diff options
Diffstat (limited to 'hypervideo_dl/downloader/dash.py')
| -rw-r--r-- | hypervideo_dl/downloader/dash.py | 88 |
1 files changed, 35 insertions, 53 deletions
diff --git a/hypervideo_dl/downloader/dash.py b/hypervideo_dl/downloader/dash.py index c6d674b..6444ad6 100644 --- a/hypervideo_dl/downloader/dash.py +++ b/hypervideo_dl/downloader/dash.py @@ -1,80 +1,62 @@ from __future__ import unicode_literals +from ..downloader import get_suitable_downloader from .fragment import FragmentFD -from ..compat import compat_urllib_error -from ..utils import ( - DownloadError, - urljoin, -) + +from ..utils import urljoin class DashSegmentsFD(FragmentFD): """ - Download segments in a DASH manifest + 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), } - self._prepare_and_start_frag_download(ctx) - - fragment_retries = self.params.get('fragment_retries', 0) - skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True) + 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 - # 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 - count = 0 - while count <= fragment_retries: - try: - 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: - return False - self._append_fragment(ctx, frag_content) - break - except compat_urllib_error.HTTPError as err: - # YouTube may often return 404 HTTP error for a fragment causing the - # whole download to fail. However if the same fragment is immediately - # retried with the same request data this usually succeeds (1-2 attempts - # is usually enough) thus allowing to download the whole file successfully. - # To be future-proof we will retry all fragments that fail with any - # HTTP error. - count += 1 - if count <= fragment_retries: - self.report_retry_fragment(err, frag_index, count, fragment_retries) - except DownloadError: - # Don't retry fragment if error occurred during HTTP downloading - # itself since it has own retry settings - if not fatal: - self.report_skip_fragment(frag_index) - break - raise - - if count > fragment_retries: - if not fatal: - self.report_skip_fragment(frag_index) - continue - self.report_error('giving up after %s fragment retries' % fragment_retries) - return False - - self._finish_frag_download(ctx) - - return True + 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) |