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.PIPE, stderr=subprocess.PIPE, ) out, err = proc.communicate(input=self.content) 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." )