mirror of
https://github.com/Kunsi/pretalx-plugin-broadcast-tools
synced 2025-04-29 04:20:57 +00:00
add downloadable lower thirds images to be used in voctomix
This commit is contained in:
parent
f459c6c498
commit
c0b3bdb55e
GPG key ID:
12E3D2136B818350
11 changed files with 651 additions and 83 deletions
|
|
@ -0,0 +1,336 @@
|
|||
import logging
|
||||
import tarfile
|
||||
from pathlib import Path
|
||||
|
||||
from django.conf import settings
|
||||
from django.core.management.base import BaseCommand, CommandError
|
||||
from django_scopes import scope, scopes_disabled
|
||||
from PIL import Image, ImageDraw, ImageFont
|
||||
from pretalx.agenda.management.commands.export_schedule_html import delete_directory
|
||||
from pretalx.event.models import Event
|
||||
|
||||
from pretalx_broadcast_tools.utils.placeholders import placeholders
|
||||
|
||||
IMG_WIDTH = 1920 # px
|
||||
IMG_HEIGHT = 1080 # px
|
||||
|
||||
FONT_SIZE_TITLE = 30 # px
|
||||
FONT_SIZE_SPEAKER = 25 # px
|
||||
FONT_SIZE_INFOLINE = 18 # px
|
||||
FONT_FILE = (
|
||||
Path(__file__).resolve().parent.parent.parent
|
||||
/ "assets"
|
||||
/ "titilium-web-regular.ttf"
|
||||
)
|
||||
|
||||
BOX_PADDING = 10 # px
|
||||
|
||||
BOX_WIDTH = int(IMG_WIDTH * 0.8)
|
||||
BOX_BOTTOM = int(IMG_HEIGHT - (IMG_HEIGHT * 0.1))
|
||||
BOX_LEFT = int((IMG_WIDTH - BOX_WIDTH) / 2)
|
||||
|
||||
|
||||
def get_export_path(event):
|
||||
return settings.HTMLEXPORT_ROOT / event.slug / "broadcast-tools"
|
||||
|
||||
|
||||
def get_export_targz_path(event):
|
||||
return get_export_path(event).with_suffix(".voctomix.tar.gz")
|
||||
|
||||
|
||||
def make_targz(generated_files, targz_path):
|
||||
tmp_name = targz_path.with_suffix(".tmp")
|
||||
tmp_name.unlink(missing_ok=True)
|
||||
with tarfile.open(tmp_name, "w:gz") as tar:
|
||||
for file in generated_files:
|
||||
tar.add(file, arcname=file.name)
|
||||
tmp_name.rename(targz_path)
|
||||
|
||||
|
||||
class VoctomixLowerThirdsExporter:
|
||||
def __init__(self, event, tmp_dir):
|
||||
self.log = logging.getLogger(event.slug)
|
||||
self.event = event
|
||||
self.tmp_dir = tmp_dir
|
||||
self.exported = set()
|
||||
|
||||
if event.primary_color:
|
||||
self.primary_colour = self._hex2rgb(event.primary_color)
|
||||
else:
|
||||
# pretalx.settings.DEFAULT_EVENT_PRIMARY_COLOR
|
||||
self.primary__color = (58, 165, 124)
|
||||
|
||||
self.infoline = event.settings.broadcast_tools_lower_thirds_info_string or ""
|
||||
|
||||
self.font_title = ImageFont.truetype(
|
||||
FONT_FILE,
|
||||
size=FONT_SIZE_TITLE,
|
||||
encoding="unic",
|
||||
)
|
||||
self.font_speaker = ImageFont.truetype(
|
||||
FONT_FILE,
|
||||
size=FONT_SIZE_SPEAKER,
|
||||
encoding="unic",
|
||||
)
|
||||
self.font_infoline = ImageFont.truetype(
|
||||
FONT_FILE,
|
||||
size=FONT_SIZE_INFOLINE,
|
||||
encoding="unic",
|
||||
)
|
||||
|
||||
def _hex2rgb(self, hex_value):
|
||||
hex_value = hex_value.lstrip("#")
|
||||
# black insists this should have spaces around the :, but flake8
|
||||
# complains about spaces around the :, soooooo ....
|
||||
return tuple(int(hex_value[i : i + 2], 16) for i in (0, 2, 4)) # NOQA
|
||||
|
||||
def _fit_text(self, input_text, font, max_width):
|
||||
words = [i.strip() for i in input_text.split()]
|
||||
lines = []
|
||||
line = []
|
||||
for word in words:
|
||||
new_line = " ".join([*line, word])
|
||||
_, _, w, _ = font.getbbox(new_line)
|
||||
if w > max_width:
|
||||
# append old line to list of lines, then start new line with
|
||||
# current word
|
||||
lines.append(" ".join(line))
|
||||
line = [word]
|
||||
elif word.endswith(":"):
|
||||
lines.append(new_line)
|
||||
line = []
|
||||
else:
|
||||
line.append(word)
|
||||
|
||||
if line:
|
||||
lines.append(" ".join(line))
|
||||
return lines
|
||||
|
||||
def _get_infoline(self, talk):
|
||||
infoline = self.infoline.localize(self.event.locale).format(
|
||||
**placeholders(
|
||||
self.event,
|
||||
talk,
|
||||
)
|
||||
)
|
||||
_, _, w, _ = self.font_infoline.getbbox(infoline)
|
||||
return w, infoline
|
||||
|
||||
def export_speaker(self, talk, speaker):
|
||||
img = Image.new(
|
||||
mode="RGBA",
|
||||
size=(IMG_WIDTH, IMG_HEIGHT),
|
||||
color=(0, 0, 0, 0),
|
||||
)
|
||||
|
||||
speaker_text = self._fit_text(
|
||||
speaker.get_display_name(),
|
||||
self.font_speaker,
|
||||
BOX_WIDTH,
|
||||
)
|
||||
infoline_width, infoline_text = self._get_infoline(talk)
|
||||
|
||||
y_pos = BOX_BOTTOM - BOX_PADDING
|
||||
if speaker_text:
|
||||
y_pos -= len(speaker_text) * FONT_SIZE_SPEAKER
|
||||
if infoline_text:
|
||||
y_pos -= FONT_SIZE_INFOLINE
|
||||
|
||||
draw = ImageDraw.Draw(img)
|
||||
draw.rectangle(
|
||||
[
|
||||
(BOX_LEFT - BOX_PADDING, y_pos),
|
||||
(BOX_LEFT + BOX_WIDTH + BOX_PADDING, BOX_BOTTOM + BOX_PADDING),
|
||||
],
|
||||
fill=self.primary_colour,
|
||||
)
|
||||
if talk.submission.track and talk.submission.track.color:
|
||||
draw.rectangle(
|
||||
[
|
||||
(BOX_LEFT - BOX_PADDING, BOX_BOTTOM + BOX_PADDING),
|
||||
(
|
||||
BOX_LEFT + BOX_WIDTH + BOX_PADDING,
|
||||
BOX_BOTTOM + (BOX_PADDING * 2),
|
||||
),
|
||||
],
|
||||
fill=self._hex2rgb(talk.submission.track.color),
|
||||
)
|
||||
|
||||
for line in speaker_text:
|
||||
draw.text(
|
||||
(BOX_LEFT, y_pos),
|
||||
line,
|
||||
font=self.font_speaker,
|
||||
fill=(255, 255, 255),
|
||||
)
|
||||
y_pos += FONT_SIZE_SPEAKER
|
||||
|
||||
if infoline_text:
|
||||
draw.text(
|
||||
(BOX_LEFT + BOX_WIDTH - infoline_width, y_pos),
|
||||
infoline_text,
|
||||
font=self.font_infoline,
|
||||
fill=(255, 255, 255),
|
||||
)
|
||||
|
||||
filename = self.tmp_dir / f"event_{talk.submission_id}_person_{speaker.id}.png"
|
||||
img.save(filename)
|
||||
self.log.debug(
|
||||
f"Generated single-speaker image for {speaker.get_display_name()!r} "
|
||||
"of talk {talk.submission.title!r}, saved as {filename}"
|
||||
)
|
||||
return filename
|
||||
|
||||
def export_talk(self, talk):
|
||||
img = Image.new(
|
||||
mode="RGBA",
|
||||
size=(IMG_WIDTH, IMG_HEIGHT),
|
||||
color=(0, 0, 0, 0),
|
||||
)
|
||||
|
||||
title_text = self._fit_text(talk.submission.title, self.font_title, BOX_WIDTH)
|
||||
speaker_text = self._fit_text(
|
||||
", ".join(
|
||||
[person.get_display_name() for person in talk.submission.speakers.all()]
|
||||
),
|
||||
self.font_speaker,
|
||||
BOX_WIDTH,
|
||||
)
|
||||
infoline_width, infoline_text = self._get_infoline(talk)
|
||||
|
||||
y_pos = BOX_BOTTOM - BOX_PADDING
|
||||
if title_text:
|
||||
y_pos -= len(title_text) * FONT_SIZE_TITLE
|
||||
if speaker_text:
|
||||
y_pos -= len(speaker_text) * FONT_SIZE_SPEAKER
|
||||
if title_text and speaker_text:
|
||||
y_pos -= BOX_PADDING
|
||||
if infoline_text:
|
||||
y_pos -= FONT_SIZE_INFOLINE
|
||||
|
||||
draw = ImageDraw.Draw(img)
|
||||
draw.rectangle(
|
||||
[
|
||||
(BOX_LEFT - BOX_PADDING, y_pos),
|
||||
(BOX_LEFT + BOX_WIDTH + BOX_PADDING, BOX_BOTTOM + BOX_PADDING),
|
||||
],
|
||||
fill=self.primary_colour,
|
||||
)
|
||||
if talk.submission.track and talk.submission.track.color:
|
||||
draw.rectangle(
|
||||
[
|
||||
(BOX_LEFT - BOX_PADDING, BOX_BOTTOM + BOX_PADDING),
|
||||
(
|
||||
BOX_LEFT + BOX_WIDTH + BOX_PADDING,
|
||||
BOX_BOTTOM + (BOX_PADDING * 2),
|
||||
),
|
||||
],
|
||||
fill=self._hex2rgb(talk.submission.track.color),
|
||||
)
|
||||
|
||||
for line in title_text:
|
||||
draw.text(
|
||||
(BOX_LEFT, y_pos),
|
||||
line,
|
||||
font=self.font_title,
|
||||
fill=(255, 255, 255),
|
||||
)
|
||||
y_pos += FONT_SIZE_TITLE
|
||||
|
||||
if title_text and speaker_text:
|
||||
y_pos += BOX_PADDING
|
||||
|
||||
for line in speaker_text:
|
||||
draw.text(
|
||||
(BOX_LEFT, y_pos),
|
||||
line,
|
||||
font=self.font_speaker,
|
||||
fill=(255, 255, 255),
|
||||
)
|
||||
y_pos += FONT_SIZE_SPEAKER
|
||||
|
||||
if infoline_text:
|
||||
draw.text(
|
||||
(BOX_LEFT + BOX_WIDTH - infoline_width, y_pos),
|
||||
infoline_text,
|
||||
font=self.font_infoline,
|
||||
fill=(255, 255, 255),
|
||||
)
|
||||
|
||||
filename = self.tmp_dir / f"event_{talk.submission_id}_persons.png"
|
||||
img.save(filename)
|
||||
self.log.debug(
|
||||
f"Generated image for talk {talk.submission.title!r}, saved as {filename}"
|
||||
)
|
||||
return filename
|
||||
|
||||
def export(self):
|
||||
generated_files = set()
|
||||
if not self.event.current_schedule:
|
||||
raise CommandError(
|
||||
f"event {self.event.slug} ({self.event.name}) does not have a schedule to be exported!"
|
||||
)
|
||||
|
||||
self.log.info(
|
||||
f"Generating voctomix-compatible lower thirds for event {self.event.name}"
|
||||
)
|
||||
|
||||
for talk in self.event.current_schedule.talks.filter(
|
||||
is_visible=True
|
||||
).select_related("submission"):
|
||||
if talk.id in self.exported:
|
||||
# account for talks that are scheduled multiple times
|
||||
self.log.warning(
|
||||
f"Talk {talk.submission.title!r} was already generated, skipping. "
|
||||
"(Possibly scheduled multiple times?)"
|
||||
)
|
||||
continue
|
||||
|
||||
self.log.info(f"Generating image(s) for talk {talk.submission.title!r}")
|
||||
generated_files.add(self.export_talk(talk))
|
||||
for speaker in talk.submission.speakers.all():
|
||||
generated_files.add(self.export_speaker(talk, speaker))
|
||||
self.exported.add(talk.id)
|
||||
|
||||
return generated_files
|
||||
|
||||
|
||||
class Command(BaseCommand):
|
||||
def add_arguments(self, parser):
|
||||
super().add_arguments(parser)
|
||||
parser.add_argument("event", type=str)
|
||||
parser.add_argument("--no-delete-source-files", action="store_true")
|
||||
|
||||
def handle(self, *args, **options):
|
||||
event_slug = options.get("event")
|
||||
|
||||
with scopes_disabled():
|
||||
try:
|
||||
event = Event.objects.get(slug__iexact=event_slug)
|
||||
except Event.DoesNotExist:
|
||||
raise CommandError(f"could not find event with slug {event_slug!r}")
|
||||
|
||||
with scope(event=event):
|
||||
logging.info(f"Exporting {event.name}")
|
||||
|
||||
export_dir = get_export_path(event)
|
||||
targz_path = get_export_targz_path(event)
|
||||
|
||||
delete_directory(export_dir)
|
||||
# for the first export of the conference, the "broadcast-tools"
|
||||
# directory does not exist
|
||||
export_dir.mkdir(parents=True)
|
||||
|
||||
try:
|
||||
exporter = VoctomixLowerThirdsExporter(event, export_dir)
|
||||
generated_files = exporter.export()
|
||||
make_targz(generated_files, targz_path)
|
||||
except Exception:
|
||||
logging.exception(f"Export of {event.name} failed")
|
||||
else:
|
||||
logging.info(
|
||||
f"Export of {event.name} succeeded, export available at {targz_path}"
|
||||
)
|
||||
finally:
|
||||
if not options.get("no_delete_source_files"):
|
||||
delete_directory(export_dir)
|
||||
Loading…
Add table
Add a link
Reference in a new issue