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render all fragments

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j 2023-10-10 16:16:59 +01:00
parent a5957fc3b2
commit d113c5d79e
4 changed files with 99 additions and 36 deletions
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1
.gitignore vendored
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@ -1 +1,2 @@
*.pyc
*.swp

35
management/commands/render.py
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@ -5,7 +5,7 @@ import subprocess
from django.core.management.base import BaseCommand
from django.conf import settings
from ...render import compose, render
from ...render import render_all
class Command(BaseCommand):
@ -13,38 +13,9 @@ class Command(BaseCommand):
def add_arguments(self, parser):
parser.add_argument('--prefix', action='store', dest='prefix', default="/srv/t_for_time", help='prefix to build clips in')
parser.add_argument('--duration', action='store', dest='duration', default="150", help='target duration in seconds')
parser.add_argument('--duration', action='store', dest='duration', default="3600", help='target duration of all fragments in seconds')
parser.add_argument('--offset', action='store', dest='offset', default="1024", help='inital offset in pi')
parser.add_argument('--no-video', action='store_true', dest='no_video', default=False, help='don\'t render video')
def handle(self, **options):
prefix = options['prefix']
target = int(options['duration'])
base = int(options['offset'])
with open(os.path.join(prefix, "clips.json")) as fd:
clips = json.load(fd)
scene = compose(clips, target=target, base=base)
timelines = render(prefix, scene, 'scene-%s-' % base)
with open(os.path.join(prefix, 'scene-%s.json' % base), 'w') as fd:
json.dump(scene, fd, indent=2, ensure_ascii=False)
if not options['no_video']:
for timeline in timelines:
ext = '.mp4'
if '-audio.kdenlive' in timeline:
ext = '.wav'
cmd = [
'xvfb-run', '-a',
'melt', timeline,
'-consumer', 'avformat:%s' % timeline.replace('.kdenlive', ext)
]
subprocess.call(cmd)
if ext == '.wav':
cmd = [
'ffmpeg', '-i',
timeline.replace('.kdenlive', ext),
timeline.replace('.kdenlive', '.mp4')
]
subprocess.call(cmd)
os.unlink(timeline.replace('.kdenlive', ext))
render_all(options)

95
render.py
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@ -54,10 +54,12 @@ def compose(clips, target=150, base=1024):
}
all_clips = clips.copy()
seq = random(base)
while target - length > 10 and clips:
while target - length > 0 and clips:
clip = random_choice(seq, clips, True)
if not clips:
clips = [c for c in all_clips if c != clip]
if not clips:
clips = all_clips.copy()
if length + clip['duration'] > target:
break
length += clip['duration']
@ -119,17 +121,24 @@ def compose(clips, target=150, base=1024):
})
return scene
def get_scene_duration(scene):
duration = 0
for key, value in scene.items():
for name, clips in value.items():
for clip in clips:
duration += clip['duration']
return duration
def render(root, scene, prefix=''):
fps = 24
files = []
for timeline, data in scene.items():
print(timeline)
#print(timeline)
project = KDEnliveProject(root)
tracks = []
for track, clips in data.items():
print(track)
#print(track)
for clip in clips:
project.append_clip(track, clip)
path = os.path.join(root, prefix + "%s.kdenlive" % timeline)
@ -137,3 +146,83 @@ def render(root, scene, prefix=''):
fd.write(project.to_xml())
files.append(path)
return files
def get_fragments(clips):
import itemlist.models
fragments = []
for l in itemlist.models.List.objects.filter(status='featured').order_by('name'):
if l.name.split(' ')[0].isdigit():
fragment = {
'name': l.name,
'tags': [t['value'] for t in l.query['conditions'][1]['conditions']],
'description': l.description
}
fragment['clips'] = []
for clip in clips:
if set(clip['tags']) & set(fragment['tags']):
fragment['clips'].append(clip)
fragments.append(fragment)
fragments.sort(key=lambda f: ox.sort_string(f['name']))
return fragments
def render_all(options):
prefix = options['prefix']
duration = int(options['duration'])
base = int(options['offset'])
with open(os.path.join(prefix, "clips.json")) as fd:
clips = json.load(fd)
fragments = get_fragments(clips)
position = target_position = 0
target = fragment_target = duration / len(fragments)
base_prefix = os.path.join(prefix, 'render', str(base))
for fragment in fragments:
n = int(fragment['name'].split(' ')[0])
name = fragment['name'].replace(' ', '_')
if n < 10:
name = '0' + name
if not fragment['clips']:
print("skipping empty fragment", name)
continue
fragment_prefix = os.path.join(base_prefix, name)
os.makedirs(fragment_prefix, exist_ok=True)
scene = compose(fragment['clips'], target=target, base=base)
scene_duration = get_scene_duration(scene)
print("%s %s -> %s (%s)" % (name, target, scene_duration, fragment_target))
position += scene_duration
target_position += fragment_target
if position > target_position:
target = fragment_target - (position-target_position)
print("adjusting target from", fragment_target, target)
elif position < target_position:
target = target + 0.1 * fragment_target
timelines = render(prefix, scene, fragment_prefix[len(prefix) + 1:] + '/')
with open(os.path.join(fragment_prefix, 'scene.json'), 'w') as fd:
json.dump(scene, fd, indent=2, ensure_ascii=False)
if not options['no_video']:
for timeline in timelines:
ext = '.mp4'
if '-audio.kdenlive' in timeline:
ext = '.wav'
cmd = [
'xvfb-run', '-a',
'melt', timeline,
'-consumer', 'avformat:%s' % timeline.replace('.kdenlive', ext)
]
subprocess.call(cmd)
if ext == '.wav':
cmd = [
'ffmpeg', '-i',
timeline.replace('.kdenlive', ext),
timeline.replace('.kdenlive', '.mp4')
]
subprocess.call(cmd)
os.unlink(timeline.replace('.kdenlive', ext))
print("Duration - Target: %s Actual: %s" % (target_position, position))

4
render_kdenlive.py
View file

@ -449,7 +449,7 @@ class KDEnliveProject:
filters = clip.get("filter", {})
frames = int(self._fps * clip['duration'])
self._duration[track_id] += frames
print(path, filters)
#print(path, filters)
chain = self.get_chain(path)
id = get_propery(chain, "kdenlive:id")
if track_id == "V1":
@ -513,3 +513,5 @@ class KDEnliveProject:
"out": chain.attrib["out"],
}),
)