191 lines
6.6 KiB
Python
191 lines
6.6 KiB
Python
# -*- coding:utf-8 -*-
|
|
|
|
# Copyright (c) 2013 - Christophe-Marie Duquesne
|
|
# Copyright (c) 2013-2016 - Simon Conseil
|
|
|
|
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
# of this software and associated documentation files (the "Software"), to
|
|
# deal in the Software without restriction, including without limitation the
|
|
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
# sell copies of the Software, and to permit persons to whom the Software is
|
|
# furnished to do so, subject to the following conditions:
|
|
|
|
# The above copyright notice and this permission notice shall be included in
|
|
# all copies or substantial portions of the Software.
|
|
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
# IN THE SOFTWARE.
|
|
|
|
from __future__ import with_statement
|
|
|
|
import logging
|
|
import os
|
|
import re
|
|
import shutil
|
|
from os.path import splitext
|
|
|
|
from . import image, utils
|
|
from .settings import get_thumb, Status
|
|
from .utils import call_subprocess, is_valid_html5_video
|
|
|
|
|
|
class SubprocessException(Exception):
|
|
pass
|
|
|
|
|
|
def check_subprocess(cmd, source, outname):
|
|
"""Run the command to resize the video and remove the output file if the
|
|
processing fails.
|
|
|
|
"""
|
|
logger = logging.getLogger(__name__)
|
|
try:
|
|
returncode, stdout, stderr = call_subprocess(cmd)
|
|
except KeyboardInterrupt:
|
|
logger.debug('Process terminated, removing file %s', outname)
|
|
if os.path.isfile(outname):
|
|
os.remove(outname)
|
|
raise
|
|
|
|
if returncode:
|
|
logger.debug('STDOUT:\n %s', stdout)
|
|
logger.debug('STDERR:\n %s', stderr)
|
|
if os.path.isfile(outname):
|
|
logger.debug('Removing file %s', outname)
|
|
os.remove(outname)
|
|
raise SubprocessException('Failed to process ' + source)
|
|
|
|
|
|
def video_size(source):
|
|
"""Returns the dimensions of the video."""
|
|
|
|
ret, stdout, stderr = call_subprocess(['ffmpeg', '-i', source])
|
|
pattern = re.compile(r'Stream.*Video.* ([0-9]+)x([0-9]+)')
|
|
match = pattern.search(stderr)
|
|
rot_pattern = re.compile(r'rotate\s*:\s*-?(90|270)')
|
|
rot_match = rot_pattern.search(stderr)
|
|
|
|
if match:
|
|
x, y = int(match.groups()[0]), int(match.groups()[1])
|
|
else:
|
|
x = y = 0
|
|
if rot_match:
|
|
x, y = y, x
|
|
return x, y
|
|
|
|
|
|
def generate_video(source, outname, settings, options=None):
|
|
"""Video processor.
|
|
|
|
:param source: path to a video
|
|
:param outname: path to the generated video
|
|
:param settings: settings dict
|
|
:param options: array of options passed to ffmpeg
|
|
|
|
"""
|
|
logger = logging.getLogger(__name__)
|
|
|
|
# Don't transcode if source is in the required format and
|
|
# has fitting datedimensions, copy instead.
|
|
w_src, h_src = video_size(source)
|
|
w_dst, h_dst = settings['video_size']
|
|
logger.debug('Video size: %i, %i -> %i, %i', w_src, h_src, w_dst, h_dst)
|
|
|
|
base, src_ext = splitext(source)
|
|
base, dst_ext = splitext(outname)
|
|
if dst_ext == src_ext and w_src <= w_dst and h_src <= h_dst:
|
|
logger.debug('Video is smaller than the max size, copying it instead')
|
|
shutil.copy(source, outname)
|
|
return
|
|
|
|
# http://stackoverflow.com/questions/8218363/maintaining-ffmpeg-aspect-ratio
|
|
# + I made a drawing on paper to figure this out
|
|
if h_dst * w_src < h_src * w_dst:
|
|
# biggest fitting dimension is height
|
|
resize_opt = ['-vf', "scale=trunc(oh*a/2)*2:%i" % h_dst]
|
|
else:
|
|
# biggest fitting dimension is width
|
|
resize_opt = ['-vf', "scale=%i:trunc(ow/a/2)*2" % w_dst]
|
|
|
|
# do not resize if input dimensions are smaller than output dimensions
|
|
if w_src <= w_dst and h_src <= h_dst:
|
|
resize_opt = []
|
|
|
|
# Encoding options improved, thanks to
|
|
# http://ffmpeg.org/trac/ffmpeg/wiki/vpxEncodingGuide
|
|
cmd = ['ffmpeg', '-i', source, '-y'] # -y to overwrite output files
|
|
if options is not None:
|
|
cmd += options
|
|
cmd += resize_opt + [outname]
|
|
|
|
logger.debug('Processing video: %s', ' '.join(cmd))
|
|
check_subprocess(cmd, source, outname)
|
|
|
|
|
|
def generate_thumbnail(source, outname, box, delay, fit=True, options=None):
|
|
"""Create a thumbnail image for the video source, based on ffmpeg."""
|
|
|
|
logger = logging.getLogger(__name__)
|
|
tmpfile = outname + ".tmp.jpg"
|
|
|
|
# dump an image of the video
|
|
cmd = ['ffmpeg', '-i', source, '-an', '-r', '1',
|
|
'-ss', delay, '-vframes', '1', '-y', tmpfile]
|
|
logger.debug('Create thumbnail for video: %s', ' '.join(cmd))
|
|
check_subprocess(cmd, source, outname)
|
|
|
|
# use the generate_thumbnail function from sigal.image
|
|
image.generate_thumbnail(tmpfile, outname, box, fit, options)
|
|
# remove the image
|
|
os.unlink(tmpfile)
|
|
|
|
|
|
def process_video(filepath, outpath, settings):
|
|
"""Process a video: resize, create thumbnail."""
|
|
|
|
logger = logging.getLogger(__name__)
|
|
filename = os.path.split(filepath)[1]
|
|
basename, ext = splitext(filename)
|
|
|
|
try:
|
|
if settings['use_orig'] and is_valid_html5_video(ext):
|
|
outname = os.path.join(outpath, filename)
|
|
utils.copy(filepath, outname, symlink=settings['orig_link'])
|
|
else:
|
|
valid_formats = ['mp4', 'webm']
|
|
video_format = settings['video_format']
|
|
|
|
if video_format not in valid_formats:
|
|
logger.error('Invalid video_format. Please choose one of: %s',
|
|
valid_formats)
|
|
raise ValueError
|
|
|
|
outname = os.path.join(outpath, basename + '.' + video_format)
|
|
generate_video(filepath, outname, settings,
|
|
options=settings.get(video_format + '_options'))
|
|
except Exception:
|
|
if logger.getEffectiveLevel() == logging.DEBUG:
|
|
raise
|
|
else:
|
|
return Status.FAILURE
|
|
|
|
if settings['make_thumbs']:
|
|
thumb_name = os.path.join(outpath, get_thumb(settings, filename))
|
|
try:
|
|
generate_thumbnail(
|
|
outname, thumb_name, settings['thumb_size'],
|
|
settings['thumb_video_delay'], fit=settings['thumb_fit'],
|
|
options=settings['jpg_options'])
|
|
except Exception:
|
|
if logger.getEffectiveLevel() == logging.DEBUG:
|
|
raise
|
|
else:
|
|
return Status.FAILURE
|
|
|
|
return Status.SUCCESS
|