From 05c477fef5f06cc6d4a8b44ea33bbfe20082906b Mon Sep 17 00:00:00 2001
From: Stefan Brand <seiichiro0185@tol.ch>
Date: Fri, 12 Feb 2010 11:23:29 +0100
Subject: [PATCH] Initial commit

---
 n900-encode.py | 114 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100755 n900-encode.py

diff --git a/n900-encode.py b/n900-encode.py
new file mode 100755
index 0000000..f44f57f
--- /dev/null
+++ b/n900-encode.py
@@ -0,0 +1,114 @@
+#!/usr/bin/env python
+
+import sys, os, getopt, subprocess, re
+
+_basewidth = 800
+_basewidth43 = 640
+_maxheight = 480
+_abitrate = 96
+_vbitrate = 500
+_threads = 2
+
+def main(argv):
+	"""Main Function, cli argument processing and checking"""
+	try:
+		opts, args = getopt.getopt(argv, "i:o:m:v:a:t:h", ["input=", "output=", "mpopts=", "abitrate=", "vbitrate=", "threads=", "help"])
+	except getopt.GetoptError, err:
+		print str(err)
+		usage()
+		sys.exit(1)
+	input = None
+	output = "n900encode,mp4"
+	mpopts = ""
+	abitrate = _abitrate * 1000
+	vbitrate = _vbitrate * 1000
+	threads = _threads
+	for opt, arg in opts:
+		if opt in ("-i", "--input"):
+			input = arg
+		elif opt in ("-o" "--output"):
+			output = arg
+		elif opt in ("-m" "--mpopts"):
+			mpopts = arg
+		elif opt in ("-a", "--abitrate"):
+			abitrate = arg * 1000
+		elif opt in ("-v", "--vbitrate"):
+			vbitrate = arg * 1000
+		elif opt in ("-t", "--threads"):
+			threads = arg
+		elif opt in ("-h", "--help"):
+			usage()
+			sys.exit(0)
+
+	if not os.path.isfile(input):
+		print "Error: input file is not a valid File or doesn't exist"
+		sys.exit(2)
+	
+	res = calculate(input)
+	convert(input, output, res, abitrate, vbitrate, threads, mpopts)
+
+
+def calculate(input):
+	cmd="mplayer -ao null -vo null -frames 0 -identify \"" + input + "\""
+	mp = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
+	
+	s = re.compile("^ID_VIDEO_ASPECT=(.*)$", re.M)
+	m = s.search(mp[0])
+	orig_aspect = m.group(1)
+	s = re.compile("^ID_VIDEO_WIDTH=(.*)$", re.M)
+	m = s.search(mp[0])
+	orig_width = m.group(1)
+	s = re.compile("^ID_VIDEO_HEIGHT=(.*)$", re.M)
+	m = s.search(mp[0])
+	orig_height = m.group(1)
+
+	width = _basewidth
+	height = int(round(_basewidth / float(orig_aspect) / 16) * 16)
+	if (height > _maxheight):
+		width = _basewidth43
+		height = int(round(_basewidth43 / float(orig_aspect) / 16) * 16)
+
+	return (width, height)
+
+
+def convert(input, output, res, abitrate, vbitrate, threads, mpopts):
+	"""Convert the Video"""
+
+	pid = os.getpid()
+	afifo = "/tmp/stream" + str(pid) + ".wav"
+	vfifo = "/tmp/stream" + str(pid) + ".yuv"
+	os.mkfifo(afifo)
+	os.mkfifo(vfifo)
+
+	mpvideodec = "mplayer -sws 9 -vf scale=" + str(res[0]) + ":" + str(res[1]) + ",unsharp=c4x4:0.3:l5x5:0.5 -vo yuv4mpeg:file=" + vfifo +" -ao null -nosound -noframedrop -benchmark -quiet -msglevel all=-1 " + mpopts + "\"" + input + "\" &"
+
+	mpaudiodec = "mplayer -ao pcm:file=" + afifo + " -vo null -vc null -noframedrop -quiet -msglevel all=-1 2>/dev/null " + mpopts + "\"" + input + "\" &"
+
+	ffmenc = "ffmpeg -f yuv4mpegpipe -i " + vfifo + " -i " + afifo + " -acodec libfaac -ac 2 -ab " + str(abitrate) + " -ar 22500 -vcodec libx264 -threads " + str(threads) + " -b " + str(vbitrate) + " -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -subq 5 -trellis 1 -refs 1 -coder 0 -me_range 16 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 640 -bufsize 10M -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -level 30 -f mp4 \"" + output + "\""
+
+	subprocess.Popen(mpvideodec, shell=True, stdout=None, stderr=None)
+	subprocess.Popen(mpaudiodec, shell=True, stdout=None, stderr=None)
+	subprocess.call(ffmenc, shell=True)
+
+	os.remove(afifo)
+	os.remove(vfifo)
+
+
+
+def usage():
+	"""Print avaiable commandline arguments"""
+
+	print "This is n900-encode.py (C) 2010 Stefan Brand <seiichiro0185 AT tol.ch>"
+	print "n900-encode.py usage:\n"
+	print "--input <file>    [-i]: Video to Convert"
+	print "--output <file>   [-o]: Name of the converted Video"
+	print "--mpopts \"<opts>\" [-m]: Additional options for mplayer (eg -sid 1 or -aid 1)"
+	print "--abitrate <br>   [-a]: Audio Bitrate in KBit/s"
+	print "--vbitrate <br>   [-v]: Video Bitrate in kBit/s"
+	print "--threads <num>   [-t]: Use <num> Threads to encode"
+	print "--help            [-h]: Print this Help"
+
+
+# Start the Main Function
+if __name__ == "__main__":
+    main(sys.argv[1:])