forked from 0x2620/pandora
chop/encode mp4 and include subtitles
This commit is contained in:
parent
0fd86dfa78
commit
ba5e4af355
3 changed files with 240 additions and 18 deletions
202
pandora/archive/chop.py
Normal file
202
pandora/archive/chop.py
Normal file
|
@ -0,0 +1,202 @@
|
||||||
|
import json
|
||||||
|
import os
|
||||||
|
import subprocess
|
||||||
|
from bisect import bisect_left
|
||||||
|
|
||||||
|
import ox
|
||||||
|
|
||||||
|
class Chop(object):
|
||||||
|
keyframes = []
|
||||||
|
subtitles = None
|
||||||
|
info = {}
|
||||||
|
ffmpeg = [
|
||||||
|
'ffmpeg',
|
||||||
|
'-nostats', '-loglevel', 'error',
|
||||||
|
'-y',
|
||||||
|
]
|
||||||
|
|
||||||
|
def __init__(self, source, output, start, end, subtitles=None):
|
||||||
|
self.video = source
|
||||||
|
self.subtitles = subtitles
|
||||||
|
output_file, output_ext = os.path.splitext(output)
|
||||||
|
sections = self.get_gop_sections(start, end)
|
||||||
|
|
||||||
|
if output_ext == '.mp4':
|
||||||
|
part_ext = '.ts'
|
||||||
|
else:
|
||||||
|
part_ext = output_ext
|
||||||
|
start_part = output + '.start' + part_ext
|
||||||
|
middle_part = output + '.middle' + part_ext
|
||||||
|
end_part = output + '.end' + part_ext
|
||||||
|
|
||||||
|
segments = []
|
||||||
|
cmds = []
|
||||||
|
|
||||||
|
# prepare subtitles
|
||||||
|
if self.subtitles:
|
||||||
|
self.subtitles_output = output_file + '.srt'
|
||||||
|
cmd = self.ffmpeg + [
|
||||||
|
'-i', self.subtitles,
|
||||||
|
'-ss', '%f' % start, '-t', '%f' % (end-start),
|
||||||
|
self.subtitles_output
|
||||||
|
]
|
||||||
|
cmds.append(cmd)
|
||||||
|
|
||||||
|
# re-encode up to keyframe
|
||||||
|
if sections['start'][1] > sections['start'][0]:
|
||||||
|
cmd = self.encode(source, start_part,
|
||||||
|
start=start,
|
||||||
|
duration=sections['start'][1] - start)
|
||||||
|
cmds.append(cmd)
|
||||||
|
segments.append(start_part)
|
||||||
|
# cut out middle segment
|
||||||
|
if sections['end'][1] - sections['start'][2] > 0:
|
||||||
|
cmd = self.copy(source, middle_part,
|
||||||
|
start=sections['start'][2],
|
||||||
|
duration=sections['end'][1] - sections['start'][2])
|
||||||
|
cmds.append(cmd)
|
||||||
|
segments.append(middle_part)
|
||||||
|
# re-encode after last keyframe
|
||||||
|
if sections['end'][2] > sections['end'][1]:
|
||||||
|
cmd = self.encode(source, end_part,
|
||||||
|
start=sections['end'][1],
|
||||||
|
duration=end - sections['end'][1])
|
||||||
|
cmds.append(cmd)
|
||||||
|
segments.append(end_part)
|
||||||
|
|
||||||
|
if len(segments) > 1:
|
||||||
|
cmd, files = self.join(segments, output)
|
||||||
|
cmds.append(cmd)
|
||||||
|
segments += files
|
||||||
|
else:
|
||||||
|
cmds.append(['cp', segments[0], output])
|
||||||
|
|
||||||
|
for cmd in cmds:
|
||||||
|
#print(' '.join(cmd))
|
||||||
|
subprocess.call(cmd)
|
||||||
|
for segment in segments:
|
||||||
|
os.unlink(segment)
|
||||||
|
|
||||||
|
def get_info(self):
|
||||||
|
if self.info:
|
||||||
|
return self.info
|
||||||
|
self.info = ox.avinfo(self.video)
|
||||||
|
return self.info
|
||||||
|
|
||||||
|
def get_keyframes(self):
|
||||||
|
video = self.video
|
||||||
|
if self.keyframes:
|
||||||
|
return self.keyframes
|
||||||
|
|
||||||
|
keyframes_cache = video + '.keyframes'
|
||||||
|
if os.path.exists(keyframes_cache):
|
||||||
|
with open(keyframes_cache, 'r') as fd:
|
||||||
|
self.keyframes = json.load(fd)
|
||||||
|
return self.keyframes
|
||||||
|
|
||||||
|
cmd = [
|
||||||
|
'ffprobe',
|
||||||
|
'-v', 'error',
|
||||||
|
'-show_packets', '-select_streams', 'v',
|
||||||
|
'-show_entries', 'packet=pts_time,flags',
|
||||||
|
'-of', 'csv',
|
||||||
|
'-i', video
|
||||||
|
]
|
||||||
|
p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
|
||||||
|
stdout, stderr = p.communicate()
|
||||||
|
result = stdout.decode().strip()
|
||||||
|
keyframe_times = []
|
||||||
|
timecode = 0
|
||||||
|
for line in result.split('\n'):
|
||||||
|
if line.split(',')[1] != 'N/A':
|
||||||
|
timecode = line.split(',')[1]
|
||||||
|
if ',K' in line:
|
||||||
|
keyframe_times.append(float(timecode))
|
||||||
|
|
||||||
|
last_keyframe = self.get_info()['duration']
|
||||||
|
if keyframe_times[-1] != last_keyframe:
|
||||||
|
keyframe_times.append(last_keyframe)
|
||||||
|
|
||||||
|
self.keyframes = keyframe_times
|
||||||
|
if not os.path.exists(keyframes_cache):
|
||||||
|
with open(keyframes_cache, 'w') as fd:
|
||||||
|
json.dump(keyframe_times, fd)
|
||||||
|
return keyframe_times
|
||||||
|
|
||||||
|
def get_gop_sections(self, start: float, end: float) -> dict:
|
||||||
|
keyframes = self.get_keyframes()
|
||||||
|
start_pos = bisect_left(keyframes, start)
|
||||||
|
end_pos = bisect_left(keyframes, end)
|
||||||
|
return {
|
||||||
|
'start': (
|
||||||
|
keyframes[start_pos - 1] if start_pos > 0 else keyframes[start_pos],
|
||||||
|
keyframes[start_pos],
|
||||||
|
keyframes[start_pos + 1]
|
||||||
|
),
|
||||||
|
'end': (
|
||||||
|
keyframes[end_pos - 2] if end_pos != (len(keyframes) - 1) else keyframes[end_pos - 1],
|
||||||
|
keyframes[end_pos - 1] if end_pos != (len(keyframes) - 1) else keyframes[end_pos],
|
||||||
|
keyframes[end_pos]
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
def encode(self, source, target, start, duration):
|
||||||
|
info = self.get_info()
|
||||||
|
if self.info['audio']:
|
||||||
|
acodec = [
|
||||||
|
'-c:a',
|
||||||
|
self.info['audio'][0]['codec']
|
||||||
|
]
|
||||||
|
else:
|
||||||
|
acodec = []
|
||||||
|
vcodec = [
|
||||||
|
'-c:v',
|
||||||
|
self.info['video'][0]['codec']
|
||||||
|
]
|
||||||
|
|
||||||
|
cmd = self.ffmpeg + [
|
||||||
|
'-ss', '%f' % start,
|
||||||
|
'-i', source,
|
||||||
|
'-t', '%f' % duration,
|
||||||
|
'-reset_timestamps', '1',
|
||||||
|
] + acodec + [
|
||||||
|
] + vcodec + [
|
||||||
|
target
|
||||||
|
]
|
||||||
|
return cmd
|
||||||
|
|
||||||
|
def copy(self, source, target, start, duration):
|
||||||
|
cmd = self.ffmpeg + [
|
||||||
|
'-ss', '%f' % start,
|
||||||
|
'-i', source,
|
||||||
|
'-t', '%f' % duration,
|
||||||
|
'-c:v', 'copy', '-c:a', 'copy',
|
||||||
|
'-reset_timestamps', '1',
|
||||||
|
target
|
||||||
|
]
|
||||||
|
return cmd
|
||||||
|
|
||||||
|
def join(self, segments, target):
|
||||||
|
file_list = target + '.txt'
|
||||||
|
with open(file_list, 'w') as fd:
|
||||||
|
for segment in segments:
|
||||||
|
fd.write('file %s\n' % segment)
|
||||||
|
if self.subtitles:
|
||||||
|
subtitles = [
|
||||||
|
'-i', self.subtitles_output,
|
||||||
|
'-c:s', 'mov_text'
|
||||||
|
]
|
||||||
|
else:
|
||||||
|
subtitles = []
|
||||||
|
cmd = self.ffmpeg + [
|
||||||
|
'-f', 'concat', '-safe', '0', '-i', file_list,
|
||||||
|
] + subtitles + [
|
||||||
|
'-c:v', 'copy', '-c:a', 'copy',
|
||||||
|
'-reset_timestamps', '1',
|
||||||
|
target
|
||||||
|
]
|
||||||
|
files = [file_list]
|
||||||
|
if self.subtitles:
|
||||||
|
files.append(self.subtitles_output)
|
||||||
|
return cmd, files
|
||||||
|
|
|
@ -602,11 +602,23 @@ def timeline_strip(item, cuts, info, prefix):
|
||||||
timeline_image.save(timeline_file)
|
timeline_image.save(timeline_file)
|
||||||
|
|
||||||
|
|
||||||
def chop(video, start, end):
|
def chop(video, start, end, subtitles=None):
|
||||||
t = end - start
|
t = end - start
|
||||||
tmp = tempfile.mkdtemp()
|
tmp = tempfile.mkdtemp()
|
||||||
ext = os.path.splitext(video)[1]
|
ext = os.path.splitext(video)[1]
|
||||||
choped_video = '%s/tmp%s' % (tmp, ext)
|
choped_video = '%s/tmp%s' % (tmp, ext)
|
||||||
|
if subtitles and ext == '.mp4':
|
||||||
|
subtitles_f = choped_video + '.full.srt'
|
||||||
|
with open(subtitles_f, 'wb') as fd:
|
||||||
|
fd.write(subtitles)
|
||||||
|
else:
|
||||||
|
subtitles_f = None
|
||||||
|
if ext == '.mp4':
|
||||||
|
from .chop import Chop
|
||||||
|
Chop(video, choped_video, start, end, subtitles_f)
|
||||||
|
if subtitles_f:
|
||||||
|
os.unlink(subtitles_f)
|
||||||
|
else:
|
||||||
cmd = [
|
cmd = [
|
||||||
settings.FFMPEG,
|
settings.FFMPEG,
|
||||||
'-y',
|
'-y',
|
||||||
|
|
|
@ -1044,7 +1044,15 @@ def video(request, id, resolution, format, index=None, track=None):
|
||||||
|
|
||||||
content_type = mimetypes.guess_type(path)[0]
|
content_type = mimetypes.guess_type(path)[0]
|
||||||
if len(t) == 2 and t[1] > t[0] and duration >= t[1]:
|
if len(t) == 2 and t[1] > t[0] and duration >= t[1]:
|
||||||
response = HttpResponse(extract.chop(path, t[0], t[1]), content_type=content_type)
|
# FIXME: could be multilingual here
|
||||||
|
subtitles = utils.get_by_key(settings.CONFIG['layers'], 'isSubtitles', True)
|
||||||
|
if subtitles:
|
||||||
|
srt = item.srt(subtitles['id'], encoder=ox.srt)
|
||||||
|
if len(srt) < 4:
|
||||||
|
srt = None
|
||||||
|
else:
|
||||||
|
srt = None
|
||||||
|
response = HttpResponse(extract.chop(path, t[0], t[1], subtitles=srt), content_type=content_type)
|
||||||
filename = u"Clip of %s - %s-%s - %s %s%s" % (
|
filename = u"Clip of %s - %s-%s - %s %s%s" % (
|
||||||
item.get('title'),
|
item.get('title'),
|
||||||
ox.format_duration(t[0] * 1000).replace(':', '.')[:-4],
|
ox.format_duration(t[0] * 1000).replace(':', '.')[:-4],
|
||||||
|
|
Loading…
Reference in a new issue