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-rw-r--r--yt_dlp/YoutubeDL.py29
1 files changed, 25 insertions, 4 deletions
diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
index 1643649fb..ad96cebcd 100644
--- a/yt_dlp/YoutubeDL.py
+++ b/yt_dlp/YoutubeDL.py
@@ -813,6 +813,19 @@ class YoutubeDL(object):
'Put from __future__ import unicode_literals at the top of your code file or consider switching to Python 3.x.')
return outtmpl_dict
+ @staticmethod
+ def validate_outtmpl(tmpl):
+ ''' @return None or Exception object '''
+ try:
+ re.sub(
+ STR_FORMAT_RE.format(''),
+ lambda mobj: ('%' if not mobj.group('has_key') else '') + mobj.group(0),
+ tmpl
+ ) % collections.defaultdict(int)
+ return None
+ except ValueError as err:
+ return err
+
def prepare_outtmpl(self, outtmpl, info_dict, sanitize=None):
""" Make the template and info_dict suitable for substitution (outtmpl % info_dict)"""
info_dict = dict(info_dict)
@@ -852,10 +865,12 @@ class YoutubeDL(object):
}
tmpl_dict = {}
+ get_key = lambda k: traverse_obj(
+ info_dict, k.split('.'), is_user_input=True, traverse_string=True)
+
def get_value(mdict):
# Object traversal
- fields = mdict['fields'].split('.')
- value = traverse_obj(info_dict, fields)
+ value = get_key(mdict['fields'])
# Negative
if mdict['negate']:
value = float_or_none(value)
@@ -872,7 +887,7 @@ class YoutubeDL(object):
item, multiplier = (item[1:], -1) if item[0] == '-' else (item, 1)
offset = float_or_none(item)
if offset is None:
- offset = float_or_none(traverse_obj(info_dict, item.split('.')))
+ offset = float_or_none(get_key(item))
try:
value = operator(value, multiplier * offset)
except (TypeError, ZeroDivisionError):
@@ -906,7 +921,13 @@ class YoutubeDL(object):
value = default if value is None else value
key += '\0%s' % fmt
- if fmt[-1] not in 'crs': # numeric
+ if fmt == 'c':
+ value = compat_str(value)
+ if value is None:
+ value, fmt = default, 's'
+ else:
+ value = value[0]
+ elif fmt[-1] not in 'rs': # numeric
value = float_or_none(value)
if value is None:
value, fmt = default, 's'