[MPlayer-users] perfect playback from dvd, jerky from mpg4?

[Andres Meyer]

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> maybe -ofps 23.976 (at encoding) help?
> (mplayer autodetects it after a few seconds but mencoder can't)

why is that? Whatever. I now just look for TELECINE messages in stdout of 
mplayer...

> btw you don't need to mess w/ loopdev, -dvd-device something.iso is just 
> fine

makes things easier... cool.

thx, that was a fast response. I will see the result tomorrow morning...

Andres

PS: small adjustments

#!/usr/bin/python
#
# mencoder dvd backup script
#
# Andres Meyer, 2003

import os
import re
import sys
import getopt

usage = "enc.py {{-i | --iso} movie.iso | {-d | --dvd} /dev/dvd} [{-o | 
- --output} movie.avi] [{-l | --language} en] [-p | --pretend] [-t | 
- --telecine]\n"

try:
	opts, tmp = getopt.getopt(sys.argv[1:], "i:o:l:d:pt", ["iso=", "output=", 
"language=","dvd=", "pretend", "telecine"])
except getopt.GetoptError:
    	print usage
	sys.exit(2)


source = None
target = None
lang = "en,de,fr"
pretend = None
telecine = None

for o, a in opts:
	if o in ("-i", "--iso"):
		if target == None:
			path, ext = os.path.splitext( a)
			target = "%s.avi" % path
			
		source = a
	if o in ("-d", "--dvd"):
		source = a
	if o in ("-o", "--output"):
		target = a
	if o in ("-l", "--lang"):
		lang = a
	if o in ("-p", "--pretend"):
		pretend = 1
	if o in ("-t", "--telecine"):
		telecine = 1

if source == None:
    	print usage
	sys.exit(2)	

print "source: %s, target: %s, lang: %s\n" % (source, target, lang)


cx = 10000
cy = 10000
cw = 0
ch = 0

trackNum = 1

cropNum = None
dvdInfo = ""
while cropNum == None:
	for minute in range( 20, 30):
		cmd = "mplayer -vo null -dvd %s -dvd-device \"%s\" -vop cropdetect -ss 
00:%s:00 -frames 12" % (trackNum, source, minute)
		print "cmd :%s" % cmd
		dvdInfo = os.popen( cmd).read()
		cropNum = re.compile( r".*\(-vop crop=(.*):(.*):(.*):(.*)\).*").search( 
dvdInfo)

		print "*************************************************\n"
		print dvdInfo

		if cropNum == None:
			trackNum = trackNum + 1
			if trackNum > 9:
				sys.exit("************ error  *************\n")
			break

		x = int( cropNum.group(3))
		y = int( cropNum.group(4))
		w = int( cropNum.group(1))
		h = int( cropNum.group(2))

		cx = min( cx, x)
		cy = min( cy, y)
		cw = max( cw, w)
		ch = max( ch, h)

		if re.compile( r".*3:2 TELECINE.*").search( dvdInfo) != None:
			telecine = 1
			

print "**********"
print "Crop=(%s:%s:%s:%s)" % (cw, ch, cx, cy)

resMatch = re.compile( r".*Movie-Aspect is (.*):1.*").search( dvdInfo)
aspect = float( resMatch.group(1))
print "Aspect=%s" % aspect

resMatch = re.compile( r".*VIDEO:  MPEG2  (.*)x(.*)  \(aspect.*\) (.*) fps 
.*").search( dvdInfo)
resX = int( resMatch.group(1))
resY = int( resMatch.group(2))
fps = float( resMatch.group(3))

print "fps from dvd = %s\n" % fps

if telecine != None:
	print "fps override = 23.976\n"
	ofps = "-ofps 23.976"
else:
	ofps = " "


newAspect = (float(cw) / float(resX))/(float(ch) / float(resY)) * aspect

cmd = "nice -18 mencoder -dvd %s -dvd-device \"%s\" %s -ovc lavc -vop 
crop=%s:%s:%s:%s -alang %s -oac copy -lavcopts 
vcodec=mpeg4:aspect=%s:vhq:v4mv:vbitrate=2000" % (trackNum, source, ofps, cw, 
ch, cx, cy, lang, newAspect)

cmd1 = "%s:vpass=1 -o /dev/null" % cmd
cmd2 = "%s:vpass=2 -o \"%s\"" % (cmd, target)


print
print
print "%s; %s" % (cmd1, cmd2)

if pretend == None:
	os.popen( cmd1).read()
	os.popen( cmd2).read()
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