mirror of
https://github.com/3b1b/manim.git
synced 2025-04-13 09:47:07 +00:00
437 lines
15 KiB
Python
437 lines
15 KiB
Python
from __future__ import annotations
|
|
|
|
import os
|
|
import platform
|
|
import shutil
|
|
import subprocess as sp
|
|
import sys
|
|
|
|
import numpy as np
|
|
from pydub import AudioSegment
|
|
from tqdm import tqdm as ProgressDisplay
|
|
|
|
from manimlib.constants import FFMPEG_BIN
|
|
from manimlib.logger import log
|
|
from manimlib.mobject.mobject import Mobject
|
|
from manimlib.utils.config_ops import digest_config
|
|
from manimlib.utils.file_ops import add_extension_if_not_present
|
|
from manimlib.utils.file_ops import get_sorted_integer_files
|
|
from manimlib.utils.file_ops import guarantee_existence
|
|
from manimlib.utils.sounds import get_full_sound_file_path
|
|
|
|
from typing import TYPE_CHECKING
|
|
|
|
if TYPE_CHECKING:
|
|
from PIL.Image import Image
|
|
|
|
from manimlib.camera.camera import Camera
|
|
from manimlib.scene.scene import Scene
|
|
|
|
|
|
class SceneFileWriter(object):
|
|
CONFIG = {
|
|
"write_to_movie": False,
|
|
"break_into_partial_movies": False,
|
|
# TODO, save_pngs is doing nothing
|
|
"save_pngs": False,
|
|
"png_mode": "RGBA",
|
|
"save_last_frame": False,
|
|
"movie_file_extension": ".mp4",
|
|
# What python file is generating this scene
|
|
"input_file_path": "",
|
|
# Where should this be written
|
|
"output_directory": None,
|
|
"file_name": None,
|
|
"open_file_upon_completion": False,
|
|
"show_file_location_upon_completion": False,
|
|
"quiet": False,
|
|
"total_frames": 0,
|
|
"progress_description_len": 60,
|
|
}
|
|
|
|
def __init__(self, scene, **kwargs):
|
|
digest_config(self, kwargs)
|
|
self.scene: Scene = scene
|
|
self.writing_process: sp.Popen | None = None
|
|
self.has_progress_display: bool = False
|
|
self.ended_with_interrupt: bool = False
|
|
self.init_output_directories()
|
|
self.init_audio()
|
|
|
|
# Output directories and files
|
|
def init_output_directories(self) -> None:
|
|
out_dir = self.output_directory or ""
|
|
scene_name = self.file_name or self.get_default_scene_name()
|
|
if self.save_last_frame:
|
|
image_dir = guarantee_existence(os.path.join(out_dir, "images"))
|
|
image_file = add_extension_if_not_present(scene_name, ".png")
|
|
self.image_file_path = os.path.join(image_dir, image_file)
|
|
if self.write_to_movie:
|
|
movie_dir = guarantee_existence(os.path.join(out_dir, "videos"))
|
|
movie_file = add_extension_if_not_present(scene_name, self.movie_file_extension)
|
|
self.movie_file_path = os.path.join(movie_dir, movie_file)
|
|
if self.break_into_partial_movies:
|
|
self.partial_movie_directory = guarantee_existence(os.path.join(
|
|
movie_dir, "partial_movie_files", scene_name,
|
|
))
|
|
# A place to save mobjects
|
|
self.saved_mobject_directory = os.path.join(
|
|
out_dir, "mobjects", str(self.scene)
|
|
)
|
|
|
|
def get_default_module_directory(self) -> str:
|
|
path, _ = os.path.splitext(self.input_file_path)
|
|
if path.startswith("_"):
|
|
path = path[1:]
|
|
return path
|
|
|
|
def get_default_scene_name(self) -> str:
|
|
name = str(self.scene)
|
|
saan = self.scene.start_at_animation_number
|
|
eaan = self.scene.end_at_animation_number
|
|
if saan is not None:
|
|
name += f"_{saan}"
|
|
if eaan is not None:
|
|
name += f"_{eaan}"
|
|
return name
|
|
|
|
def get_resolution_directory(self) -> str:
|
|
pixel_height = self.scene.camera.pixel_height
|
|
fps = self.scene.camera.fps
|
|
return "{}p{}".format(
|
|
pixel_height, fps
|
|
)
|
|
|
|
# Directory getters
|
|
def get_image_file_path(self) -> str:
|
|
return self.image_file_path
|
|
|
|
def get_next_partial_movie_path(self) -> str:
|
|
result = os.path.join(
|
|
self.partial_movie_directory,
|
|
"{:05}{}".format(
|
|
self.scene.num_plays,
|
|
self.movie_file_extension,
|
|
)
|
|
)
|
|
return result
|
|
|
|
def get_movie_file_path(self) -> str:
|
|
return self.movie_file_path
|
|
|
|
def get_saved_mobject_directory(self) -> str:
|
|
return guarantee_existence(self.saved_mobject_directory)
|
|
|
|
def get_saved_mobject_path(self, mobject: Mobject) -> str | None:
|
|
directory = self.get_saved_mobject_directory()
|
|
files = os.listdir(directory)
|
|
default_name = str(mobject) + "_0.mob"
|
|
index = 0
|
|
while default_name in files:
|
|
default_name = default_name.replace(str(index), str(index + 1))
|
|
index += 1
|
|
if platform.system() == 'Darwin':
|
|
cmds = [
|
|
"osascript", "-e",
|
|
f"""
|
|
set chosenfile to (choose file name default name "{default_name}" default location "{directory}")
|
|
POSIX path of chosenfile
|
|
""",
|
|
]
|
|
process = sp.Popen(cmds, stdout=sp.PIPE)
|
|
file_path = process.stdout.read().decode("utf-8").split("\n")[0]
|
|
if not file_path:
|
|
return
|
|
else:
|
|
user_name = input(f"Enter mobject file name (default is {default_name}): ")
|
|
file_path = os.path.join(directory, user_name or default_name)
|
|
if os.path.exists(file_path) or os.path.exists(file_path + ".mob"):
|
|
if input(f"{file_path} already exists. Overwrite (y/n)? ") != "y":
|
|
return
|
|
if not file_path.endswith(".mob"):
|
|
file_path = file_path + ".mob"
|
|
return file_path
|
|
|
|
# Sound
|
|
def init_audio(self) -> None:
|
|
self.includes_sound: bool = False
|
|
|
|
def create_audio_segment(self) -> None:
|
|
self.audio_segment = AudioSegment.silent()
|
|
|
|
def add_audio_segment(
|
|
self,
|
|
new_segment: AudioSegment,
|
|
time: float | None = None,
|
|
gain_to_background: float | None = None
|
|
) -> None:
|
|
if not self.includes_sound:
|
|
self.includes_sound = True
|
|
self.create_audio_segment()
|
|
segment = self.audio_segment
|
|
curr_end = segment.duration_seconds
|
|
if time is None:
|
|
time = curr_end
|
|
if time < 0:
|
|
raise Exception("Adding sound at timestamp < 0")
|
|
|
|
new_end = time + new_segment.duration_seconds
|
|
diff = new_end - curr_end
|
|
if diff > 0:
|
|
segment = segment.append(
|
|
AudioSegment.silent(int(np.ceil(diff * 1000))),
|
|
crossfade=0,
|
|
)
|
|
self.audio_segment = segment.overlay(
|
|
new_segment,
|
|
position=int(1000 * time),
|
|
gain_during_overlay=gain_to_background,
|
|
)
|
|
|
|
def add_sound(
|
|
self,
|
|
sound_file: str,
|
|
time: float | None = None,
|
|
gain: float | None = None,
|
|
gain_to_background: float | None = None
|
|
) -> None:
|
|
file_path = get_full_sound_file_path(sound_file)
|
|
new_segment = AudioSegment.from_file(file_path)
|
|
if gain:
|
|
new_segment = new_segment.apply_gain(gain)
|
|
self.add_audio_segment(new_segment, time, gain_to_background)
|
|
|
|
# Writers
|
|
def begin(self) -> None:
|
|
if not self.break_into_partial_movies and self.write_to_movie:
|
|
self.open_movie_pipe(self.get_movie_file_path())
|
|
|
|
def begin_animation(self) -> None:
|
|
if self.break_into_partial_movies and self.write_to_movie:
|
|
self.open_movie_pipe(self.get_next_partial_movie_path())
|
|
|
|
def end_animation(self) -> None:
|
|
if self.break_into_partial_movies and self.write_to_movie:
|
|
self.close_movie_pipe()
|
|
|
|
def finish(self) -> None:
|
|
if self.write_to_movie:
|
|
if self.break_into_partial_movies:
|
|
self.combine_movie_files()
|
|
else:
|
|
self.close_movie_pipe()
|
|
if self.includes_sound:
|
|
self.add_sound_to_video()
|
|
self.print_file_ready_message(self.get_movie_file_path())
|
|
if self.save_last_frame:
|
|
self.scene.update_frame(ignore_skipping=True)
|
|
self.save_final_image(self.scene.get_image())
|
|
if self.should_open_file():
|
|
self.open_file()
|
|
|
|
def open_movie_pipe(self, file_path: str) -> None:
|
|
stem, ext = os.path.splitext(file_path)
|
|
self.final_file_path = file_path
|
|
self.temp_file_path = stem + "_temp" + ext
|
|
|
|
fps = self.scene.camera.fps
|
|
width, height = self.scene.camera.get_pixel_shape()
|
|
|
|
command = [
|
|
FFMPEG_BIN,
|
|
'-y', # overwrite output file if it exists
|
|
'-f', 'rawvideo',
|
|
'-s', f'{width}x{height}', # size of one frame
|
|
'-pix_fmt', 'rgba',
|
|
'-r', str(fps), # frames per second
|
|
'-i', '-', # The input comes from a pipe
|
|
'-vf', 'vflip',
|
|
'-an', # Tells FFMPEG not to expect any audio
|
|
'-loglevel', 'error',
|
|
]
|
|
if self.movie_file_extension == ".mov":
|
|
# This is if the background of the exported
|
|
# video should be transparent.
|
|
command += [
|
|
'-vcodec', 'prores_ks',
|
|
]
|
|
elif self.movie_file_extension == ".gif":
|
|
command += []
|
|
else:
|
|
command += [
|
|
'-vcodec', 'libx264',
|
|
'-pix_fmt', 'yuv420p',
|
|
]
|
|
command += [self.temp_file_path]
|
|
self.writing_process = sp.Popen(command, stdin=sp.PIPE)
|
|
|
|
if self.total_frames > 0:
|
|
self.progress_display = ProgressDisplay(
|
|
range(self.total_frames),
|
|
# bar_format="{l_bar}{bar}|{n_fmt}/{total_fmt}",
|
|
leave=False,
|
|
ascii=True if platform.system() == 'Windows' else None,
|
|
dynamic_ncols=True,
|
|
)
|
|
self.has_progress_display = True
|
|
|
|
def set_progress_display_subdescription(self, sub_desc: str) -> None:
|
|
desc_len = self.progress_description_len
|
|
file = os.path.split(self.get_movie_file_path())[1]
|
|
full_desc = f"Rendering {file} ({sub_desc})"
|
|
if len(full_desc) > desc_len:
|
|
full_desc = full_desc[:desc_len - 4] + "...)"
|
|
else:
|
|
full_desc += " " * (desc_len - len(full_desc))
|
|
self.progress_display.set_description(full_desc)
|
|
|
|
def write_frame(self, camera: Camera) -> None:
|
|
if self.write_to_movie:
|
|
raw_bytes = camera.get_raw_fbo_data()
|
|
self.writing_process.stdin.write(raw_bytes)
|
|
if self.has_progress_display:
|
|
self.progress_display.update()
|
|
|
|
def close_movie_pipe(self) -> None:
|
|
self.writing_process.stdin.close()
|
|
self.writing_process.wait()
|
|
self.writing_process.terminate()
|
|
if self.has_progress_display:
|
|
self.progress_display.close()
|
|
|
|
if not self.ended_with_interrupt:
|
|
shutil.move(self.temp_file_path, self.final_file_path)
|
|
else:
|
|
self.movie_file_path = self.temp_file_path
|
|
|
|
def combine_movie_files(self) -> None:
|
|
kwargs = {
|
|
"remove_non_integer_files": True,
|
|
"extension": self.movie_file_extension,
|
|
}
|
|
if self.scene.start_at_animation_number is not None:
|
|
kwargs["min_index"] = self.scene.start_at_animation_number
|
|
if self.scene.end_at_animation_number is not None:
|
|
kwargs["max_index"] = self.scene.end_at_animation_number
|
|
else:
|
|
kwargs["remove_indices_greater_than"] = self.scene.num_plays - 1
|
|
partial_movie_files = get_sorted_integer_files(
|
|
self.partial_movie_directory,
|
|
**kwargs
|
|
)
|
|
if len(partial_movie_files) == 0:
|
|
log.warning("No animations in this scene")
|
|
return
|
|
|
|
# Write a file partial_file_list.txt containing all
|
|
# partial movie files
|
|
file_list = os.path.join(
|
|
self.partial_movie_directory,
|
|
"partial_movie_file_list.txt"
|
|
)
|
|
with open(file_list, 'w') as fp:
|
|
for pf_path in partial_movie_files:
|
|
if os.name == 'nt':
|
|
pf_path = pf_path.replace('\\', '/')
|
|
fp.write(f"file \'{pf_path}\'\n")
|
|
|
|
movie_file_path = self.get_movie_file_path()
|
|
commands = [
|
|
FFMPEG_BIN,
|
|
'-y', # overwrite output file if it exists
|
|
'-f', 'concat',
|
|
'-safe', '0',
|
|
'-i', file_list,
|
|
'-loglevel', 'error',
|
|
'-c', 'copy',
|
|
movie_file_path
|
|
]
|
|
if not self.includes_sound:
|
|
commands.insert(-1, '-an')
|
|
|
|
combine_process = sp.Popen(commands)
|
|
combine_process.wait()
|
|
|
|
def add_sound_to_video(self) -> None:
|
|
movie_file_path = self.get_movie_file_path()
|
|
stem, ext = os.path.splitext(movie_file_path)
|
|
sound_file_path = stem + ".wav"
|
|
# Makes sure sound file length will match video file
|
|
self.add_audio_segment(AudioSegment.silent(0))
|
|
self.audio_segment.export(
|
|
sound_file_path,
|
|
bitrate='312k',
|
|
)
|
|
temp_file_path = stem + "_temp" + ext
|
|
commands = [
|
|
FFMPEG_BIN,
|
|
"-i", movie_file_path,
|
|
"-i", sound_file_path,
|
|
'-y', # overwrite output file if it exists
|
|
"-c:v", "copy",
|
|
"-c:a", "aac",
|
|
"-b:a", "320k",
|
|
# select video stream from first file
|
|
"-map", "0:v:0",
|
|
# select audio stream from second file
|
|
"-map", "1:a:0",
|
|
'-loglevel', 'error',
|
|
# "-shortest",
|
|
temp_file_path,
|
|
]
|
|
sp.call(commands)
|
|
shutil.move(temp_file_path, movie_file_path)
|
|
os.remove(sound_file_path)
|
|
|
|
def save_final_image(self, image: Image) -> None:
|
|
file_path = self.get_image_file_path()
|
|
image.save(file_path)
|
|
self.print_file_ready_message(file_path)
|
|
|
|
def print_file_ready_message(self, file_path: str) -> None:
|
|
if not self.quiet:
|
|
log.info(f"File ready at {file_path}")
|
|
|
|
def should_open_file(self) -> bool:
|
|
return any([
|
|
self.show_file_location_upon_completion,
|
|
self.open_file_upon_completion,
|
|
])
|
|
|
|
def open_file(self) -> None:
|
|
if self.quiet:
|
|
curr_stdout = sys.stdout
|
|
sys.stdout = open(os.devnull, "w")
|
|
|
|
current_os = platform.system()
|
|
file_paths = []
|
|
|
|
if self.save_last_frame:
|
|
file_paths.append(self.get_image_file_path())
|
|
if self.write_to_movie:
|
|
file_paths.append(self.get_movie_file_path())
|
|
|
|
for file_path in file_paths:
|
|
if current_os == "Windows":
|
|
os.startfile(file_path)
|
|
else:
|
|
commands = []
|
|
if current_os == "Linux":
|
|
commands.append("xdg-open")
|
|
elif current_os.startswith("CYGWIN"):
|
|
commands.append("cygstart")
|
|
else: # Assume macOS
|
|
commands.append("open")
|
|
|
|
if self.show_file_location_upon_completion:
|
|
commands.append("-R")
|
|
|
|
commands.append(file_path)
|
|
|
|
FNULL = open(os.devnull, 'w')
|
|
sp.call(commands, stdout=FNULL, stderr=sp.STDOUT)
|
|
FNULL.close()
|
|
|
|
if self.quiet:
|
|
sys.stdout.close()
|
|
sys.stdout = curr_stdout
|