seiichiro/n900-encode
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Version 1.2

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Added possibility for CRF-Encoding
Default Quality is now CRF at factor 22
Some Encoding Tweaks and default values for the Nokia N9
This commit is contained in:
seiichiro 2012-03-23 20:25:16 +01:00
parent 6bb819a6a0
commit 86eacfa9b5
1 changed files with 23 additions and 19 deletions
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n900-encode.py
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@ -4,7 +4,7 @@
# n900-encode.py: Encode almost any Video to an Nokia N900-compatible format (h264,aac,mp4) # 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! # Disclaimer: This program is provided without any warranty, USE AT YOUR OWN RISK!
# #
# Version 1.1 (22.02.2012) # Version 1.2 (23.03.2012)
# #
# (C) 2010-2012 Stefan Brand <seiichiro@seiichiro0185.org> # (C) 2010-2012 Stefan Brand <seiichiro@seiichiro0185.org>
# #
@ -21,12 +21,12 @@ from time import sleep
# Default values, feel free to adjust # Default values, feel free to adjust
########################################################################################### ###########################################################################################
_basewidth = 800 # Base width for widescreen Video _basewidth = 854 # Base width for widescreen Video
_basewidth43 = 640 # Base width for 4:3 Video _basewidth43 = 640 # Base width for 4:3 Video
_maxheight = 480 # maximum height allowed _maxheight = 480 # maximum height allowed
_abitrate = 96 # Audio Bitrate in kBit/s _abitrate = 112 # Audio Bitrate in kBit/s
_vbitrate = 500 # Video Bitrate in kBit/s _vbitrate = 22 # Video Bitrate in kBit/s, Values < 52 are used as a CRF-Factor
_threads = 2 # Use n Threads to encode _threads = "auto" # Use n Threads to encode
_mpbin = None # mplayer binary, if set to None it is searched in your $PATH _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 _ffbin = None # ffmpeg binary, if set to None it is searched in your $PATH
@ -56,7 +56,7 @@ def main(argv):
output = "n900encode.mp4" output = "n900encode.mp4"
mpopts = "" mpopts = ""
abitrate = _abitrate * 1000 abitrate = _abitrate * 1000
vbitrate = _vbitrate * 1000 vbitrate = int(_vbitrate)
threads = _threads threads = _threads
overwrite = False overwrite = False
for opt, arg in opts: for opt, arg in opts:
@ -69,7 +69,7 @@ def main(argv):
elif opt in ("-a", "--abitrate"): elif opt in ("-a", "--abitrate"):
abitrate = int(arg) * 1000 abitrate = int(arg) * 1000
elif opt in ("-v", "--vbitrate"): elif opt in ("-v", "--vbitrate"):
vbitrate = int(arg) * 1000 vbitrate = int(arg)
elif opt in ("-t", "--threads"): elif opt in ("-t", "--threads"):
threads = arg threads = arg
elif opt in ("-f", "--force-overwrite"): elif opt in ("-f", "--force-overwrite"):
@ -165,7 +165,7 @@ def convert(input, output, res, abitrate, vbitrate, threads, mpopts):
# Define mplayer command for video decoding # Define mplayer command for video decoding
mpvideodec = [ mpbin, mpvideodec = [ mpbin,
"-sws", "9", "-sws", "9",
"-vf", "scale=" + str(res[0]) + ":" + str(res[1]) + ",unsharp=c4x4:0.3:l5x5:0.5", "-vf", "scale=" + str(res[0]) + ":" + str(res[1]) + ",dsize=" + str(res[0]) + ":" + str(res[1]) + ",unsharp=c4x4:0.3:l5x5:0.5", "-ass",
"-vo", "yuv4mpeg:file=" + vfifo, "-vo", "yuv4mpeg:file=" + vfifo,
"-ao", "null", "-ao", "null",
"-nosound", "-nosound",
@ -193,6 +193,14 @@ def convert(input, output, res, abitrate, vbitrate, threads, mpopts):
# Define ffmpeg command for a/v encoding # Define ffmpeg command for a/v encoding
if (vbitrate > 51):
rmode = "-b:v"
vbitr = str(vbitrate*1000)
else:
rmode = "-crf"
vbitr = str(vbitrate)
ffmenc = [ ffbin, ffmenc = [ ffbin,
"-f", "yuv4mpegpipe", "-f", "yuv4mpegpipe",
"-i", vfifo, "-i", vfifo,
@ -206,17 +214,13 @@ def convert(input, output, res, abitrate, vbitrate, threads, mpopts):
"-threads", str(threads), "-threads", str(threads),
"-vprofile", "baseline", "-vprofile", "baseline",
"-tune", "animation", "-tune", "animation",
"-b:v", str(vbitrate), rmode, vbitr,
"-flags", "+loop", "-cmp", "+chroma", "-flags", "+loop", "-cmp", "+chroma", "-coder", "0",
"-partitions", "+parti4x4+partp8x8+partb8x8", "-partitions", "+parti4x4+partp8x8+partb8x8",
"-subq", "5", "-trellis", "1", "-refs", "1", "-subq", "7", "-trellis", "1", "-refs", "3",
"-coder", "0", "-me_range", "16", "-me_range", "16", "-me_method", "hex",
"-g", "300", "-keyint_min", "25", "-bufsize", "10M", "-maxrate", "1000000",
"-sc_threshold", "40", "-i_qfactor", "0.71", "-x264opts", "level=3.1", "-f", "mp4",
"-bt", "640", "-bufsize", "10M", "-maxrate", "1000000",
"-rc_eq", "'blurCplx^(1-qComp)'",
"-qcomp", "0.62", "-qmin", "10", "-qmax", "51",
"-x264opts", "level=3.0", "-f", "mp4",
output ] output ]
# Start mplayer decoding processes in background # Start mplayer decoding processes in background
@ -273,7 +277,7 @@ def usage():
print(" --output <file> [-o]: Name of the converted Video") print(" --output <file> [-o]: Name of the converted Video")
print(" --mpopts \"<opts>\" [-m]: Additional options for mplayer (eg -sid 1 or -aid 1) Must be enclosed in \"\"") print(" --mpopts \"<opts>\" [-m]: Additional options for mplayer (eg -sid 1 or -aid 1) Must be enclosed in \"\"")
print(" --abitrate <br> [-a]: Audio Bitrate in KBit/s") print(" --abitrate <br> [-a]: Audio Bitrate in KBit/s")
print(" --vbitrate <br> [-v]: Video Bitrate in kBit/s") print(" --vbitrate <br> [-v]: Video Bitrate in kBit/s, values less than 52 will be used as CRF-Factor")
print(" --threads <num> [-t]: Use <num> Threads to encode") print(" --threads <num> [-t]: Use <num> Threads to encode")
print(" --force-overwrite [-f]: Overwrite output-file if existing") print(" --force-overwrite [-f]: Overwrite output-file if existing")
print(" --help [-h]: Print this Help") print(" --help [-h]: Print this Help")