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[EmbedMetadata] Allow overwriting all default metadata

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with `meta_default` key
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pukkandan 2021-10-18 09:19:25 +05:30
parent 24b0a72b30
commit b11d210156
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2 changed files with 11 additions and 12 deletions
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2
README.md
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@ -1433,7 +1433,7 @@ Note that any field created by this can be used in the [output template](#output
This option also has a few special uses:
* You can download an additional URL based on the metadata of the currently downloaded video. To do this, set the field `additional_urls` to the URL that you want to download. Eg: `--parse-metadata "description:(?P<additional_urls>https?://www\.vimeo\.com/\d+)` will download the first vimeo video found in the description
* You can use this to change the metadata that is embedded in the media file. To do this, set the value of the corresponding field with a `meta_` prefix. For example, any value you set to `meta_description` field will be added to the `description` field in the file. For example, you can use this to set a different "description" and "synopsis"
* You can use this to change the metadata that is embedded in the media file. To do this, set the value of the corresponding field with a `meta_` prefix. For example, any value you set to `meta_description` field will be added to the `description` field in the file. For example, you can use this to set a different "description" and "synopsis". Any value set to the `meta_` field will overwrite all default values.
For reference, these are the fields yt-dlp adds by default to the file metadata:

21
yt_dlp/postprocessor/ffmpeg.py
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@ -10,7 +10,7 @@ import json
from .common import AudioConversionError, PostProcessor
from ..compat import compat_str, compat_numeric_types
from ..compat import compat_str
from ..utils import (
dfxp2srt,
encodeArgument,
@ -664,15 +664,14 @@ class FFmpegMetadataPP(FFmpegPostProcessor):
def _get_metadata_opts(self, info):
metadata = {}
meta_prefix = 'meta_'
def add(meta_list, info_list=None):
if not meta_list:
return
for info_f in variadic(info_list or meta_list):
if isinstance(info.get(info_f), (compat_str, compat_numeric_types)):
for meta_f in variadic(meta_list):
metadata[meta_f] = info[info_f]
break
value = next((
str(info[key]) for key in [meta_prefix] + list(variadic(info_list or meta_list))
if info.get(key) is not None), None)
if value not in ('', None):
metadata.update({meta_f: value for meta_f in variadic(meta_list)})
# See [1-4] for some info on media metadata/metadata supported
# by ffmpeg.
@ -695,9 +694,9 @@ class FFmpegMetadataPP(FFmpegPostProcessor):
add('episode_id', ('episode', 'episode_id'))
add('episode_sort', 'episode_number')
prefix = 'meta_'
for key in filter(lambda k: k.startswith(prefix), info.keys()):
add(key[len(prefix):], key)
for key, value in info.items():
if value is not None and key != meta_prefix and key.startswith(meta_prefix):
metadata[key[len(meta_prefix):]] = value
for name, value in metadata.items():
yield ('-metadata', f'{name}={value}')