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import json
import logging
import math
import re
import shlex
import subprocess
from io import BytesIO
from typing import List
from PIL import Image as PILImage
from szurubooru import errors
from szurubooru.func import mime, util
logger = logging.getLogger(__name__)
def convert_heif_to_png(content: bytes) -> bytes:
img = PILImage.open(BytesIO(content))
img_byte_arr = BytesIO()
img.save(img_byte_arr, format="PNG")
return img_byte_arr.getvalue()
class Image:
def __init__(self, content: bytes) -> None:
self.content = content
self._reload_info()
@property
def width(self) -> int:
return self.info["streams"][0]["width"]
@property
def height(self) -> int:
return self.info["streams"][0]["height"]
@property
def frames(self) -> int:
return self.info["streams"][0]["nb_read_frames"]
def resize_fill(self, width: int, height: int) -> None:
width_greater = self.width > self.height
width, height = (-1, height) if width_greater else (width, -1)
cli = [
"-i",
"{path}",
"-f",
"image2",
"-filter:v",
"scale='{width}:{height}'".format(width=width, height=height),
"-map",
"0:v:0",
"-vframes",
"1",
"-vcodec",
"png",
"-",
]
if (
"duration" in self.info["format"]
and self.info["format"]["format_name"] != "swf"
):
duration = float(self.info["format"]["duration"])
if duration > 3:
cli = [
"-ss",
"%d" % math.floor(duration * 0.3),
] + cli
content = self._execute(cli, ignore_error_if_data=True)
if not content:
raise errors.ProcessingError("Error while resizing image.")
self.content = content
self._reload_info()
def to_png(self) -> bytes:
return self._execute(
[
"-i",
"{path}",
"-f",
"image2",
"-map",
"0:v:0",
"-vframes",
"1",
"-vcodec",
"png",
"-",
]
)
def to_jpeg(self) -> bytes:
return self._execute(
[
"-f",
"lavfi",
"-i",
"color=white:s=%dx%d" % (self.width, self.height),
"-i",
"{path}",
"-f",
"image2",
"-filter_complex",
"overlay",
"-map",
"0:v:0",
"-vframes",
"1",
"-vcodec",
"mjpeg",
"-",
]
)
def to_webm(self) -> bytes:
with util.create_temp_file_path(suffix=".log") as phase_log_path:
# Pass 1
self._execute(
[
"-i",
"{path}",
"-pass",
"1",
"-passlogfile",
phase_log_path,
"-vcodec",
"libvpx-vp9",
"-crf",
"4",
"-b:v",
"2500K",
"-acodec",
"libvorbis",
"-f",
"webm",
"-y",
"/dev/null",
]
)
# Pass 2
return self._execute(
[
"-i",
"{path}",
"-pass",
"2",
"-passlogfile",
phase_log_path,
"-vcodec",
"libvpx-vp9",
"-crf",
"4",
"-b:v",
"2500K",
"-acodec",
"libvorbis",
"-f",
"webm",
"-",
]
)
def to_mp4(self) -> bytes:
with util.create_temp_file_path(suffix=".dat") as mp4_temp_path:
width = self.width
height = self.height
altered_dimensions = False
if self.width % 2 != 0:
width = self.width - 1
altered_dimensions = True
if self.height % 2 != 0:
height = self.height - 1
altered_dimensions = True
args = [
"-i",
"{path}",
"-vcodec",
"libx264",
"-preset",
"slow",
"-crf",
"22",
"-b:v",
"200K",
"-profile:v",
"main",
"-pix_fmt",
"yuv420p",
"-acodec",
"aac",
"-f",
"mp4",
]
if altered_dimensions:
args += ["-filter:v", "scale='%d:%d'" % (width, height)]
self._execute(args + ["-y", mp4_temp_path])
with open(mp4_temp_path, "rb") as mp4_temp:
return mp4_temp.read()
def check_for_sound(self) -> bool:
audioinfo = json.loads(
self._execute(
[
"-i",
"{path}",
"-of",
"json",
"-select_streams",
"a",
"-show_streams",
],
program="ffprobe",
).decode("utf-8")
)
assert "streams" in audioinfo
if len(audioinfo["streams"]) < 1:
return False
log = self._execute(
[
"-hide_banner",
"-progress",
"-",
"-i",
"{path}",
"-af",
"volumedetect",
"-max_muxing_queue_size",
"99999",
"-vn",
"-sn",
"-f",
"null",
"-y",
"/dev/null",
],
get_logs=True,
).decode("utf-8", errors="replace")
log_match = re.search(r".*volumedetect.*mean_volume: (.*) dB", log)
if not log_match or not log_match.groups():
raise errors.ProcessingError(
"A problem occured when trying to check for audio"
)
meanvol = float(log_match.groups()[0])
# -91.0 dB is the minimum for 16-bit audio, assume sound if > -80.0 dB
return meanvol > -80.0
def _execute(
self,
cli: List[str],
program: str = "ffmpeg",
ignore_error_if_data: bool = False,
get_logs: bool = False,
) -> bytes:
mime_type = mime.get_mime_type(self.content)
if mime.is_heif(mime_type):
# FFmpeg does not support HEIF.
# https://trac.ffmpeg.org/ticket/6521
self.content = convert_heif_to_png(self.content)
extension = mime.get_extension(mime_type)
assert extension
with util.create_temp_file(suffix="." + extension) as handle:
handle.write(self.content)
handle.flush()
cli = [program, "-loglevel", "32" if get_logs else "24"] + cli
cli = [part.format(path=handle.name) for part in cli]
proc = subprocess.Popen(
cli,
stdout=subprocess.PIPE,
stdin=subprocess.DEVNULL,
stderr=subprocess.PIPE,
)
out, err = proc.communicate()
if proc.returncode != 0:
logger.warning(
"Failed to execute ffmpeg command (cli=%r, err=%r)",
" ".join(shlex.quote(arg) for arg in cli),
err,
)
if (len(out) > 0 and not ignore_error_if_data) or len(
out
) == 0:
raise errors.ProcessingError(
"Error while processing image.\n" + err.decode("utf-8")
)
return err if get_logs else out
def _reload_info(self) -> None:
self.info = json.loads(
self._execute(
[
"-i",
"{path}",
"-of",
"json",
"-select_streams",
"v",
"-show_format",
"-show_streams",
],
program="ffprobe",
).decode("utf-8")
)
assert "format" in self.info
assert "streams" in self.info
if len(self.info["streams"]) < 1:
logger.warning("The video contains no video streams.")
raise errors.ProcessingError(
"The video contains no video streams."
)
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