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[downloader/dash] Abort if the first segment fails

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Closes #10497, Closes #10542
This commit is contained in:
Yen Chi Hsuan 2016-09-03 23:00:52 +08:00
parent b29cd56591
commit 919cf1a62f
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GPG Key ID: 3FDDD575826C5C30
2 changed files with 17 additions and 7 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
version <unreleased> version <unreleased>
Core
* If the first segment of DASH fails, abort the whole download process to
prevent throttling (#10497)
Extractors Extractors
* [pornvoisines] Fix extraction (#10469) * [pornvoisines] Fix extraction (#10469)
* [rottentomatoes] Fix extraction (#10467) * [rottentomatoes] Fix extraction (#10467)

20
youtube_dl/downloader/dash.py
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@ -40,7 +40,8 @@ def combine_url(base_url, target_url):
fragment_retries = self.params.get('fragment_retries', 0) fragment_retries = self.params.get('fragment_retries', 0)
skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True) skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
def append_url_to_file(target_url, tmp_filename, segment_name): def process_segment(segment, tmp_filename, fatal):
target_url, segment_name = segment
target_filename = '%s-%s' % (tmp_filename, segment_name) target_filename = '%s-%s' % (tmp_filename, segment_name)
count = 0 count = 0
while count <= fragment_retries: while count <= fragment_retries:
@ -64,18 +65,23 @@ def append_url_to_file(target_url, tmp_filename, segment_name):
if count <= fragment_retries: if count <= fragment_retries:
self.report_retry_fragment(err, segment_name, count, fragment_retries) self.report_retry_fragment(err, segment_name, count, fragment_retries)
if count > fragment_retries: if count > fragment_retries:
if skip_unavailable_fragments: if not fatal:
self.report_skip_fragment(segment_name) self.report_skip_fragment(segment_name)
return True return True
self.report_error('giving up after %s fragment retries' % fragment_retries) self.report_error('giving up after %s fragment retries' % fragment_retries)
return False return False
return True return True
if initialization_url: segments_to_download = [(initialization_url, 'Init')] if initialization_url else []
if not append_url_to_file(initialization_url, ctx['tmpfilename'], 'Init'): segments_to_download.extend([
return False (segment_url, 'Seg%d' % i)
for i, segment_url in enumerate(segment_urls): for i, segment_url in enumerate(segment_urls)])
if not append_url_to_file(segment_url, ctx['tmpfilename'], 'Seg%d' % i):
for i, segment in enumerate(segments_to_download):
# In DASH, the first segment contains necessary headers to
# generate a valid MP4 file, so always abort for the first segment
fatal = i == 0 or not skip_unavailable_fragments
if not process_segment(segment, ctx['tmpfilename'], fatal):
return False return False
self._finish_frag_download(ctx) self._finish_frag_download(ctx)