen: tout = nin * regen
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else: tout = tin
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tout = int(tout / speed)
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if tout - told < mindelta:
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nskipped = nskipped + 1
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if not threading:
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vin.skipnextframedata(size, csize)
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else:
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if not threading:
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try:
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@ -10,7 +10,7 @@ def report(time, iframe):
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print 'Frame', iframe, ': t =', time
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def usage():
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sys.write('usage: vcopy infile outfile\n')
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sys.stderr.write('usage: vcopy infile outfile\n')
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sys.exit(2)
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def help():
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