Improve output template (see desc)
* Objects can be traversed like `%(field.key1.key2)s` * A number can be added to the field as `%(field+n)s` * Deprecates `--autonumber-start`
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pukkandan
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README.md
19
README.md
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@ -395,8 +395,6 @@ Then simply run `make`. You can also run `make yt-dlp` instead to compile only t
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--output-na-placeholder TEXT Placeholder value for unavailable meta
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fields in output filename template
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(default: "NA")
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--autonumber-start NUMBER Specify the start value for %(autonumber)s
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(default is 1)
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--restrict-filenames Restrict filenames to only ASCII
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characters, and avoid "&" and spaces in
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filenames
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@ -833,7 +831,19 @@ The `-o` option is used to indicate a template for the output file names while `
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**tl;dr:** [navigate me to examples](#output-template-examples).
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The basic usage of `-o` is not to set any template arguments when downloading a single file, like in `yt-dlp -o funny_video.flv "https://some/video"` (hard-coding file extension like this is not recommended). However, it may contain special sequences that will be replaced when downloading each video. The special sequences may be formatted according to [python string formatting operations](https://docs.python.org/2/library/stdtypes.html#string-formatting). For example, `%(NAME)s` or `%(NAME)05d`. To clarify, that is a percent symbol followed by a name in parentheses, followed by formatting operations. Date/time fields can also be formatted according to [strftime formatting](https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes) by specifying it inside the parantheses separated from the field name using a `>`. For example, `%(duration>%H-%M-%S)s`.
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The simplest usage of `-o` is not to set any template arguments when downloading a single file, like in `yt-dlp -o funny_video.flv "https://some/video"` (hard-coding file extension like this is _not_ recommended and could break certain postprocessing).
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It may however also contain special sequences that will be replaced when downloading each video. The special sequences may be formatted according to [python string formatting operations](https://docs.python.org/2/library/stdtypes.html#string-formatting). For example, `%(NAME)s` or `%(NAME)05d`. To clarify, that is a percent symbol followed by a name in parentheses, followed by formatting operations.
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The field names themselves (the part inside the parenthesis) can also have some special formatting:
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1. **Date/time Formatting**: Date/time fields can be formatted according to [strftime formatting](https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes) by specifying it separated from the field name using a `>`. Eg: `%(duration>%H-%M-%S)s` or `%(upload_date>%Y-%m-%d)s`
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2. **Offset numbers**: Numeric fields can have an initial offset specified by using a `+` seperator. Eg: `%(playlist_index+10)03d`. This can also be used in conjunction with the datetime formatting. Eg: `%(epoch+-3600>%H-%M-%S)s`
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3. **Object traversal**: The dictionaries and lists available in metadata can be traversed by using a `.` (dot) seperator. Eg: `%(tags.0)s` or `%(subtitles.en.-1.ext)`. Note that the fields that become available using this method are not listed below. Use `-j` to see such fields
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To summarize, the general syntax for a field is:
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```
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%(name[.keys][+offset][>strf])[flags][width][.precision][length]type
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```
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Additionally, you can set different output templates for the various metadata files separately from the general output template by specifying the type of file followed by the template separated by a colon `:`. The different filetypes supported are `subtitle`, `thumbnail`, `description`, `annotation`, `infojson`, `pl_description`, `pl_infojson`, `chapter`. For example, `-o '%(title)s.%(ext)s' -o 'thumbnail:%(title)s\%(title)s.%(ext)s'` will put the thumbnails in a folder with the same name as the video.
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@ -992,7 +1002,7 @@ The general syntax for format selection is `-f FORMAT` (or `--format FORMAT`) wh
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**tl;dr:** [navigate me to examples](#format-selection-examples).
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The simplest case is requesting a specific format, for example with `-f 22` you can download the format with format code equal to 22. You can get the list of available format codes for particular video using `--list-formats` or `-F`. Note that these format codes are extractor specific.
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The simplest case is requesting a specific format, for example with `-f 22` you can download the format with format code equal to 22. You can get the list of available format codes for particular video using `--list-formats` or `-F`. Note that these format codes are extractor specific.
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You can also use a file extension (currently `3gp`, `aac`, `flv`, `m4a`, `mp3`, `mp4`, `ogg`, `wav`, `webm` are supported) to download the best quality format of a particular file extension served as a single file, e.g. `-f webm` will download the best quality format with the `webm` extension served as a single file.
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@ -1263,6 +1273,7 @@ These are all the deprecated options and the current alternative to achieve the
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--all-formats -f all
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--all-subs --sub-langs all --write-subs
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--autonumber-size NUMBER Use string formatting. Eg: %(autonumber)03d
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--autonumber-start NUMBER Use internal field formatting like %(autonumber+NUMBER)s
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--metadata-from-title FORMAT --parse-metadata "%(title)s:FORMAT"
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--prefer-avconv avconv is no longer officially supported (Alias: --no-prefer-ffmpeg)
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--prefer-ffmpeg Default (Alias: --no-prefer-avconv)
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@ -655,6 +655,8 @@ class TestYoutubeDL(unittest.TestCase):
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'height': 1080,
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'title1': '$PATH',
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'title2': '%PATH%',
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'timestamp': 1618488000,
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'formats': [{'id': 'id1'}, {'id': 'id2'}]
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}
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def fname(templ, na_placeholder='NA'):
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@ -671,6 +673,7 @@ class TestYoutubeDL(unittest.TestCase):
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# Or by provided placeholder
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self.assertEqual(fname(NA_TEST_OUTTMPL, na_placeholder='none'), 'none-none-1234.mp4')
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self.assertEqual(fname(NA_TEST_OUTTMPL, na_placeholder=''), '--1234.mp4')
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self.assertEqual(fname('%(height)s.%(ext)s'), '1080.mp4')
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self.assertEqual(fname('%(height)d.%(ext)s'), '1080.mp4')
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self.assertEqual(fname('%(height)6d.%(ext)s'), ' 1080.mp4')
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self.assertEqual(fname('%(height)-6d.%(ext)s'), '1080 .mp4')
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@ -688,6 +691,12 @@ class TestYoutubeDL(unittest.TestCase):
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self.assertEqual(fname('%%(width)06d.%(ext)s'), '%(width)06d.mp4')
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self.assertEqual(fname('Hello %(title1)s'), 'Hello $PATH')
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self.assertEqual(fname('Hello %(title2)s'), 'Hello %PATH%')
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self.assertEqual(fname('%(timestamp+-1000>%H-%M-%S)s'), '11-43-20')
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self.assertEqual(fname('%(id+1)05d'), '01235')
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self.assertEqual(fname('%(width+100)05d'), 'NA')
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self.assertEqual(fname('%(formats.0)s').replace("u", ""), "{'id' - 'id1'}")
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self.assertEqual(fname('%(formats.-1.id)s'), 'id2')
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self.assertEqual(fname('%(formats.2)s'), 'NA')
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def test_format_note(self):
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ydl = YoutubeDL()
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@ -99,6 +99,7 @@ from .utils import (
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strftime_or_none,
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subtitles_filename,
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to_high_limit_path,
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traverse_dict,
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UnavailableVideoError,
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url_basename,
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version_tuple,
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@ -796,6 +797,7 @@ class YoutubeDL(object):
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def prepare_outtmpl(self, outtmpl, info_dict, sanitize=None):
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""" Make the template and info_dict suitable for substitution (outtmpl % info_dict)"""
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template_dict = dict(info_dict)
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na = self.params.get('outtmpl_na_placeholder', 'NA')
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# duration_string
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template_dict['duration_string'] = ( # %(duration>%H-%M-%S)s is wrong if duration > 24hrs
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@ -821,18 +823,10 @@ class YoutubeDL(object):
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elif template_dict.get('width'):
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template_dict['resolution'] = '%dx?' % template_dict['width']
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if sanitize is None:
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sanitize = lambda k, v: v
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template_dict = dict((k, v if isinstance(v, compat_numeric_types) else sanitize(k, v))
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for k, v in template_dict.items()
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if v is not None and not isinstance(v, (list, tuple, dict)))
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na = self.params.get('outtmpl_na_placeholder', 'NA')
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template_dict = collections.defaultdict(lambda: na, template_dict)
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# For fields playlist_index and autonumber convert all occurrences
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# of %(field)s to %(field)0Nd for backward compatibility
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field_size_compat_map = {
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'playlist_index': len(str(template_dict['n_entries'])),
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'playlist_index': len(str(template_dict.get('n_entries', na))),
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'autonumber': autonumber_size,
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}
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FIELD_SIZE_COMPAT_RE = r'(?<!%)%\((?P<field>autonumber|playlist_index)\)s'
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@ -844,32 +838,51 @@ class YoutubeDL(object):
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outtmpl)
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numeric_fields = list(self._NUMERIC_FIELDS)
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if sanitize is None:
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sanitize = lambda k, v: v
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# Format date
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FORMAT_DATE_RE = FORMAT_RE.format(r'(?P<key>(?P<field>\w+)>(?P<format>.+?))')
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for mobj in re.finditer(FORMAT_DATE_RE, outtmpl):
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conv_type, field, frmt, key = mobj.group('type', 'field', 'format', 'key')
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if key in template_dict:
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continue
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value = strftime_or_none(template_dict.get(field), frmt, na)
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if conv_type in 'crs': # string
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value = sanitize(field, value)
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else: # number
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numeric_fields.append(key)
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value = float_or_none(value, default=None)
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# Internal Formatting = name.key1.key2+number>strf
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INTERNAL_FORMAT_RE = FORMAT_RE.format(
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r'''(?P<final_key>
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(?P<fields>\w+(?:\.[-\w]+)*)
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(?:\+(?P<add>-?\d+(?:\.\d+)?))?
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(?:>(?P<strf_format>.+?))?
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)''')
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for mobj in re.finditer(INTERNAL_FORMAT_RE, outtmpl):
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mobj = mobj.groupdict()
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# Object traversal
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fields = mobj['fields'].split('.')
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final_key = mobj['final_key']
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value = traverse_dict(template_dict, fields)
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# Offset the value
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if mobj['add']:
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value = float_or_none(value)
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if value is not None:
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value = value + float(mobj['add'])
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# Datetime formatting
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if mobj['strf_format']:
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value = strftime_or_none(value, mobj['strf_format'])
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if mobj['type'] in 'crs' and value is not None: # string
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value = sanitize('%{}'.format(mobj['type']) % fields[-1], value)
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else: # numeric
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numeric_fields.append(final_key)
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value = float_or_none(value)
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if value is not None:
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template_dict[key] = value
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template_dict[final_key] = value
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# Missing numeric fields used together with integer presentation types
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# in format specification will break the argument substitution since
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# string NA placeholder is returned for missing fields. We will patch
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# output template for missing fields to meet string presentation type.
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for numeric_field in numeric_fields:
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if numeric_field not in template_dict:
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if template_dict.get(numeric_field) is None:
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outtmpl = re.sub(
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FORMAT_RE.format(re.escape(numeric_field)),
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r'%({0})s'.format(numeric_field), outtmpl)
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template_dict = collections.defaultdict(lambda: na, (
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(k, v if isinstance(v, compat_numeric_types) else sanitize(k, v))
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for k, v in template_dict.items() if v is not None))
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return outtmpl, template_dict
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def _prepare_filename(self, info_dict, tmpl_type='default'):
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@ -908,7 +908,7 @@ def parseOpts(overrideArguments=None):
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filesystem.add_option(
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'--autonumber-start',
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dest='autonumber_start', metavar='NUMBER', default=1, type=int,
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help='Specify the start value for %(autonumber)s (default is %default)')
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help=optparse.SUPPRESS_HELP)
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filesystem.add_option(
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'--restrict-filenames',
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action='store_true', dest='restrictfilenames', default=False,
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@ -6092,11 +6092,20 @@ def load_plugins(name, type, namespace):
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def traverse_dict(dictn, keys, casesense=True):
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if not isinstance(dictn, dict):
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return None
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first_key = keys[0]
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if not casesense:
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dictn = {key.lower(): val for key, val in dictn.items()}
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first_key = first_key.lower()
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value = dictn.get(first_key, None)
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return value if len(keys) < 2 else traverse_dict(value, keys[1:], casesense)
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keys = list(keys)[::-1]
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while keys:
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key = keys.pop()
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if isinstance(dictn, dict):
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if not casesense:
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dictn = {k.lower(): v for k, v in dictn.items()}
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key = key.lower()
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dictn = dictn.get(key)
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elif isinstance(dictn, (list, tuple, compat_str)):
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key, n = int_or_none(key), len(dictn)
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if key is not None and -n <= key < n:
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dictn = dictn[key]
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else:
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dictn = None
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else:
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return None
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return dictn
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