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Use relative paths for DASH fragments (closes #12990)

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10x reduced JSON size
refs #13810
This commit is contained in:
Sergey M․ 2017-08-05 06:57:19 +07:00
parent 8519b88f67
commit 1141e9104b
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GPG key ID: 2C393E0F18A9236D
2 changed files with 20 additions and 10 deletions
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14
youtube_dl/downloader/dash.py
View file

@ -2,6 +2,7 @@
from .fragment import FragmentFD from .fragment import FragmentFD
from ..compat import compat_urllib_error from ..compat import compat_urllib_error
from ..utils import urljoin
class DashSegmentsFD(FragmentFD): class DashSegmentsFD(FragmentFD):
@ -12,12 +13,13 @@ class DashSegmentsFD(FragmentFD):
FD_NAME = 'dashsegments' FD_NAME = 'dashsegments'
def real_download(self, filename, info_dict): def real_download(self, filename, info_dict):
segments = info_dict['fragments'][:1] if self.params.get( fragment_base_url = info_dict.get('fragment_base_url')
fragments = info_dict['fragments'][:1] if self.params.get(
'test', False) else info_dict['fragments'] 'test', False) else info_dict['fragments']
ctx = { ctx = {
'filename': filename, 'filename': filename,
'total_frags': len(segments), 'total_frags': len(fragments),
} }
self._prepare_and_start_frag_download(ctx) self._prepare_and_start_frag_download(ctx)
@ -26,7 +28,7 @@ def real_download(self, filename, info_dict):
skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True) skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
frag_index = 0 frag_index = 0
for i, segment in enumerate(segments): for i, fragment in enumerate(fragments):
frag_index += 1 frag_index += 1
if frag_index <= ctx['fragment_index']: if frag_index <= ctx['fragment_index']:
continue continue
@ -36,7 +38,11 @@ def real_download(self, filename, info_dict):
count = 0 count = 0
while count <= fragment_retries: while count <= fragment_retries:
try: try:
success, frag_content = self._download_fragment(ctx, segment['url'], info_dict) fragment_url = fragment.get('url')
if not fragment_url:
assert fragment_base_url
fragment_url = urljoin(fragment_base_url, fragment['path'])
success, frag_content = self._download_fragment(ctx, fragment_url, info_dict)
if not success: if not success:
return False return False
self._append_fragment(ctx, frag_content) self._append_fragment(ctx, frag_content)

16
youtube_dl/extractor/common.py
View file

@ -1892,9 +1892,13 @@ def prepare_template(template_name, identifiers):
'Bandwidth': bandwidth, 'Bandwidth': bandwidth,
} }
def location_key(location):
return 'url' if re.match(r'^https?://', location) else 'path'
if 'segment_urls' not in representation_ms_info and 'media' in representation_ms_info: if 'segment_urls' not in representation_ms_info and 'media' in representation_ms_info:
media_template = prepare_template('media', ('Number', 'Bandwidth', 'Time')) media_template = prepare_template('media', ('Number', 'Bandwidth', 'Time'))
media_location_key = location_key(media_template)
# As per [1, 5.3.9.4.4, Table 16, page 55] $Number$ and $Time$ # As per [1, 5.3.9.4.4, Table 16, page 55] $Number$ and $Time$
# can't be used at the same time # can't be used at the same time
@ -1904,7 +1908,7 @@ def prepare_template(template_name, identifiers):
segment_duration = float_or_none(representation_ms_info['segment_duration'], representation_ms_info['timescale']) segment_duration = float_or_none(representation_ms_info['segment_duration'], representation_ms_info['timescale'])
representation_ms_info['total_number'] = int(math.ceil(float(period_duration) / segment_duration)) representation_ms_info['total_number'] = int(math.ceil(float(period_duration) / segment_duration))
representation_ms_info['fragments'] = [{ representation_ms_info['fragments'] = [{
'url': media_template % { media_location_key: media_template % {
'Number': segment_number, 'Number': segment_number,
'Bandwidth': bandwidth, 'Bandwidth': bandwidth,
}, },
@ -1928,7 +1932,7 @@ def add_segment_url():
'Number': segment_number, 'Number': segment_number,
} }
representation_ms_info['fragments'].append({ representation_ms_info['fragments'].append({
'url': segment_url, media_location_key: segment_url,
'duration': float_or_none(segment_d, representation_ms_info['timescale']), 'duration': float_or_none(segment_d, representation_ms_info['timescale']),
}) })
@ -1952,8 +1956,9 @@ def add_segment_url():
for s in representation_ms_info['s']: for s in representation_ms_info['s']:
duration = float_or_none(s['d'], timescale) duration = float_or_none(s['d'], timescale)
for r in range(s.get('r', 0) + 1): for r in range(s.get('r', 0) + 1):
segment_uri = representation_ms_info['segment_urls'][segment_index]
fragments.append({ fragments.append({
'url': representation_ms_info['segment_urls'][segment_index], location_key(segment_uri): segment_uri,
'duration': duration, 'duration': duration,
}) })
segment_index += 1 segment_index += 1
@ -1962,6 +1967,7 @@ def add_segment_url():
# No fragments key is present in this case. # No fragments key is present in this case.
if 'fragments' in representation_ms_info: if 'fragments' in representation_ms_info:
f.update({ f.update({
'fragment_base_url': base_url,
'fragments': [], 'fragments': [],
'protocol': 'http_dash_segments', 'protocol': 'http_dash_segments',
}) })
@ -1969,10 +1975,8 @@ def add_segment_url():
initialization_url = representation_ms_info['initialization_url'] initialization_url = representation_ms_info['initialization_url']
if not f.get('url'): if not f.get('url'):
f['url'] = initialization_url f['url'] = initialization_url
f['fragments'].append({'url': initialization_url}) f['fragments'].append({location_key(initialization_url): initialization_url})
f['fragments'].extend(representation_ms_info['fragments']) f['fragments'].extend(representation_ms_info['fragments'])
for fragment in f['fragments']:
fragment['url'] = urljoin(base_url, fragment['url'])
try: try:
existing_format = next( existing_format = next(
fo for fo in formats fo for fo in formats