VFile: added new formats 'jpeg' and 'jpeggrey'. Decompression is done
using module 'jpeg' by the Displayer class. (Unfortunately it's too
slow for real time.) Print file size in printinfo() method.
Vinfo: added -t option (terse -- one line per file) and usage message.
Vtime: use BasicV{in,out}File classes -- the minimum needed.
Vmkjpeg, Vunjpeg: new utilities for jpeg (de)compression.
diff --git a/Demo/sgi/video/Vmkjpeg.py b/Demo/sgi/video/Vmkjpeg.py
new file mode 100755
index 0000000..19c51d6
--- /dev/null
+++ b/Demo/sgi/video/Vmkjpeg.py
@@ -0,0 +1,92 @@
+#!/ufs/guido/bin/sgi/python
+
+# Compress an rgb or grey video file to jpeg format
+
+
+# Usage:
+#
+# Vmkjpeg [infile [outfile]]
+
+
+# Options:
+#
+# infile : input file (default film.video)
+# outfile : output file (default out.video)
+
+
+import sys
+import jpeg
+sys.path.append('/ufs/guido/src/video')
+import VFile
+
+
+# Main program -- mostly command line parsing
+
+def main():
+ args = sys.argv[1:]
+ if len(args) < 1:
+ args.append('film.video')
+ if len(args) < 2:
+ args.append('out.video')
+ if len(args) > 2:
+ sys.stderr.write('usage: Vmkjpeg [infile [outfile]]\n')
+ sys.exit(2)
+ sts = process(args[0], args[1])
+ sys.exit(sts)
+
+
+# Copy one file to another
+
+def process(infilename, outfilename):
+ try:
+ vin = VFile.BasicVinFile().init(infilename)
+ except IOError, msg:
+ sys.stderr.write(infilename + ': I/O error: ' + `msg` + '\n')
+ return 1
+ except VFile.Error, msg:
+ sys.stderr.write(msg + '\n')
+ return 1
+ except EOFError:
+ sys.stderr.write(infilename + ': EOF in video file\n')
+ return 1
+
+ try:
+ vout = VFile.BasicVoutFile().init(outfilename)
+ except IOError, msg:
+ sys.stderr.write(outfilename + ': I/O error: ' + `msg` + '\n')
+ return 1
+
+ info = vin.getinfo()
+ if info[0] == 'rgb':
+ width, height = vin.getsize()
+ bytes = 4
+ format = 'jpeg'
+ elif info[0] == 'grey':
+ width, height = vin.getsize()
+ pf = vin.packfactor
+ width, height = width / pf, height / pf
+ bytes = 1
+ format = 'jpeggrey'
+ else:
+ sys.stderr.write('Vmkjpeg: input not in rgb or grey format\n')
+ return 1
+ info = (format,) + info[1:]
+ vout.setinfo(info)
+ vout.writeheader()
+ n = 0
+ try:
+ while 1:
+ t, data, cdata = vin.getnextframe()
+ n = n + 1
+ sys.stderr.write('Frame ' + `n` + '...')
+ data = jpeg.compress(data, width, height, bytes)
+ vout.writeframe(t, data, None)
+ sys.stderr.write('\n')
+ except EOFError:
+ pass
+ return 0
+
+
+# Don't forget to call the main program
+
+main()