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from __future__ import unicode_literals
from ..downloader import get_suitable_downloader
from .fragment import FragmentFD
from ..utils import urljoin
class DashSegmentsFD(FragmentFD):
"""
Download segments in a DASH manifest. External downloaders can take over
the fragment downloads by supporting the 'dash_frag_urls' protocol
"""
FD_NAME = 'dashsegments'
def real_download(self, filename, info_dict):
if info_dict.get('is_live'):
self.report_error('Live DASH videos are not supported')
fragment_base_url = info_dict.get('fragment_base_url')
fragments = info_dict['fragments'][:1] if self.params.get(
'test', False) else info_dict['fragments']
real_downloader = get_suitable_downloader(
info_dict, self.params, None, protocol='dash_frag_urls', to_stdout=(filename == '-'))
ctx = {
'filename': filename,
'total_frags': len(fragments),
}
if real_downloader:
self._prepare_external_frag_download(ctx)
else:
self._prepare_and_start_frag_download(ctx, info_dict)
fragments_to_download = []
frag_index = 0
for i, fragment in enumerate(fragments):
frag_index += 1
if frag_index <= ctx['fragment_index']:
continue
fragment_url = fragment.get('url')
if not fragment_url:
assert fragment_base_url
fragment_url = urljoin(fragment_base_url, fragment['path'])
fragments_to_download.append({
'frag_index': frag_index,
'index': i,
'url': fragment_url,
})
if real_downloader:
self.to_screen(
'[%s] Fragment downloads will be delegated to %s' % (self.FD_NAME, real_downloader.get_basename()))
info_dict['fragments'] = fragments_to_download
fd = real_downloader(self.ydl, self.params)
return fd.real_download(filename, info_dict)
return self.download_and_append_fragments(ctx, fragments_to_download, info_dict)
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