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#!/usr/bin/python
# Copyright 2007 Nanorex, Inc. See LICENSE file for details.
import sys, os
WHERE = '/home/wware/tmp/mpeg'
JUST_CHECK_FOR_INPUTS = False
REALLY = False
def do(cmd):
print cmd
if REALLY: os.system(cmd)
for i in range(1, 9):
outdir = os.path.join(WHERE, "seq%d" % i)
do("rm -rf " + outdir)
do("mkdir " + outdir)
# For the moment, don't worry yet about the nsecs/rots stuff,
# that can be added later.
def testExists(f):
inf = open(f) # raises an IOError if it doesn't exist
#r = inf.read()
#assert len(r) > 10000
inf.close()
def average(outdir, srcdir, step, avg, seconds, startSrc=0, startResult=0):
outdir = os.path.join(WHERE, outdir)
for i in range(seconds * 30 + 1):
result = os.path.join(outdir, "frame.%06d.png" % (i + startResult))
if avg == 1:
if JUST_CHECK_FOR_INPUTS:
testExists(os.path.join(WHERE, srcdir,
"wwrot.%06d.png" % (step * i + startSrc)))
else:
do("cp " + os.path.join(WHERE, srcdir,
"wwrot.%06d.png" % (step * i + startSrc)) +
" " + result)
else:
sources = [ ]
for j in range(avg):
idx = step * i + j + startSrc
sources.append(os.path.join(WHERE, srcdir,
"wwrot.%06d.png" % idx))
if JUST_CHECK_FOR_INPUTS:
for f in sources:
testExists(f)
else:
do("convert -average " + " ".join(sources) + " " + result)
def crossFade(outdir, srcdir1, srcdir2, step, avg):
average(outdir, srcdir1, step, avg, 5)
# kill the last frame produced from that sequence
do("rm -f " + os.path.join(WHERE, outdir, "frame.000150.png"))
print "Doing the crossfade"
for index in range(15):
outputFrame = index + 150
result = os.path.join(WHERE, outdir, "frame.%06d.png" % outputFrame)
inputFrameStart = outputFrame * step
if avg == 1:
if JUST_CHECK_FOR_INPUTS:
testExists(os.path.join(WHERE, srcdir1,
"wwrot.%06d.png" % inputFrameStart))
testExists(os.path.join(WHERE, srcdir2,
"wwrot.%06d.png" % inputFrameStart))
else:
# Every cross-fade is a half-second, or 15 frames, so average N frames from srcdir1
# with (15-N) frames from srcdir2
cmd = "convert -average"
inframe1 = os.path.join(WHERE, srcdir1,
"wwrot.%06d.png" % inputFrameStart)
inframe2 = os.path.join(WHERE, srcdir2,
"wwrot.%06d.png" % inputFrameStart)
else:
sources1 = [ ]
for j in range(avg):
idx = inputFrameStart + j
sources1.append(os.path.join(WHERE, srcdir1,
"wwrot.%06d.png" % idx))
sources2 = [ ]
for j in range(avg):
idx = inputFrameStart + j
sources2.append(os.path.join(WHERE, srcdir2,
"wwrot.%06d.png" % idx))
if JUST_CHECK_FOR_INPUTS:
for f in sources1 + sources2:
testExists(f)
else:
do("convert -average " + " ".join(sources1) + " /tmp/blurred1.png")
do("convert -average " + " ".join(sources2) + " /tmp/blurred2.png")
inframe1 = "/tmp/blurred1.png"
inframe2 = "/tmp/blurred2.png"
if not JUST_CHECK_FOR_INPUTS:
sources = ((15 - index) * [inframe1,]) + (index * [inframe2,])
do("convert -average " + " ".join(sources) + " " + result)
# after cross fade, start at frame 5.5*30 = 165
average(outdir, srcdir2, step, avg, 5, 165 * step, 165)
pass
###################################################
# (1) Titles 1 & 2: Medium speed, CPK, 18 seconds
average("seq1", "fast_cpk_png", 4, 4, 18)
# (2) Cross fade: 5 secs medium CPK, half-second fade, 5 secs medium B+S
crossFade("seq2", "fast_cpk_png", "fastpng", 4, 4)
# (3) Title 3: 18 seconds fast B+S (8 secs with title, 10 secs without)
average("seq3", "fastpng", 1, 1, 18)
# (4) Title 4: 18 seconds medium B+S (8 secs with title, 10 secs without)
average("seq4", "fastpng", 4, 4, 18)
# (5) Title 5: 18 seconds fast B+S (8 secs with title, 10 secs without)
average("seq5", "slowpng", 10, 10, 18)
# (6) Titles 6 - 8: 25 seconds, fast jumpy B+S
average("seq6", "slowpng", 10, 1, 25)
# (7) Cross fade: 5 secs slow jumpy B+S, half-second fade, 5 secs slow jumpy CPK
crossFade("seq2", "slowpng", "slow_cpk_png", 10, 1)
# (8) Titles 9 & 10: 27 secs slow CPK (not jumpy)
average("seq8", "slow_cpk_png", 10, 10, 27)
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