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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, '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>

55
yt_dlp/extractor/common.py
View file

@ -248,7 +248,9 @@ class InfoExtractor:
* hls_aes A dictionary of HLS AES-128 decryption information * hls_aes A dictionary of HLS AES-128 decryption information
used by the native HLS downloader to override the used by the native HLS downloader to override the
values in the media playlist when an '#EXT-X-KEY' tag 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 * uri The URI from which the key will be downloaded
* key The key (as hex) used to decrypt fragments. * key The key (as hex) used to decrypt fragments.
If `key` is given, any key URI will be ignored 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 * is_dash_periods Whether the format is a result of merging
multiple DASH periods. multiple DASH periods.
* dash_cenc A dictionary of DASH CENC decryption information * 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 * laurl The Clear Key license server URL from which
CENC keys will be downloaded. CENC keys will be downloaded.
* key_ids List of key IDs (as hex) to request from the ClearKey * 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' assert 'is_dash_periods' not in f, 'format already processed'
f['is_dash_periods'] = True f['is_dash_periods'] = True
format_key = tuple(v for k, v in f.items() if k not in ( format_key = tuple(v for k, v in f.items() if k not in (
('format_id', 'fragments', 'manifest_stream_number', 'dash_cenc'))) ('format_id', 'fragments', 'manifest_stream_number', 'dash_cenc', 'hls_aes')))
if 'dash_cenc' in f: for k in ('dash_cenc', 'hls_aes'):
format_key = format_key + tuple( if k in f:
tuple(v) if isinstance(v, list) else v for v in f['dash_cenc'].values()) format_key = format_key + tuple(
tuple(v) if isinstance(v, list) else v for v in f[k].values())
if format_key not in formats: if format_key not in formats:
formats[format_key] = f formats[format_key] = f
elif 'fragments' in f: elif 'fragments' in f:
@ -2718,15 +2722,13 @@ def _add_ns(path):
return self._xpath_ns(path, namespace) return self._xpath_ns(path, namespace)
def extract_drm_info(element): def extract_drm_info(element):
info = {}
has_drm = False has_drm = False
cenc_info = {}
for cp_e in element.findall(_add_ns('ContentProtection')): for cp_e in element.findall(_add_ns('ContentProtection')):
has_drm = True has_drm = True
self._extract_mpd_content_protection_info(cp_e, cenc_info) self._extract_mpd_content_protection_info(cp_e, info)
info = {'dash_cenc': cenc_info} if cenc_info else {} cenc_info = info.get('dash_cenc', {})
if has_drm and not ( 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'))):
cenc_info.get('key') or cenc_info.get('laurl') and cenc_info.get('key_ids')
):
info['has_drm'] = True info['has_drm'] = True
return info return info
@ -3051,7 +3053,7 @@ def add_segment_url():
period_entry['subtitles'][lang or 'und'].append(f) period_entry['subtitles'][lang or 'und'].append(f)
yield period_entry 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. 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 from the manifest or when an extractor needs to process the optional data section in W3C
PSSH boxes). PSSH boxes).
Note that the `has_drm` flag will be set for any format that does not meet one or more Note that after all ContentProtection elements have been handled, the `has_drm` flag
of these conditions: 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 * `dash_cenc` is set and both `laurl` and `key_ids` are set (indicating the native
use the specified Clear Key server URL to retreive the CENC key for this format. DASH downloader should use the specified Clear Key server URL to retreive the
* `key_id` is set (indicating the native DASH downloader should use the specified
CENC key for this format). 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: References:
1. DASH-IF Content Protection Identifiers 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 https://w3c.github.io/encrypted-media/format-registry/initdata/cenc.html
""" """
scheme_id = cp_e.get('schemeIdUri') scheme_id = cp_e.get('schemeIdUri')
cenc_info = info.get('dash_cenc', {})
if scheme_id == 'urn:mpeg:dash:mp4protection:2011': if scheme_id == 'urn:mpeg:dash:mp4protection:2011':
if cp_e.get('value') == 'cenc': if cp_e.get('value') == 'cenc':
# ISO/IEC 23009-1 MPEG Common Encryption (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 cenc_info['key_ids'] = kids
except (ValueError, TypeError, struct.error): except (ValueError, TypeError, struct.error):
pass 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): def _extract_ism_formats(self, *args, **kwargs):
fmts, subs = self._extract_ism_formats_and_subtitles(*args, **kwargs) fmts, subs = self._extract_ism_formats_and_subtitles(*args, **kwargs)