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dash: rewrote the parsing of the .mpd files.
This commit is contained in:
Johan Andersson
parent
1fdd3255bc
commit
d1b6ba2ee1
@ -25,6 +25,88 @@ class LiveDASHException(DASHException):
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url, "This is a live DASH stream, and they are not supported.")
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def templateelemt(element, filename, idnumber):
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files = []
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init = element.attrib["initialization"]
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media = element.attrib["media"]
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if "startNumber" in element.attrib:
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start = int(element.attrib["startNumber"])
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else:
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start = 0
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timeline = element.find("{urn:mpeg:dash:schema:mpd:2011}SegmentTimeline")
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rvalue = timeline.findall(".//{urn:mpeg:dash:schema:mpd:2011}S[@r]")
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selements = timeline.findall(".//{urn:mpeg:dash:schema:mpd:2011}S")
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selements.pop()
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if rvalue:
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total = int(rvalue[0].attrib["r"]) + len(selements) + 1
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name = media.replace("$RepresentationID$", idnumber)
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files.append(urljoin(filename, init.replace("$RepresentationID$", idnumber)))
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if "$Time$" in media:
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time = []
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time.append(0)
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for n in selements:
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time.append(int(n.attrib["d"]))
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match = re.search("\$Time\$", name)
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if match:
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number = 0
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if len(selements) < 3:
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for n in range(start, start + total):
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new = name.replace("$Time$", str(n * int(rvalue[0].attrib["d"])))
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files.append(urljoin(filename, new))
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else:
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for n in time:
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number += int(n)
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new = name.replace("$Time$", str(number))
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files.append(urljoin(filename, new))
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if "$Number" in name:
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if re.search("\$Number(\%\d+)d\$", name):
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vname = name.replace("$Number", "").replace("$", "")
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for n in range(start, start + total):
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files.append(urljoin(filename, vname % n))
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else:
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for n in range(start, start + total):
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newname = name.replace("$Number$", str(n))
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files.append(urljoin(filename, newname))
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return files
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def adaptionset(element, url, baseurl=None):
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streams = {}
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dirname = os.path.dirname(url) + "/"
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if baseurl:
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dirname = urljoin(dirname, baseurl)
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template = element[0].find("{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate")
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represtation = element[0].findall(".//{urn:mpeg:dash:schema:mpd:2011}Representation")
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for i in represtation:
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files = []
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segments = False
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filename = dirname
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bitrate = int(int(i.attrib["bandwidth"]) / 1000)
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idnumber = i.attrib["id"]
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if i.find("{urn:mpeg:dash:schema:mpd:2011}BaseURL") is not None:
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filename = urljoin(filename, i.find("{urn:mpeg:dash:schema:mpd:2011}BaseURL").text)
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if i.find("{urn:mpeg:dash:schema:mpd:2011}SegmentBase") is not None:
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files.append(filename)
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if template:
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segments = True
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files = templateelemt(template, filename, idnumber)
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elif i.find("{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate"):
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segments = True
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files = templateelemt(i.find("{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate"), filename, idnumber)
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streams[bitrate] = {"segments": segments, "files": files}
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return streams
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def dashparse(options, res, url):
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streams = {}
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@ -35,96 +117,20 @@ def dashparse(options, res, url):
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streams[0] = ServiceError("Can't read DASH playlist. {0}".format(res.status_code))
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return streams
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xml = ET.XML(res.text)
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if "isoff-on-demand" in xml.attrib["profiles"]:
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try:
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baseurl = urljoin(url, xml.find("{urn:mpeg:dash:schema:mpd:2011}BaseURL").text)
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except AttributeError:
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streams[0] = ServiceError("Can't parse DASH playlist")
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return
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videofiles = xml.findall(".//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@contentType='video']/{urn:mpeg:dash:schema:mpd:2011}Representation")
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audiofiles = xml.findall(".//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@contentType='audio']/{urn:mpeg:dash:schema:mpd:2011}Representation")
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for i in audiofiles:
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audiourl = urljoin(baseurl, i.find("{urn:mpeg:dash:schema:mpd:2011}BaseURL").text)
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audiobitrate = float(i.attrib["bandwidth"]) / 1000
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for n in videofiles:
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bitrate = float(n.attrib["bandwidth"])/1000 + audiobitrate
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videourl = urljoin(baseurl, n.find("{urn:mpeg:dash:schema:mpd:2011}BaseURL").text)
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options.other = "mp4"
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streams[int(bitrate)] = DASH(copy.copy(options), videourl, bitrate, cookies=res.cookies, audio=audiourl)
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if "isoff-live" in xml.attrib["profiles"]:
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video = xml.findall(".//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@contentType='video']")
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if len(video) == 0:
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video = xml.findall(".//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@mimeType='video/mp4']")
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audio = xml.findall(".//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@contentType='audio']")
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if len(audio) == 0:
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audio = xml.findall(".//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@mimeType='audio/mp4']")
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videofiles = parsesegments(video, url)
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audiofiles = parsesegments(audio, url)
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for i in videofiles.keys():
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bitrate = (int(i) + int(list(audiofiles.keys())[0])) /1000
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options.other = "mp4"
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streams[int(bitrate)] = DASH(copy.copy(options), url, bitrate, cookies=res.cookies, audio=audiofiles[list(audiofiles.keys())[0]], files=videofiles[i])
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temp = xml.findall('.//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@mimeType="audio/mp4"]')
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audiofiles = adaptionset(temp, url)
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temp = xml.findall('.//{urn:mpeg:dash:schema:mpd:2011}AdaptationSet[@mimeType="video/mp4"]')
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videofiles = adaptionset(temp, url)
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for i in videofiles.keys():
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bitrate = (int(i) + int(list(audiofiles.keys())[0])) / 1000
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options.other = "mp4"
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options.segments = videofiles[i]["segments"]
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streams[int(bitrate)] = DASH(copy.copy(options), url, bitrate, cookies=res.cookies, audio=audiofiles[list(audiofiles.keys())[0]]["files"], files=videofiles[i]["files"])
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return streams
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def parsesegments(content, url):
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media = content[0].find("{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate")
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if media is not None:
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scheme = media.attrib["media"]
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vinit = content[0].find("{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate")
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if vinit is not None:
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init = vinit.attrib["initialization"]
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nrofvideos = content[0].findall(".//{urn:mpeg:dash:schema:mpd:2011}S[@r]")
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selemtns = content[0].findall(".//{urn:mpeg:dash:schema:mpd:2011}S")
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total = 0
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if nrofvideos:
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total = int(nrofvideos[0].attrib["r"]) + len(selemtns) + 1
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time = False
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else:
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time = []
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time.append(0)
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for i in selemtns:
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time.append(int(i.attrib["d"]))
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elements = content[0].findall(".//{urn:mpeg:dash:schema:mpd:2011}Representation")
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files = {}
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for i in elements:
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id = i.attrib["id"]
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segments = []
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bitrate = int(i.attrib["bandwidth"])
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if vinit is None:
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init = i.find("{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate").attrib["initialization"]
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vidinit = init.replace("$RepresentationID$", id)
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if media is None:
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scheme = i.find("{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate").attrib["media"]
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if "startNumber" in content[0].findall(".//{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate")[0].attrib:
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start = int(content[0].findall(".//{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate")[0].attrib["startNumber"])
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else:
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start = 1
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dirname = os.path.dirname(url) + "/"
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segments.append(urljoin(dirname, vidinit))
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name = scheme.replace("$RepresentationID$", id)
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if "$Number" in name:
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match = re.search("\$Number(\%\d+)d\$", name)
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if match:
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vname = name.replace("$Number", "").replace("$", "")
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for n in range(start, start+total):
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segments.append(urljoin(dirname, vname % n))
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else:
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#not format string
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for n in range(start, start + total):
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newname = name.replace("$Number$", str(n))
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segments.append(urljoin(dirname, newname))
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if "$Time$" in name:
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match = re.search("\$Time\$", name)
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if match:
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number = 0
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for n in time:
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number += int(n)
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new = name.replace("$Time$", str(number))
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segments.append(urljoin(dirname, new))
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files[bitrate] = segments
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return files
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class DASH(VideoRetriever):
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def name(self):
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@ -134,7 +140,7 @@ class DASH(VideoRetriever):
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if self.options.live and not self.options.force:
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raise LiveDASHException(self.url)
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if self.files:
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if self.options.segments:
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if self.audio:
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self._download2(self.audio, audio=True)
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self._download2(self.files)
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