merge changes to encoding setup from pandora

This commit is contained in:
j 2012-12-16 23:24:26 +01:00
parent fc72c48908
commit 5557ac5e15

View file

@ -64,6 +64,16 @@ def frame(video, target, position):
r = run_command(cmd)
return r == 0
def supported_formats():
p = subprocess.Popen([command('ffmpeg'), '-codecs'],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
return {
#'ogg': 'libtheora' in stdout and 'libvorbis' in stdout,
'webm': 'libvpx' in stdout and 'libvorbis' in stdout,
'mp4': 'libx264' in stdout and 'libvo_aacenc' in stdout,
}
def video_cmd(video, target, profile, info):
if not os.path.exists(target):
@ -169,6 +179,47 @@ def video_cmd(video, target, profile, info):
'-lag-in-frames', '16',
'-auto-alt-ref', '1',
]
if format == 'mp4':
#quicktime does not support bpyramid
'''
video_settings += [
'-vcodec', 'libx264',
'-flags', '+loop+mv4',
'-cmp', '256',
'-partitions', '+parti4x4+parti8x8+partp4x4+partp8x8+partb8x8',
'-me_method', 'hex',
'-subq', '7',
'-trellis', '1',
'-refs', '5',
'-bf', '3',
'-flags2', '+bpyramid+wpred+mixed_refs+dct8x8',
'-coder', '1',
'-me_range', '16',
'-keyint_min', '25', #FIXME: should this be related to fps?
'-sc_threshold','40',
'-i_qfactor', '0.71',
'-qmin', '10', '-qmax', '51',
'-qdiff', '4'
]
'''
video_settings += [
'-vcodec', 'libx264',
'-flags', '+loop+mv4',
'-cmp', '256',
'-partitions', '+parti4x4+parti8x8+partp4x4+partp8x8+partb8x8',
'-me_method', 'hex',
'-subq', '7',
'-trellis', '1',
'-refs', '5',
'-bf', '0',
'-flags2', '+mixed_refs',
'-coder', '0',
'-me_range', '16',
'-sc_threshold', '40',
'-i_qfactor', '0.71',
'-qmin', '10', '-qmax', '51',
'-qdiff', '4'
]
video_settings += ['-map', '0:%s,0:0'%info['video'][0]['id']]
else:
video_settings = ['-vn']
@ -185,31 +236,41 @@ def video_cmd(video, target, profile, info):
audio_settings += ['-ac', str(ac)]
if audiobitrate:
audio_settings += ['-ab', audiobitrate]
if format == 'mp4':
audio_settings += ['-acodec', 'libvo_aacenc']
else:
audio_settings += ['-acodec', 'libvorbis']
else:
audio_settings = ['-an']
cmd = [command('ffmpeg'), '-y', '-i', video, '-threads', '4'] \
+ audio_settings \
+ video_settings \
+ ['-f','webm', target]
+ video_settings
if format == 'webm':
cmd += ['-f', 'webm', target]
elif format == 'mp4':
#mp4 needs postprocessing(qt-faststart), write to temp file
cmd += ["%s.mp4" % target]
else:
cmd += [target]
return cmd
def video(video, target, profile, info):
profile, format = profile.split('.')
cmd = video_cmd(video, target, profile, info)
#r = run_command(cmd, -1)
p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
'''
p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
line = p.stderr.readline()
while line:
if line.startswith('frame='):
frames = line.split('=')[1].strip().split(' ')[0]
line = p.stderr.readline()
'''
try:
p.wait()
r = p.returncode
if format == 'mp4':
cmd = [command('qt-faststart'), "%s.mp4" % target, target]
p = subprocess.Popen(cmd, stdin=subprocess.PIPE,
stdout=open('/dev/null', 'w'),
stderr=subprocess.STDOUT)
p.communicate()
os.unlink("%s.mp4" % target)
print 'Input:\t', video
print 'Output:\t', target
except KeyboardInterrupt:
@ -218,5 +279,7 @@ def video(video, target, profile, info):
print "\n\ncleanup unfinished encoding:\nremoving", target
print "\n"
os.unlink(target)
if format == 'mp4' and os.path.exists("%s.mp4" % target):
os.unlink("%s.mp4" % target)
sys.exit(1)
return r == 0