1 from __future__ import division, unicode_literals
6 from .common import FileDownloader
7 from .http import HttpFD
14 class HttpQuietDownloader(HttpFD):
15 def to_screen(self, *args, **kargs):
19 class FragmentFD(FileDownloader):
21 A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests).
25 fragment_retries: Number of times to retry a fragment for HTTP error (DASH
27 skip_unavailable_fragments:
28 Skip unavailable fragments (DASH and hlsnative only)
31 def report_retry_fragment(self, fragment_name, count, retries):
33 '[download] Got server HTTP error: %s. Retrying fragment %s (attempt %d of %s)...'
34 % (fragment_name, count, self.format_retries(retries)))
36 def report_skip_fragment(self, fragment_name):
37 self.to_screen('[download] Skipping fragment %s...' % fragment_name)
39 def _prepare_and_start_frag_download(self, ctx):
40 self._prepare_frag_download(ctx)
41 self._start_frag_download(ctx)
43 def _prepare_frag_download(self, ctx):
47 '[%s] Total fragments: %s'
48 % (self.FD_NAME, ctx['total_frags'] if not ctx['live'] else 'unknown (live)'))
49 self.report_destination(ctx['filename'])
50 dl = HttpQuietDownloader(
56 'ratelimit': self.params.get('ratelimit'),
57 'retries': self.params.get('retries', 0),
58 'test': self.params.get('test', False),
61 tmpfilename = self.temp_name(ctx['filename'])
62 dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb')
65 'dest_stream': dest_stream,
66 'tmpfilename': tmpfilename,
69 def _start_frag_download(self, ctx):
70 total_frags = ctx['total_frags']
71 # This dict stores the download progress, it's updated by the progress
74 'status': 'downloading',
75 'downloaded_bytes': 0,
77 'frag_count': total_frags,
78 'filename': ctx['filename'],
79 'tmpfilename': ctx['tmpfilename'],
85 # Total complete fragments downloaded so far in bytes
86 'complete_frags_downloaded_bytes': 0,
87 # Amount of fragment's bytes downloaded by the time of the previous
88 # frag progress hook invocation
89 'prev_frag_downloaded_bytes': 0,
92 def frag_progress_hook(s):
93 if s['status'] not in ('downloading', 'finished'):
96 time_now = time.time()
97 state['elapsed'] = time_now - start
98 frag_total_bytes = s.get('total_bytes') or 0
101 (ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) /
102 (state['frag_index'] + 1) * total_frags)
103 state['total_bytes_estimate'] = estimated_size
105 if s['status'] == 'finished':
106 state['frag_index'] += 1
107 state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes']
108 ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes']
109 ctx['prev_frag_downloaded_bytes'] = 0
111 frag_downloaded_bytes = s['downloaded_bytes']
112 state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes']
114 state['eta'] = self.calc_eta(
115 start, time_now, estimated_size,
116 state['downloaded_bytes'])
117 state['speed'] = s.get('speed') or ctx.get('speed')
118 ctx['speed'] = state['speed']
119 ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes
120 self._hook_progress(state)
122 ctx['dl'].add_progress_hook(frag_progress_hook)
126 def _finish_frag_download(self, ctx):
127 ctx['dest_stream'].close()
128 elapsed = time.time() - ctx['started']
129 self.try_rename(ctx['tmpfilename'], ctx['filename'])
130 fsize = os.path.getsize(encodeFilename(ctx['filename']))
132 self._hook_progress({
133 'downloaded_bytes': fsize,
134 'total_bytes': fsize,
135 'filename': ctx['filename'],
136 'status': 'finished',