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Parse metadata from multiple fields

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Closes #196
This commit is contained in:
pukkandan
2021-03-25 03:32:15 +05:30
parent 3700c7ef10
commit 143db31d48
5 changed files with 143 additions and 115 deletions
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39
yt_dlp/postprocessor/metadatafromfield.py
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@ -8,7 +8,7 @@ from ..utils import str_or_none
class MetadataFromFieldPP(PostProcessor):
regex = r'(?P<field>\w+):(?P<format>.+)$'
regex = r'(?P<in>.+):(?P<out>.+)$'
def __init__(self, downloader, formats):
PostProcessor.__init__(self, downloader)
@ -19,11 +19,20 @@ class MetadataFromFieldPP(PostProcessor):
match = re.match(self.regex, f)
assert match is not None
self._data.append({
'field': match.group('field'),
'format': match.group('format'),
'regex': self.format_to_regex(match.group('format'))})
'in': match.group('in'),
'out': match.group('out'),
'tmpl': self.field_to_template(match.group('in')),
'regex': self.format_to_regex(match.group('out')),
})
def format_to_regex(self, fmt):
@staticmethod
def field_to_template(tmpl):
if re.match(r'\w+$', tmpl):
return '%%(%s)s' % tmpl
return tmpl
@staticmethod
def format_to_regex(fmt):
r"""
Converts a string like
'%(title)s - %(artist)s'
@ -37,7 +46,7 @@ class MetadataFromFieldPP(PostProcessor):
# replace %(..)s with regex group and escape other string parts
for match in re.finditer(r'%\((\w+)\)s', fmt):
regex += re.escape(fmt[lastpos:match.start()])
regex += r'(?P<' + match.group(1) + r'>[^\r\n]+)'
regex += r'(?P<%s>[^\r\n]+)' % match.group(1)
lastpos = match.end()
if lastpos < len(fmt):
regex += re.escape(fmt[lastpos:])
@ -45,22 +54,16 @@ class MetadataFromFieldPP(PostProcessor):
def run(self, info):
for dictn in self._data:
field, regex = dictn['field'], dictn['regex']
if field not in info:
self.report_warning('Video doesnot have a %s' % field)
continue
data_to_parse = str_or_none(info[field])
if data_to_parse is None:
self.report_warning('Field %s cannot be parsed' % field)
continue
self.write_debug('Searching for r"%s" in %s' % (regex, field))
match = re.search(regex, data_to_parse)
tmpl, info_copy = self._downloader.prepare_outtmpl(dictn['tmpl'], info)
data_to_parse = tmpl % info_copy
self.write_debug('Searching for r"%s" in %s' % (dictn['regex'], tmpl))
match = re.search(dictn['regex'], data_to_parse)
if match is None:
self.report_warning('Could not interpret video %s as "%s"' % (field, dictn['format']))
self.report_warning('Could not interpret video %s as "%s"' % (dictn['in'], dictn['out']))
continue
for attribute, value in match.groupdict().items():
info[attribute] = value
self.to_screen('parsed %s from %s: %s' % (attribute, field, value if value is not None else 'NA'))
self.to_screen('parsed %s from "%s": %s' % (attribute, dictn['in'], value if value is not None else 'NA'))
return [], info