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Added Readme and fixed basic issues

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Added usage instructions, Fixed off by 1 issue and added support for various extensions to include CMAF and other content files.
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Jayapraveen 2021-04-20 20:38:46 +05:30
parent e2be55b2ae
commit 5490718902
2 changed files with 32 additions and 11 deletions
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17
README.md
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@ -1 +1,18 @@
# Drm Dash stream downloader
## Description
Downloads MPEG-DASH Cenc based drm contents by parsing the manifest if the keyID and key is known.
## Requirements
1. You would need to download ffmpeg and mp4decrypter from Bento4 SDK and ensure they are in path(typing their name in cmd invokes them).
2. Dash-IF conforming Manifest file having information about the cenc keyID ,PSSH box information.
3. Basic python knowledge to edit the script's manifest parser function according to your manifest and set your prefered download location.
## Usage
1. Clone the repository
2. Install the requirements in requirements.txt using pip
2. Find the manifest(mpd) file you would want to download and copy its url (Use Devtools if in a browser.)
3. View the mpd file and check if it uses single mp4 segment or multi segments($Number_xx$.mp4)
4. If it is of multi segments then use dashdownloader_multisegment.py
5. Paste the mpd url in the script at the bottom inside the standalone check condition in mpd variable.
4. Run the script after checking requirements are satisfied.

26
dashdownloader_multisegment.py
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@ -90,7 +90,7 @@ def download_media(filename,url,epoch = 0):
else:
try:
with open(filename, 'wb') as video_file:
shutil.copyfileobj(video.raw, video_file)
shutil.copyfileobj(media.raw, video_file)
return False #Successfully downloaded the file
except:
print("Connection error: Reattempting download of video..")
@ -139,25 +139,25 @@ def decrypt(kid,filename):
def handle_irregular_segments(media_info,video_title,output_path):
no_segment,video_url,video_kid,no_segment,audio_url,audio_kid = media_info
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_1.mp4",video_init)
download_media("audio_1.mp4",audio_init)
for count in range(2,no_segment):
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)}.mp4",video_segment_url)
audio_status = download_media(f"audio_{str(count)}.mp4",audio_segment_url)
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}.mp4" for i in range(1,count)]) + " encrypted_video.mp4"
audio_concat_command = "copy /b " + "+".join([f"audio_{i}.mp4" for i in range(1,count)]) + " encrypted_audio.mp4"
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}.mp4" for i in range(1,count)]) + " > encrypted_video.mp4"
audio_concat_command = "cat " + " ".join([f"audio_{i}.mp4" for i in range(1,count)]) + " > encrypted_audio.mp4"
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
@ -190,11 +190,15 @@ def manifest_parser(mpd_url):
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('-','')