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mirror of https://github.com/ytdl-org/youtube-dl.git synced 2024-12-23 08:26:50 +00:00

Implement format selection in YoutubeDL

Now the IEs can set a formats field in the info_dict, with the formats ordered from worst to best quality. It's a list of dicts with the following fields:
* Mandatory: url and ext
* Optional: format and format_id

The format_id is used for choosing which formats have to be downloaded.

Now a video result is processed by the method process_video_result.
This commit is contained in:
Jaime Marquínez Ferrándiz 2013-07-02 10:08:58 +02:00
parent 3823342d9d
commit dd82ffea0c
2 changed files with 74 additions and 8 deletions

View File

@ -385,13 +385,7 @@ class YoutubeDL(object):
result_type = ie_result.get('_type', 'video') # If not given we suppose it's a video, support the default old system
if result_type == 'video':
ie_result.update(extra_info)
if 'playlist' not in ie_result:
# It isn't part of a playlist
ie_result['playlist'] = None
ie_result['playlist_index'] = None
if download:
self.process_info(ie_result)
return ie_result
return self.process_video_result(ie_result)
elif result_type == 'url':
# We have to add extra_info to the results because it may be
# contained in a playlist
@ -449,6 +443,64 @@ class YoutubeDL(object):
else:
raise Exception('Invalid result type: %s' % result_type)
def process_video_result(self, info_dict, download=True):
assert info_dict.get('_type', 'video') == 'video'
if 'playlist' not in info_dict:
# It isn't part of a playlist
info_dict['playlist'] = None
info_dict['playlist_index'] = None
# We now pick which formats have to be downloaded
if info_dict.get('formats') is None:
# There's only one format available
formats = [info_dict]
else:
formats = info_dict['formats']
# We check that all the formats have the format and format_id fields
for (i, format) in enumerate(formats):
if format.get('format') is None:
format['format'] = compat_str(i)
if format.get('format_id') is None:
format['format_id'] = compat_str(i)
if self.params.get('listformats', None):
self.list_formats(info_dict)
return
req_format = self.params.get('format', 'best')
formats_to_download = []
if req_format == 'best' or req_format is None:
formats_to_download = [formats[-1]]
elif req_format == 'worst':
formats_to_download = [formats[0]]
# The -1 is for supporting YoutubeIE
elif req_format in ('-1', 'all'):
formats_to_download = formats
else:
# We can accept formats requestd in the format: 34/10/5, we pick
# the first that is availble, starting from left
req_formats = req_format.split('/')
for rf in req_formats:
matches = filter(lambda f:f['format_id'] == rf ,formats)
if matches:
formats_to_download = [matches[0]]
break
if not formats_to_download:
raise ExtractorError(u'requested format not available')
if download:
if len(formats_to_download) > 1:
self.to_screen(u'[info] %s: downloading video in %s formats' % (info_dict['id'], len(formats_to_download)))
for format in formats_to_download:
new_info = dict(info_dict)
new_info.update(format)
self.process_info(new_info)
# We update the info dict with the best quality format (backwards compatibility)
info_dict.update(formats_to_download[-1])
return info_dict
def process_info(self, info_dict):
"""Process a single resolved IE result."""
@ -655,3 +707,17 @@ class YoutubeDL(object):
vid_id = info_dict['extractor'] + u' ' + info_dict['id']
with locked_file(fn, 'a', encoding='utf-8') as archive_file:
archive_file.write(vid_id + u'\n')
def list_formats(self, info_dict):
formats_s = []
for format in info_dict.get('formats', [info_dict]):
formats_s.append("%s\t:\t%s\t[%s]" % (format['format_id'],
format['ext'],
format.get('format', '???'),
)
)
if len(formats_s) != 1:
formats_s[0] += ' (worst)'
formats_s[-1] += ' (best)'
formats_s = "\n".join(formats_s)
self.to_screen(u"[info] Available formats for %s:\nformat code\textension\n%s" % (info_dict['id'], formats_s))

View File

@ -208,7 +208,7 @@ def parseOpts(overrideArguments=None):
video_format.add_option('-f', '--format',
action='store', dest='format', metavar='FORMAT',
action='store', dest='format', metavar='FORMAT', default='best',
help='video format code, specifiy the order of preference using slashes: "-f 22/17/18". "-f mp4" and "-f flv" are also supported')
video_format.add_option('--all-formats',
action='store_const', dest='format', help='download all available video formats', const='all')