Renamed Vrecc to Vrecb (*b*urst mode capture).

This commit is contained in:
Guido van Rossum 1992-12-23 15:41:38 +00:00
parent 6bc8c7f3e2
commit 6e0e668d1c
1 changed files with 281 additions and 0 deletions

281
Demo/sgi/video/Vrecb.py Executable file
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#! /ufs/guido/bin/sgi/python-405
#! /ufs/guido/bin/sgi/python
# Capture a continuous CMIF movie using the Indigo video library and board
# Usage:
#
# makemovie [-r rate] [-w width] [moviefile]
# Options:
#
# -r rate : capture 1 out of every 'rate' frames (default 1)
# -w width : initial window width (default interactive placement)
# -d : drop fields if needed
# -g bits : greyscale (2, 4 or 8 bits)
# -G : 2-bit greyscale dithered
# -m : monochrome dithered
# -M value : monochrome tresholded with value
# -f : Capture fields (in stead of frames)
# -n number : Capture 'number' fields (default 60)
#
# moviefile : here goes the movie data (default film.video);
# the format is documented in cmif-film.ms
# User interface:
#
# Start the application. Resize the window to the desired movie size.
# Press the left mouse button to start recording, release it to end
# recording. You can record as many times as you wish, but each time
# you overwrite the output file(s), so only the last recording is
# kept.
#
# Press ESC or select the window manager Quit or Close window option
# to quit. If you quit before recording anything, the output file(s)
# are not touched.
import sys
sys.path.append('/ufs/guido/src/video')
import sv, SV
import VFile
import gl, GL, DEVICE
import al, AL
import time
import posix
import getopt
import string
import imageop
import sgi
# Main program
def main():
format = SV.RGB8_FRAMES
rate = 1
width = 0
drop = 0
mono = 0
grey = 0
greybits = 0
monotreshold = -1
fields = 0
number = 60
opts, args = getopt.getopt(sys.argv[1:], 'r:w:dg:mM:Gfn:')
for opt, arg in opts:
if opt == '-r':
rate = string.atoi(arg)
if rate < 2:
sys.stderr.write('-r rate must be >= 2\n')
sys.exit(2)
elif opt == '-w':
width = string.atoi(arg)
elif opt == '-d':
drop = 1
elif opt == '-g':
grey = 1
greybits = string.atoi(arg)
if not greybits in (2,4,8):
print 'Only 2, 4 or 8 bit greyscale supported'
elif opt == '-G':
grey = 1
greybits = -2
elif opt == '-m':
mono = 1
elif opt == '-M':
mono = 1
monotreshold = string.atoi(arg)
elif opt == '-f':
fields = 1
elif opt == '-n':
number = string.atoi(arg)
if args[2:]:
sys.stderr.write('usage: Vrec [options] [file]\n')
sys.exit(2)
if args:
filename = args[0]
else:
filename = 'film.video'
v = sv.OpenVideo()
# Determine maximum window size based on signal standard
param = [SV.BROADCAST, 0]
v.GetParam(param)
if param[1] == SV.PAL:
x = SV.PAL_XMAX
y = SV.PAL_YMAX
elif param[1] == SV.NTSC:
x = SV.NTSC_XMAX
y = SV.NTSC_YMAX
else:
print 'Unknown video standard', param[1]
sys.exit(1)
gl.foreground()
gl.maxsize(x, y)
gl.keepaspect(x, y)
gl.stepunit(8, 6)
if width:
gl.prefsize(width, width*3/4)
win = gl.winopen(filename)
if width:
gl.maxsize(x, y)
gl.keepaspect(x, y)
gl.stepunit(8, 6)
gl.winconstraints()
x, y = gl.getsize()
print x, 'x', y
v.SetSize(x, y)
if drop:
param = [SV.FIELDDROP, 1, SV.GENLOCK, SV.GENLOCK_OFF]
else:
param = [SV.FIELDDROP, 0, SV.GENLOCK, SV.GENLOCK_ON]
if mono or grey:
param = param+[SV.COLOR, SV.MONO, SV.INPUT_BYPASS, 1]
else:
param = param+[SV.COLOR, SV.DEFAULT_COLOR, SV.INPUT_BYPASS, 0]
v.SetParam(param)
v.BindGLWindow(win, SV.IN_REPLACE)
gl.qdevice(DEVICE.LEFTMOUSE)
gl.qdevice(DEVICE.WINQUIT)
gl.qdevice(DEVICE.WINSHUT)
gl.qdevice(DEVICE.ESCKEY)
print 'Press left mouse to start recording'
while 1:
dev, val = gl.qread()
if dev == DEVICE.LEFTMOUSE:
if val == 1:
info = format, x, y, number, rate
record(v, info, filename, mono, grey, \
greybits, monotreshold, fields)
elif dev == DEVICE.REDRAW:
# Window resize (or move)
x, y = gl.getsize()
print x, 'x', y
v.SetSize(x, y)
v.BindGLWindow(win, SV.IN_REPLACE)
elif dev in (DEVICE.ESCKEY, DEVICE.WINQUIT, DEVICE.WINSHUT):
# Quit
v.CloseVideo()
gl.winclose(win)
break
# Record until the mouse is released (or any other GL event)
# XXX audio not yet supported
def record(v, info, filename, mono, grey, greybits, monotreshold, fields):
import thread
format, x, y, number, rate = info
fps = 59.64 # Fields per second
# XXX (Strange: need fps of Indigo monitor, not of PAL or NTSC!)
tpf = 1000.0 / fps # Time per field in msec
#
# Go grab
#
gl.wintitle('(rec) ' + filename)
try:
ninfo, data, bitvec = v.CaptureBurst(info)
except sv.error, arg:
print 'CaptureBurst failed:', arg
print 'info:', info
gl.wintitle(filename)
return
gl.wintitle('(save) '+ filename)
#
# Check results
#
if info <> ninfo:
print 'Sorry, format changed.'
print 'Wanted:',info
print 'Got :',ninfo
gl.wintitle(filename)
return
# print bitvec
if x*y*number <> len(data):
print 'Funny data length: wanted',x,'*',y,'*', number,'=',\
x*y*number,'got',len(data)
gl.wintitle(filename)
return
#
# Save
#
if filename:
#
# Construct header and write it
#
vout = VFile.VoutFile().init(filename)
if mono:
vout.format = 'mono'
elif grey and greybits == 8:
vout.format = 'grey'
elif grey:
vout.format = 'grey'+`abs(greybits)`
else:
vout.format = 'rgb8'
vout.width = x
vout.height = y
if fields:
vout.packfactor = (1,-2)
else:
print 'Sorry, can only save fields at the moment'
gl.wintitle(filename)
return
vout.writeheader()
#
# Compute convertor, if needed
#
convertor = None
if grey:
if greybits == 2:
convertor = imageop.grey2grey2
elif greybits == 4:
convertor = imageop.grey2grey4
elif greybits == -2:
convertor = imageop.dither2grey2
fieldsize = x*y/2
nskipped = 0
realframeno = 0
tpf = 1000 / 50.0 #XXXX
for frameno in range(0, number*2):
if frameno <> 0 and \
bitvec[frameno] == bitvec[frameno-1]:
nskipped = nskipped + 1
continue
#
# Save field.
# XXXX Works only for fields and top-to-bottom
#
start = frameno*fieldsize
field = data[start:start+fieldsize]
if convertor:
field = convertor(field, x, y)
elif mono and monotreshold >= 0:
field = imageop.grey2mono(field, x, y, \
1, monotreshold)
elif mono:
field = imageop.dither2mono(field, x, y)
vout.writeframe(int(realframeno*tpf), field, None)
print 'Skipped',nskipped,'duplicate frames'
vout.close()
gl.wintitle('(done) ' + filename)
# Don't forget to call the main program
try:
main()
except KeyboardInterrupt:
print '[Interrupt]'