Code beautifying, Comments
This commit is contained in:
Stefan Brand
parent
05c477fef5
commit
d0df6975ed
183
n900-encode.py
183
n900-encode.py
|
|
@ -1,28 +1,48 @@
|
|||
#!/usr/bin/env python
|
||||
|
||||
###########################################################################################
|
||||
# n900-encode.py: Encode almost any Video to an Nokia N900-compatible format (h264,aac,mp4)
|
||||
# Disclaimer: This program is provided without any warranty, USE AT YOUR OWN RISK!
|
||||
#
|
||||
# (C) 2010 Stefan Brand <seiichiro0185 AT tol DOT ch>
|
||||
###########################################################################################
|
||||
|
||||
import sys, os, getopt, subprocess, re
|
||||
|
||||
_basewidth = 800
|
||||
_basewidth43 = 640
|
||||
_maxheight = 480
|
||||
_abitrate = 96
|
||||
_vbitrate = 500
|
||||
_threads = 2
|
||||
###########################################################################################
|
||||
# Default values, feel free to adjust
|
||||
###########################################################################################
|
||||
|
||||
_basewidth = 800 # Base width for widescreen Video
|
||||
_basewidth43 = 640 # Base width for 4:3 Video
|
||||
_maxheight = 480 # maximum height allowed
|
||||
_abitrate = 96 # Audio Bitrate in kBit/s
|
||||
_vbitrate = 500 # Video Bitrate in kBit/s
|
||||
_threads = 2 # Use n Threads to encode
|
||||
_mpbin = None # mplayer binary, if set to None it is searched in your $PATH
|
||||
_ffbin = None # ffmpeg binary, if set to None it is searched in your $PATH
|
||||
|
||||
###########################################################################################
|
||||
# Main Program, no changes needed bekow this line
|
||||
###########################################################################################
|
||||
|
||||
def main(argv):
|
||||
"""Main Function, cli argument processing and checking"""
|
||||
|
||||
# CLI Argument Processing
|
||||
try:
|
||||
opts, args = getopt.getopt(argv, "i:o:m:v:a:t:h", ["input=", "output=", "mpopts=", "abitrate=", "vbitrate=", "threads=", "help"])
|
||||
opts, args = getopt.getopt(argv, "i:o:m:v:a:t:hf", ["input=", "output=", "mpopts=", "abitrate=", "vbitrate=", "threads=", "help", "force-overwrite"])
|
||||
except getopt.GetoptError, err:
|
||||
print str(err)
|
||||
usage()
|
||||
sys.exit(1)
|
||||
|
||||
input = None
|
||||
output = "n900encode,mp4"
|
||||
output = "n900encode.mp4"
|
||||
mpopts = ""
|
||||
abitrate = _abitrate * 1000
|
||||
vbitrate = _vbitrate * 1000
|
||||
threads = _threads
|
||||
overwrite = False
|
||||
for opt, arg in opts:
|
||||
if opt in ("-i", "--input"):
|
||||
input = arg
|
||||
|
|
@ -36,32 +56,73 @@ def main(argv):
|
|||
vbitrate = arg * 1000
|
||||
elif opt in ("-t", "--threads"):
|
||||
threads = arg
|
||||
elif opt in ("-f", "--force-overwrite"):
|
||||
overwrite = True
|
||||
elif opt in ("-h", "--help"):
|
||||
usage()
|
||||
sys.exit(0)
|
||||
|
||||
# Check for needed Programs
|
||||
global mpbin
|
||||
mpbin = None
|
||||
if _mpbin == None:
|
||||
mpbin = progpath("mplayer")
|
||||
else:
|
||||
if os.path.exists(_mpbin) and not os.path.isdir(_mpbin):
|
||||
mpbin = _mpbin
|
||||
if mpbin == None:
|
||||
print "Error: mplayer not found in PATH binary given, Aborting!"
|
||||
sys.exit(1)
|
||||
|
||||
global ffbin
|
||||
ffbin = None
|
||||
if _ffbin == None:
|
||||
ffbin = progpath("ffmpeg")
|
||||
else:
|
||||
if os.path.exists(_ffbin) and not os.path.isdir(_ffbin):
|
||||
ffbin = _ffbin
|
||||
if ffbin == None:
|
||||
print "Error: ffmpeg not found in PATH and no binary given, Aborting!"
|
||||
sys.exit(1)
|
||||
|
||||
# Check input and output files
|
||||
if not os.path.isfile(input):
|
||||
print "Error: input file is not a valid File or doesn't exist"
|
||||
sys.exit(2)
|
||||
|
||||
if os.path.isfile(output):
|
||||
if overwrite:
|
||||
os.remove(output)
|
||||
else:
|
||||
print "Error: output file already exists, force overwrite with -f"
|
||||
sys.exit(1)
|
||||
|
||||
# Start Processing
|
||||
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)
|
||||
"""Get Characteristics from input video and calculate resolution for output"""
|
||||
|
||||
# Get characteristics using mplayer
|
||||
cmd=[mpbin, "-ao", "null", "-vo", "null", "-frames", "0", "-identify", input]
|
||||
mp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
|
||||
|
||||
try:
|
||||
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)
|
||||
except:
|
||||
print "Error: unable to identify source video, exiting!"
|
||||
sys.exit(2)
|
||||
|
||||
# Calculate output resolution
|
||||
width = _basewidth
|
||||
height = int(round(_basewidth / float(orig_aspect) / 16) * 16)
|
||||
if (height > _maxheight):
|
||||
|
|
@ -74,26 +135,90 @@ def calculate(input):
|
|||
def convert(input, output, res, abitrate, vbitrate, threads, mpopts):
|
||||
"""Convert the Video"""
|
||||
|
||||
# Create FIFOs for passing audio/video from mplayer to ffmpeg
|
||||
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 + "\" &"
|
||||
# Define mplayer command for video decoding
|
||||
mpvideodec = [ mpbin,
|
||||
"-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 + "\" &"
|
||||
# Define mplayer command for audio decoding
|
||||
mpaudiodec = [ mpbin,
|
||||
"-ao", "pcm:file=" + afifo,
|
||||
"-vo", "null",
|
||||
"-vc", "null",
|
||||
"-noframedrop",
|
||||
"-quiet",
|
||||
"-msglevel", "all=-1",
|
||||
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 + "\""
|
||||
# Define ffmpeg command for a/v encoding
|
||||
ffmenc = [ ffbin,
|
||||
"-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", "0.62", "-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)
|
||||
# Start mplayer decoding processes in background
|
||||
try:
|
||||
subprocess.Popen(mpvideodec, stdout=None, stderr=None)
|
||||
subprocess.Popen(mpaudiodec, stdout=None, stderr=None)
|
||||
except:
|
||||
print "Error: Starting decoding threads failed!"
|
||||
sys.exit(3)
|
||||
|
||||
# Start ffmpeg encoding process in foreground
|
||||
try:
|
||||
subprocess.check_call(ffmenc)
|
||||
except CalledProcessError:
|
||||
print "Error: Encoding thread failed!"
|
||||
sys.exit(4)
|
||||
|
||||
# Remove FIFOs after encoding
|
||||
os.remove(afifo)
|
||||
os.remove(vfifo)
|
||||
|
||||
|
||||
def progpath(program):
|
||||
"""Get Full path for given Program"""
|
||||
|
||||
for path in os.environ.get('PATH', '').split(':'):
|
||||
if os.path.exists(os.path.join(path, program)) and not os.path.isdir(os.path.join(path, program)):
|
||||
return os.path.join(path, program)
|
||||
return None
|
||||
|
||||
|
||||
def usage():
|
||||
"""Print avaiable commandline arguments"""
|
||||
|
|
@ -106,7 +231,9 @@ def usage():
|
|||
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 "--force-iverwrite [-f]: Overwrite Output-File if existing"
|
||||
print "--help [-h]: Print this Help"
|
||||
sys.exit(0)
|
||||
|
||||
|
||||
# Start the Main Function
|
||||
|
|
|
|||
Loading…
Reference in a new issue