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bazarr/libs/pyprobe/pyprobe.py

227 lines
6.7 KiB

from __future__ import absolute_import
from six import PY3
import json
import subprocess
from os import path
from sys import getfilesystemencoding
from . import ffprobeparsers
class VideoFileParser:
def __init__(
self,
ffprobe="ffprobe",
includeMissing=True,
rawMode=False,
):
self._ffprobe = ffprobe
self._includeMissing = includeMissing
self._rawMode = rawMode
########################################
# Main Method
def parseFfprobe(self, inputFile):
"""Takes an input file and returns the parsed data using ffprobe.
Args:
inputFile (str): Video file path
Returns:
dict<str, dict<str, var>>: Parsed video info
Raises:
FileNotFoundError: The input video file or input executable was not found
IOError: Execution failed
"""
if not path.isfile(inputFile):
raise FileNotFoundError(inputFile + " not found")
self._checkExecutable(self._ffprobe)
fdict = self._executeFfprobe(inputFile)
return self._parseFfprobe(fdict, inputFile)
########################################
# ffprobe Parsing
def _executeFfprobe(self, inputFile):
"""Executes ffprobe program on input file to get raw info
fdict = dict<str, fdict> or dict<str, str>
Args:
inputFile (str): Video file path
Returns:
fdict: Parsed data
"""
commandArgs = [
"-v",
"quiet",
"-hide_banner",
"-show_error",
"-show_format",
"-show_streams",
"-show_programs",
"-show_chapters",
"-show_private_data",
"-print_format",
"json",
]
outputJson = self._executeParser(self._ffprobe, commandArgs, inputFile)
try:
data = json.loads(outputJson)
except json.JSONDecodeError:
raise IOError("Could not decode ffprobe output for file " + inputFile)
return data
def _parseFfprobe(self, fOutput, inputFile):
"""Parse all data from fOutput to organized format
fdict = dict<str, fdict> or dict<str, str>
Args:
fOutput (fdict): Stream data from ffprobe
inputFile (str): Video file path
Returns:
dict<str, dict<str, str>>: Parsed video data
"""
videoInfo = {}
videoInfo["path"] = path.abspath(inputFile)
videoInfo.update(
ffprobeparsers.RootParser.parse(
fOutput["format"], self._rawMode, self._includeMissing
)
)
videoInfo.update(self._parseFfprobeStreams(fOutput))
videoInfo.update(self._parseFfprobeChapters(fOutput))
if not self._rawMode:
ffprobeparsers.ChapterParser.fillEmptyTitles(videoInfo["chapters"])
return videoInfo
def _parseFfprobeStreams(self, fOutput):
"""Parses video, audio, and subtitle streams
fdict = dict<str, fdict> or dict<str, str>
Args:
streams_data (fdict): Stream data from ffprobe
Returns:
dict<str, dict<str, var>>: Parsed streams - video, audio, and subtitle
"""
parsedInfo = {"videos": [], "audios": [], "subtitles": []}
for stream in fOutput["streams"]:
streamType = stream["codec_type"]
data = None
if streamType == "video":
data = ffprobeparsers.VideoStreamParser.parse(
stream, self._rawMode, self._includeMissing
)
parsedInfo["videos"].append(data)
elif streamType == "audio":
data = ffprobeparsers.AudioStreamParser.parse(
stream, self._rawMode, self._includeMissing
)
parsedInfo["audios"].append(data)
elif streamType == "subtitle":
data = ffprobeparsers.SubtitleStreamParser.parse(
stream, self._rawMode, self._includeMissing
)
parsedInfo["subtitles"].append(data)
return parsedInfo
def _parseFfprobeChapters(self, fOutput):
"""Parses chapters
fdict = dict<str, fdict> or dict<str, str>
Args:
chapters_data (fdict): Stream data from ffprobe
Returns:
dict<str, dict<str, var>>: Parsed chapters
"""
parsedInfo = {"chapters": []}
if fOutput["chapters"] is None:
return parsedInfo
for chapter in fOutput["chapters"]:
parsedInfo["chapters"].append(
ffprobeparsers.ChapterParser.parse(
chapter, self._rawMode, self._includeMissing
)
)
return parsedInfo
########################################
# Misc Methods
@staticmethod
def _executeParser(parser, commandArgs, inputFile):
"""Executes parser on the input file
Args:
parser (str): Executable location or command
commandArgs (list of strings): Extra command arguments
inputFile (str): the input file location
Raises:
IOError: ffprobe execution failed
"""
if PY3:
command = [parser] + commandArgs + [inputFile]
completedProcess = subprocess.run(
command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True, encoding="utf-8"
)
if completedProcess.returncode:
raise IOError(
"Error occurred during execution - " + completedProcess.stderr
)
return completedProcess.stdout
else:
command = [parser] + commandArgs + [inputFile.encode(getfilesystemencoding())]
try:
completedProcess = subprocess.check_output(
command, stderr=subprocess.STDOUT
)
except subprocess.CalledProcessError as e:
raise IOError(
"Error occurred during execution - " + e.output
)
return completedProcess
@staticmethod
def _checkExecutable(executable):
"""Checks if target is executable
Args:
executable (str): Executable location, can be file or command
Raises:
FileNotFoundError: Executable was not found
"""
try:
subprocess.check_output(
[executable, "--help"],
stderr=subprocess.STDOUT
)
except OSError:
raise FileNotFoundError(executable + " not found")
class FileNotFoundError(Exception):
pass
class IOError(Exception):
pass