add optoin to use melt(MLT) to extract frames from H264

This commit is contained in:
j 2014-09-25 15:28:08 +02:00
parent 1efd49e19a
commit ada3bbe346
5 changed files with 44 additions and 13 deletions

2
README
View file

@ -29,7 +29,7 @@ To run pan.do/ra you need to install and setup:
python-geoip python-html5lib python-lxml \
python-gst0.10 gstreamer0.10-plugins-good gstreamer0.10-plugins-bad \
postgresql postgresql-contrib rabbitmq-server \
ffmpeg2theora libav-tools libavcodec-extra-53 \
ffmpeg2theora libav-tools libavcodec-extra-53 melt \
python-ox oxframe imagemagick poppler-utils mkvtoolnix gpac

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@ -325,7 +325,7 @@ def run_command(cmd, timeout=10):
return p.returncode
def frame(video, frame, position, height=128, redo=False):
def frame(video, frame, position, height=128, redo=False, info=None):
'''
params:
video input
@ -339,21 +339,50 @@ def frame(video, frame, position, height=128, redo=False):
if redo or not exists(frame):
ox.makedirs(folder)
if video.endswith('.mp4'):
cmd = [
AVCONV, '-y',
'-ss', str(position),
'-i', video,
'-an', '-vframes', '1',
'-vf', 'scale=-1:%s' % height
]
if not frame.endswith('.png'):
cmd += ['-f', 'mjpeg']
cmd += [frame]
if settings.USE_MELT:
cmd = melt_frame_cmd(video, frame, position, height, info)
else:
cmd = melt_frame_cmd(video, frame, position, height)
else:
cmd = ['oxframe', '-i', video, '-o', frame,
'-p', str(position), '-y', str(height)]
run_command(cmd)
def avconv_frame_cmd(video, frame, position, height=128):
cmd = [
AVCONV, '-y',
'-ss', str(position),
'-i', video,
'-an', '-vframes', '1',
'-vf', 'scale=-1:%s' % height
]
if not frame.endswith('.png'):
cmd += ['-f', 'mjpeg']
cmd += [frame]
return cmd
def melt_frame_cmd(video, frame, position, height=128, info=None):
if not info:
info = ox.avinfo(video)
fps = float(AspectRatio(info['video'][0]['framerate']))
format = frame.split('.')[-1]
vcodec = 'mjpeg' if format == 'jpg' else 'png'
cmd = [
'melt',
'-silent',
video,
'in=%d' % position, 'out=%d' % position,
'-consumer' 'avformat:%s' % frame,
'vcodec=%s' % vcodec
]
if height:
dar = AspectRatio(info['video'][0]['display_aspect_ratio'])
width = int(dar * height)
width += width % 2
position = int(position * fps)
cmd += ['-s', '%sx%s' % (width, height)]
return cmd
def frame_direct(video, target, position):
fdir = os.path.dirname(target)
if fdir and not os.path.exists(fdir):

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@ -1084,7 +1084,7 @@ class Item(models.Model):
path = os.path.join(settings.MEDIA_ROOT, stream.path(),
'frames', "%dp"%height, "%s.jpg"%position)
if not os.path.exists(path) and stream.media:
extract.frame(stream.media.path, path, position, height)
extract.frame(stream.media.path, path, position, height, info=stream.info)
if not os.path.exists(path):
return None
return path

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@ -152,6 +152,7 @@ LOGGING = {
AUTH_PROFILE_MODULE = 'user.UserProfile'
AUTH_CHECK_USERNAME = True
AVCONV_VERSION = 0
USE_MELT=False
#=========================================================================
#Pan.do/ra related settings settings

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@ -52,6 +52,7 @@ apt-get install -y \
$LIBAVCODEC_EXTRA \
libav-tools \
ffmpeg2theora \
melt \
mkvtoolnix \
gpac \
imagemagick \