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[extractor] Parse DASH-SEA content protection in DASH manifests

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This commit is contained in:
Peter Rowlands 2024-10-05 14:50:13 +09:00
parent 6b0ce31939
commit e0ce6eed92
3 changed files with 211 additions and 18 deletions
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65
test/test_InfoExtractor.py
View file

@ -1473,6 +1473,71 @@ def test_parse_mpd_formats(self):
'has_drm': True,
}],
{},
), (
# DASH SEA with AES-128-CBC
'dash_sea',
'https://unknown/manifest.mpd', # mpd_url
'https://unknown/', # mpd_base_url
[{
'manifest_url': 'https://unknown/manifest.mpd',
'ext': 'm4a',
'format_id': '5_A_aac_eng_2_127999_2_1_1',
'format_note': 'DASH audio',
'protocol': 'http_dash_segments',
'acodec': 'mp4a.40.2',
'vcodec': 'none',
'tbr': 127.999,
'hls_aes': {
'uri': 'https://zavideoplatform.keydelivery.eastus.media.azure.net/?kid=9280864f-064e-48c0-97e0-f2bcb1d8d012',
'iv': '0x7BD31E102B0CE9CCD39691782533656C',
},
}, {
'manifest_url': 'https://unknown/manifest.mpd',
'ext': 'mp4',
'format_id': '1_V_video_3',
'format_note': 'DASH video',
'protocol': 'http_dash_segments',
'acodec': 'none',
'vcodec': 'avc1.64001F',
'tbr': 258.591,
'width': 960,
'height': 540,
'hls_aes': {
'uri': 'https://zavideoplatform.keydelivery.eastus.media.azure.net/?kid=9280864f-064e-48c0-97e0-f2bcb1d8d012',
'iv': '0x7BD31E102B0CE9CCD39691782533656C',
},
}, {
'manifest_url': 'https://unknown/manifest.mpd',
'ext': 'mp4',
'format_id': '1_V_video_2',
'format_note': 'DASH video',
'protocol': 'http_dash_segments',
'acodec': 'none',
'vcodec': 'avc1.64001F',
'tbr': 422.519,
'width': 1280,
'height': 720,
'hls_aes': {
'uri': 'https://zavideoplatform.keydelivery.eastus.media.azure.net/?kid=9280864f-064e-48c0-97e0-f2bcb1d8d012',
'iv': '0x7BD31E102B0CE9CCD39691782533656C',
},
}, {
'manifest_url': 'https://unknown/manifest.mpd',
'ext': 'mp4',
'format_id': '1_V_video_1',
'format_note': 'DASH video',
'protocol': 'http_dash_segments',
'acodec': 'none',
'vcodec': 'avc1.640028',
'tbr': 628.102,
'width': 1920,
'height': 1080,
'hls_aes': {
'uri': 'https://zavideoplatform.keydelivery.eastus.media.azure.net/?kid=9280864f-064e-48c0-97e0-f2bcb1d8d012',
'iv': '0x7BD31E102B0CE9CCD39691782533656C',
},
}],
{},
),
]

109
test/testdata/mpd/dash_sea.mpd vendored Normal file
View file

@ -0,0 +1,109 @@
<?xml version="1.0" encoding="utf-8"?>
<MPD
xmlns="urn:mpeg:dash:schema:mpd:2011"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static"
xmlns:sea="urn:mpeg:dash:schema:sea:2012" mediaPresentationDuration="PT3M32.949S" minBufferTime="PT3S">
<Period>
<AdaptationSet id="1" group="5" profiles="ccff" bitstreamSwitching="false" segmentAlignment="true" contentType="audio" mimeType="audio/mp4" codecs="mp4a.40.2" lang="en">
<ContentProtection schemeIdUri="urn:mpeg:dash:sea:2012">
<sea:SegmentEncryption schemeIdUri="urn:mpeg:dash:sea:aes128-cbc:2013"/>
<sea:KeySystem keySystemUri="urn:mpeg:dash:sea:keysys:http:2013"/>
<sea:CryptoPeriod keyUriTemplate="https://zavideoplatform.keydelivery.eastus.media.azure.net/?kid=9280864f-064e-48c0-97e0-f2bcb1d8d012" IV="0x7BD31E102B0CE9CCD39691782533656C"/>
</ContentProtection>
<Label>aac_eng_2_127999_2_1</Label>
<SegmentTemplate timescale="10000000" media="QualityLevels($Bandwidth$)/Fragments(aac_eng_2_127999_2_1=$Time$,format=mpd-time-csf)" initialization="QualityLevels($Bandwidth$)/Fragments(aac_eng_2_127999_2_1=i,format=mpd-time-csf)">
<SegmentTimeline>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333" r="1"/>
<S d="20053334"/>
<S d="20053333"/>
<S d="3840000"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="5_A_aac_eng_2_127999_2_1_1" bandwidth="127999" audioSamplingRate="48000"/>
</AdaptationSet>
<AdaptationSet id="2" group="1" profiles="ccff" bitstreamSwitching="false" segmentAlignment="true" contentType="video" mimeType="video/mp4" codecs="avc1.640028" maxWidth="1920" maxHeight="1080" startWithSAP="1">
<ContentProtection schemeIdUri="urn:mpeg:dash:sea:2012">
<sea:SegmentEncryption schemeIdUri="urn:mpeg:dash:sea:aes128-cbc:2013"/>
<sea:KeySystem keySystemUri="urn:mpeg:dash:sea:keysys:http:2013"/>
<sea:CryptoPeriod keyUriTemplate="https://zavideoplatform.keydelivery.eastus.media.azure.net/?kid=9280864f-064e-48c0-97e0-f2bcb1d8d012" IV="0x7BD31E102B0CE9CCD39691782533656C"/>
</ContentProtection>
<SegmentTemplate timescale="10000000" media="QualityLevels($Bandwidth$)/Fragments(video=$Time$,format=mpd-time-csf)" initialization="QualityLevels($Bandwidth$)/Fragments(video=i,format=mpd-time-csf)">
<SegmentTimeline>
<S d="20000000" r="105"/>
<S d="8666666"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="1_V_video_1" bandwidth="628102" width="1920" height="1080"/>
<Representation id="1_V_video_2" bandwidth="422519" codecs="avc1.64001F" width="1280" height="720"/>
<Representation id="1_V_video_3" bandwidth="258591" codecs="avc1.64001F" width="960" height="540"/>
</AdaptationSet>
</Period>
</MPD>

53
yt_dlp/extractor/common.py
View file

@ -248,7 +248,9 @@ class InfoExtractor:
* hls_aes A dictionary of HLS AES-128 decryption information
used by the native HLS downloader to override the
values in the media playlist when an '#EXT-X-KEY' tag
is present in the playlist:
is present in the playlist. Used by the native DASH downloader
when DASH-SEA with AES-128-CBC content protection is present
in the manifest.:
* uri The URI from which the key will be downloaded
* key The key (as hex) used to decrypt fragments.
If `key` is given, any key URI will be ignored
@ -261,7 +263,8 @@ class InfoExtractor:
* is_dash_periods Whether the format is a result of merging
multiple DASH periods.
* dash_cenc A dictionary of DASH CENC decryption information
used by the native DASH downloader when set.
used by the native DASH downloader when MPEG CENC content protection
is present in the manifest.
* laurl The Clear Key license server URL from which
CENC keys will be downloaded.
* key_ids List of key IDs (as hex) to request from the ClearKey
@ -2680,10 +2683,11 @@ def _merge_mpd_periods(self, periods):
assert 'is_dash_periods' not in f, 'format already processed'
f['is_dash_periods'] = True
format_key = tuple(v for k, v in f.items() if k not in (
('format_id', 'fragments', 'manifest_stream_number', 'dash_cenc')))
if 'dash_cenc' in f:
('format_id', 'fragments', 'manifest_stream_number', 'dash_cenc', 'hls_aes')))
for k in ('dash_cenc', 'hls_aes'):
if k in f:
format_key = format_key + tuple(
tuple(v) if isinstance(v, list) else v for v in f['dash_cenc'].values())
tuple(v) if isinstance(v, list) else v for v in f[k].values())
if format_key not in formats:
formats[format_key] = f
elif 'fragments' in f:
@ -2718,15 +2722,13 @@ def _add_ns(path):
return self._xpath_ns(path, namespace)
def extract_drm_info(element):
info = {}
has_drm = False
cenc_info = {}
for cp_e in element.findall(_add_ns('ContentProtection')):
has_drm = True
self._extract_mpd_content_protection_info(cp_e, cenc_info)
info = {'dash_cenc': cenc_info} if cenc_info else {}
if has_drm and not (
cenc_info.get('key') or cenc_info.get('laurl') and cenc_info.get('key_ids')
):
self._extract_mpd_content_protection_info(cp_e, info)
cenc_info = info.get('dash_cenc', {})
if has_drm and not ('hls_aes' in info or cenc_info.get('key') or (cenc_info.get('laurl') and cenc_info.get('key_ids'))):
info['has_drm'] = True
return info
@ -3051,7 +3053,7 @@ def add_segment_url():
period_entry['subtitles'][lang or 'und'].append(f)
yield period_entry
def _extract_mpd_content_protection_info(self, cp_e, cenc_info):
def _extract_mpd_content_protection_info(self, cp_e, info):
"""
Extract supported DASH-CENC parameters for an MPD ContentProtection element.
@ -3061,13 +3063,16 @@ def _extract_mpd_content_protection_info(self, cp_e, cenc_info):
from the manifest or when an extractor needs to process the optional data section in W3C
PSSH boxes).
Note that the `has_drm` flag will be set for any format that does not meet one or more
of these conditions:
Note that after all ContentProtection elements have been handled, the `has_drm` flag
will be set for any format that does not meet one or more of these conditions:
* Both `laurl` and `key_ids` are set (indicating the native DASH downloader should
use the specified Clear Key server URL to retreive the CENC key for this format.
* `key_id` is set (indicating the native DASH downloader should use the specified
* `dash_cenc` is set and both `laurl` and `key_ids` are set (indicating the native
DASH downloader should use the specified Clear Key server URL to retreive the
CENC key for this format).
* `dash_cenc` is set and `key` is set (indicating the native DASH downloader should
use the specified CENC key for this format).
* `hls_aes` is set (indicating the native DASH downloader should use DASH SEA
AES-128-CBC decryption for this format).
References:
1. DASH-IF Content Protection Identifiers
@ -3078,6 +3083,7 @@ def _extract_mpd_content_protection_info(self, cp_e, cenc_info):
https://w3c.github.io/encrypted-media/format-registry/initdata/cenc.html
"""
scheme_id = cp_e.get('schemeIdUri')
cenc_info = info.get('dash_cenc', {})
if scheme_id == 'urn:mpeg:dash:mp4protection:2011':
if cp_e.get('value') == 'cenc':
# ISO/IEC 23009-1 MPEG Common Encryption (CENC)
@ -3113,6 +3119,19 @@ def _extract_mpd_content_protection_info(self, cp_e, cenc_info):
cenc_info['key_ids'] = kids
except (ValueError, TypeError, struct.error):
pass
elif scheme_id == 'urn:mpeg:dash:sea:2012':
# ISO/IEC 23009-4 DASH Segment Encryption and Authentication (AES-128-CBC)
sea_ns = 'urn:mpeg:dash:schema:sea:2012'
se_e = cp_e.find(self._xpath_ns('SegmentEncryption', sea_ns))
ks_e = cp_e.find(self._xpath_ns('KeySystem', sea_ns))
crypto_e = cp_e.find(self._xpath_ns('CryptoPeriod', sea_ns))
if (se_e is not None and se_e.get('schemeIdUri') == 'urn:mpeg:dash:sea:aes128-cbc:2013'
and ks_e is not None and ks_e.get('keySystemUri') == 'urn:mpeg:dash:sea:keysys:http:2013'
and crypto_e is not None and crypto_e.get('keyUriTemplate') and crypto_e.get('IV')
):
info['hls_aes'] = {'uri': crypto_e.get('keyUriTemplate'), 'iv': crypto_e.get('IV')}
if cenc_info:
info['dash_cenc'] = cenc_info
def _extract_ism_formats(self, *args, **kwargs):
fmts, subs = self._extract_ism_formats_and_subtitles(*args, **kwargs)