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#!/usr/bin/env python |
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# $Id$ |
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""" |
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Make an mpeg movie from the pnm files in the specified directory |
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""" |
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import os, sys, re |
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import getopt |
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|
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(opts, args) = getopt.getopt(sys.argv[1:], |
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"s:d:o:f:p:h", |
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["framestem=", "dirname=", "output=", "format=", "pad=", "help"], |
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) |
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|
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def usage(): |
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print "Usage:" |
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print " make_movie -s <framestem> -o <output filename> -f <format> -p <pad>\n" |
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print " Arguments:" |
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print " -s/--framestem: The frame filename stem (the stuff before .pnm) (required)" |
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print " -d/--dirname: The directory of frames (optional)" |
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print " -o/--output: Output mpeg filename (optional)" |
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print " -f/--format: Input frame image format (optional)" |
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print " -p/--pad: How many frames to pad the movie (optional)" |
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|
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dirname = "./" |
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mpegName = None |
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fnameStem = None |
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format = "pnm" # if format not specified assume pnm |
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pad = 1 |
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|
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for option, arg in opts: |
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if option in ('-s', '--stem'): |
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fnameStem = arg |
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elif option in ('-d', '--dirname'): |
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dirname = arg |
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elif option in ('-o', '--output'): |
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mpegName = arg |
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elif option in ('-f', '--format'): |
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format = arg |
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elif option in ('-p', '--pad'): |
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pad = int(arg) |
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elif option in ('-h', '--help'): |
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usage() |
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sys.exit(0) |
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|
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if fnameStem is None: |
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print "You must supply the stem of the frame filenames\n" |
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usage() |
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sys.exit(0) |
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if mpegName is None: |
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mpegName = fnameStem + ".mpg" |
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|
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# determine the number of files to convert |
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dirList = os.listdir(dirname) |
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r = re.compile( "%s\\d+\\.%s"%(fnameStem,format) ) |
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count = 0 # counter for the number of files found |
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fnames = [] |
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for fname in dirList: |
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if r.match(fname): |
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fnames.append(fname) |
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count += 1 |
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|
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if count == 0: |
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raise ValueError, "No matching files found" |
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|
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# do a conversion if necessary |
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if format != "pnm": |
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print "Converting frames to pnm" |
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r = re.compile("%s\\d+\\." % (fnameStem)) |
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for fname in fnames: |
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# strip off the bit after the last dot |
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front = r.findall(fname) |
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front = front[0] |
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# make the conversion string to pass to 'convert' |
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convString = "convert %s/%s%s %s/%spnm" % \ |
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(dirname, front, format, dirname, front) |
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retVal = os.system(convString) |
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if retVal != 0: |
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raise SystemError, "Conversion of %s%s failed" % (front, format) |
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|
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# use ppmtompeg to convert the pnms to a movie |
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print "Making movie" |
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|
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# now automatically generate the ppmtompeg params file |
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print "Generating params file..." |
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|
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# old pattern |
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# PATTERN IBBBPBBBPBBBPBBBPBBB |
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|
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paramsFileString = """REFERENCE_FRAME DECODED |
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FRAME_RATE 24 |
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OUTPUT %s |
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PATTERN IBBPBBPBB |
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FORCE_ENCODE_LAST_FRAME |
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GOP_SIZE 20 |
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BSEARCH_ALG CROSS2 |
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PSEARCH_ALG TWOLEVEL |
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IQSCALE 10 |
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PQSCALE 11 |
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BQSCALE 16 |
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RANGE 8 |
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SLICES_PER_FRAME 1 |
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BASE_FILE_FORMAT PNM |
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INPUT_DIR . |
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INPUT_CONVERT * |
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INPUT |
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""" % (mpegName) |
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|
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# need to determine the first number and last number of the list of files |
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# sort the files first just in case |
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fnames.sort() |
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firstFile = fnames[0] |
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lastFile = fnames[-1] |
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|
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r = re.compile("([a-zA-Z-_\.\d])(\\d+)(\\.\\w+)$") |
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firstNum = r.findall(firstFile) |
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firstNum = firstNum[0][1] |
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lastNum = r.findall(lastFile) |
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lastNum = lastNum[0][1] |
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|
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|
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# finish off the params file string |
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if pad == 1: |
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paramsFileString += "%s/%s*.pnm [%s-%s]\n" % \ |
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(dirname, fnameStem, firstNum, lastNum) |
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elif pad > 1: |
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# positive padding: add duplicate frames (slow the movie down) |
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for i in range(int(firstNum), int(lastNum)+1): |
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for j in range(pad): |
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paramsFileString += "%s/%s%04d.pnm\n" % (dirname, fnameStem, i) |
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elif pad < 1: |
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# negative padding: i.e. remove frames (speed the movie up) |
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for i in range(int(firstNum), int(lastNum)+1, abs(pad)): |
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paramsFileString += "%s/%s%04d.pnm\n" % (dirname, fnameStem, i) |
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|
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paramsFileString += """END_INPUT |
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PIXEL HALF |
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ASPECT_RATIO 1 |
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""" |
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|
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# write the string to file |
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fp = open( "%s/%s.params" % (dirname,fnameStem,), "w" ) |
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fp.write(paramsFileString + '\n') |
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fp.close() |
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print "Done params file generation" |
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|
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# now do the conversion to mpeg |
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print "Performing conversion to mpeg" |
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convertString = "ppmtompeg %s/%s.params" % (dirname, fnameStem) |
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result = os.system(convertString) |
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if result != 0: |
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print "An error occurred in mpeg conversion" |
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|
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# now clean up a bit |
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#for i in range(count): |
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# rmFname = "%s_%04d.ppm" % (fnameStem,i) |
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# os.unlink(rmFname) |
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|
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print "\nDone!" |
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