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dashdownloader_multisegment.py
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dashdownloader_multisegment.py
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#dashdrmmultisegmentdownloader
import os,requests,shutil,json,glob
from mpegdash.parser import MPEGDASHParser
from mpegdash.nodes import Descriptor
from mpegdash.utils import (
parse_attr_value, parse_child_nodes, parse_node_value,
write_attr_value, write_child_node, write_node_value
)
#global ids
retry = 3
download_dir = os.getcwd() # set the folder to output
working_dir = os.getcwd() + "\working_dir" # set the folder to download ephemeral files
keyfile_path = download_dir + "\keyfile_test.json"
if not os.path.exists(working_dir):
os.makedirs(working_dir)
#Get the keys
with open(keyfile_path,'r') as keyfile:
keyfile = keyfile.read()
keyfile = json.loads(keyfile)
#Patching the Mpegdash lib for keyID
def __init__(self):
self.scheme_id_uri = '' # xs:anyURI (required)
self.value = None # xs:string
self.id = None # xs:string
self.key_id = None # xs:string
def parse(self, xmlnode):
self.scheme_id_uri = parse_attr_value(xmlnode, 'schemeIdUri', str)
self.value = parse_attr_value(xmlnode, 'value', str)
self.id = parse_attr_value(xmlnode, 'id', str)
self.key_id = parse_attr_value(xmlnode, 'cenc:default_KID', str)
def write(self, xmlnode):
write_attr_value(xmlnode, 'schemeIdUri', self.scheme_id_uri)
write_attr_value(xmlnode, 'value', self.value)
write_attr_value(xmlnode, 'id', self.id)
write_attr_value(xmlnode, 'cenc:default_KID', self.key_id)
Descriptor.__init__ = __init__
Descriptor.parse = parse
Descriptor.write = write
def durationtoseconds(period):
#Duration format in PTxDxHxMxS
if(period[:2] == "PT"):
period = period[2:]
day = int(period.split("D")[0] if 'D' in period else 0)
hour = int(period.split("H")[0].split("D")[-1] if 'H' in period else 0)
minute = int(period.split("M")[0].split("H")[-1] if 'M' in period else 0)
second = period.split("S")[0].split("M")[-1]
print("Total time: " + str(day) + " days " + str(hour) + " hours " + str(minute) + " minutes and " + str(second) + " seconds")
total_time = float(str((day * 24 * 60 * 60) + (hour * 60 * 60) + (minute * 60) + (int(second.split('.')[0]))) + '.' + str(int(second.split('.')[-1])))
return total_time
else:
print("Duration Format Error")
return None
def download_media(filename,url,epoch = 0):
if(os.path.isfile(filename)):
media_head = requests.head(url, allow_redirects = True)
if media_head.status_code == 200:
media_length = int(media_head.headers.get("content-length"))
if(os.path.getsize(filename) >= media_length):
print("Video already downloaded.. skipping Downloading..")
else:
print("Redownloading faulty download..")
os.remove(filename) #Improve removing logic
download_media(filename,url)
else:
if (epoch > retry):
exit("Server doesn't support HEAD.")
download_media(filename,url,epoch + 1)
else:
media = requests.get(url, stream=True)
media_length = int(media.headers.get("content-length"))
if media.status_code == 200:
if(os.path.isfile(filename) and os.path.getsize(filename) >= video_length):
print("Video already downloaded.. skipping write to disk..")
else:
try:
with open(filename, 'wb') as video_file:
shutil.copyfileobj(media.raw, video_file)
return False #Successfully downloaded the file
except:
print("Connection error: Reattempting download of video..")
download_media(filename,url, epoch + 1)
if os.path.getsize(filename) >= video_length:
pass
else:
print("Error downloaded video is faulty.. Retrying to download")
download_media(filename,url, epoch + 1)
elif(media.status_code == 404):
print("Probably end hit!\n",url)
return True #Probably hit the last of the file
else:
if (epoch > retry):
exit("Error Video fetching exceeded retry times.")
print("Error fetching video file.. Retrying to download")
download_media(filename,url, epoch + 1)
def cleanup(path):
leftover_files = glob.glob(path + '/*.mp4', recursive=True)
mpd_files = glob.glob(path + '/*.mpd', recursive=True)
leftover_files = leftover_files + mpd_files
for file_list in leftover_files:
try:
os.remove(file_list)
except OSError:
print(f"Error deleting file: {file_list}")
def mux_process(video_title,outfile):
if os.name == "nt":
command = f"ffmpeg -y -i decrypted_audio.mp4 -i decrypted_video.mp4 -acodec copy -vcodec copy -fflags +bitexact -map_metadata -1 -metadata title=\"{video_title}\" -metadata creation_time=2020-00-00T70:05:30.000000Z {outfile}.mp4"
else:
command = f"nice -n 7 ffmpeg -y -i decrypted_audio.mp4 -i decrypted_video.mp4 -acodec copy -vcodec copy -fflags +bitexact -map_metadata -1 -metadata title=\"{video_title}\" -metadata creation_time=2020-00-00T70:05:30.000000Z {outfile}.mp4"
os.system(command)
def decrypt(kid,filename):
try:
key = keyfile[kid.lower()]
except KeyError as error:
exit("Key not found")
if(os.name == "nt"):
os.system(f"mp4decrypt --key 1:{key} encrypted_{filename}.mp4 decrypted_{filename}.mp4")
else:
os.system(f"nice -n 7 mp4decrypt --key 1:{key} encrypted_{filename}.mp4 decrypted_{filename}.mp4")
def handle_irregular_segments(media_info,video_title,output_path):
no_segment,video_url,video_kid,video_extension,no_segment,audio_url,audio_kid,audio_extension = media_info
video_url = base_url + video_url
audio_url = base_url + audio_url
video_init = video_url.replace("$Number$","init")
audio_init = audio_url.replace("$Number$","init")
download_media("video_0.mp4",video_init)
download_media("audio_0.mp4",audio_init)
for count in range(1,no_segment):
video_segment_url = video_url.replace("$Number$",str(count))
audio_segment_url = audio_url.replace("$Number$",str(count))
video_status = download_media(f"video_{str(count)}.{video_extension}",video_segment_url)
audio_status = download_media(f"audio_{str(count)}.{audio_extension}",audio_segment_url)
if(video_status):
if os.name == "nt":
video_concat_command = "copy /b " + "+".join([f"video_{i}.{video_extension}" for i in range(0,count)]) + " encrypted_video.mp4"
audio_concat_command = "copy /b " + "+".join([f"audio_{i}.{audio_extension}" for i in range(0,count)]) + " encrypted_audio.mp4"
else:
video_concat_command = "cat " + " ".join([f"video_{i}.{video_extension}" for i in range(0,count)]) + " > encrypted_video.mp4"
audio_concat_command = "cat " + " ".join([f"audio_{i}.{audio_extension}" for i in range(0,count)]) + " > encrypted_audio.mp4"
os.system(video_concat_command)
os.system(audio_concat_command)
break
decrypt(video_kid,"video")
decrypt(audio_kid,"audio")
mux_process(video_title,output_path)
def manifest_parser(mpd_url):
video = []
audio = []
manifest = requests.get(mpd_url).text
with open("manifest.mpd",'w') as manifest_handler:
manifest_handler.write(manifest)
mpd = MPEGDASHParser.parse("./manifest.mpd")
running_time = durationtoseconds(mpd.media_presentation_duration)
for period in mpd.periods:
for adapt_set in period.adaptation_sets:
print("Processing " + adapt_set.mime_type)
content_type = adapt_set.mime_type
repr = adapt_set.representations[-1] # Max Quality
for segment in repr.segment_templates:
if(segment.duration):
print("Media segments are of equal timeframe")
segment_time = segment.duration / segment.timescale
total_segments = running_time / segment_time
else:
print("Media segments are of inequal timeframe")
print(segment.media)
approx_no_segments = int(running_time // 10) # aproximate of 10 sec per segment
print("Expected No of segments:",approx_no_segments)
if(content_type == "audio/mp4"):
segment_extension = segment.media.split(".")[-1]
audio.append(approx_no_segments)
audio.append(segment.media)
audio.append(segment_extension)
elif(content_type == "video/mp4"):
segment_extension = segment.media.split(".")[-1]
video.append(approx_no_segments)
video.append(segment.media)
video.append(segment_extension)
for prot in repr.content_protections:
if(prot.value == "cenc"):
kId = prot.key_id.replace('-','')
if(content_type == "audio/mp4"):
audio.append(kId)
elif(content_type == "video/mp4"):
video.append(kId)
return video + audio
if __name__ == "__main__":
mpd = "https://www.example.com/index.mpd"
base_url = mpd.split("index.mpd")[0]
os.chdir(working_dir)
media_info = manifest_parser(mpd)
video_title = "Title of the video"
output_path = download_dir + "\output_video_name"
handle_irregular_segments(media_info,video_title,output_path)
cleanup(working_dir)