Halaman ini menjelaskan cara mengenkripsi konten live stream. Live Stream API tidak membuat atau mengelola kunci enkripsi atau lisensi secara langsung. Sebagai gantinya, Anda harus menggunakan penyedia manajemen hak digital (DRM) pihak ketiga untuk fitur ini. Setelah kunci enkripsi dibuat untuk media Anda, teruskan kunci tersebut ke Live Stream API menggunakan Secret Manager.
Setelan enkripsi ditentukan dalam setelan
Channel
. Setelah streaming dimulai, pipeline video Live Stream API
akan mulai mengenkripsi konten Anda. Manifes output menyertakan informasi
yang diperlukan untuk mendekripsi konten dalam pemutar media pilihan Anda.
Konfigurasi yang didukung
Protokol streaming | Container | Sistem DRM | Skema enkripsi |
---|---|---|---|
HLS | TS | ClearKey | aes128 |
HLS | TS | ClearKey | sampleAes |
HLS | TS | FairPlay | sampleAes |
HLS | fMP4 | FairPlay | Khusus mpegCenc cbcs |
MPEG-DASH | fMP4 | ClearKey | mpegCenc cenc atau cbcs |
MPEG-DASH | fMP4 | Widevine | mpegCenc cenc atau cbcs |
HLS | fMP4 | Widevine | mpegCenc cenc atau cbcs |
MPEG-DASH | fMP4 | PlayReady | mpegCenc cenc atau cbcs |
HLS | fMP4 | PlayReady | mpegCenc cenc atau cbcs |
Menambahkan kunci enkripsi ke Secret Manager
Sebelum memulai, buat kunci enkripsi menggunakan penyedia DRM pihak ketiga pilihan Anda.
Live Stream API mengharuskan secret Anda berisi kunci enkripsi dalam format JSON berikut, beserta informasi lain yang diperlukan.
Lihat dokumentasi protokol DRM untuk mengetahui deskripsi setiap kolom. Perhatikan bahwa Anda perlu mengonversi dari snake case ke camel case untuk format JSON.
Contoh JSON
{
"encryptionKeys": [
{
// Key for FairPlay configuration.
"keyId": "d569cb35bd0548c7a99d92feb381df13",
"key": "f1967daca83e81f38d80aa741e7b32c2",
"iv": "8d80aa741e7b32c2f1967daca83e81f3",
"keyUri": "skd://d569cb35bd0548c7a99d92feb381df13",
"matchers": [
{
"muxStreams": ["ts_fairplay"]
}
]
},
{
// Key for Widevine configurations.
"keyId": "44ec248b048c43a6a6ee58a752c6f9f8",
"key": "f1967daca83e81f38d80aa741e7b32c2",
"keyUri": "skd://44ec248b048c43a6a6ee58a752c6f9f8",
"matchers": [
{
"muxStreams": [
"fmp4_widevine_cenc_video",
"fmp4_widevine_cenc_audio",
"fmp4_widevine_cbcs_video",
"fmp4_widevine_cbcs_audio"
]
}
]
},
{
// Key for PlayReady configurations.
"keyId": "8beed229709f480bb6004ec0f33e82d1",
"key": "ad20cd838f354dcc8a77c443d08ff09f",
"keyUri": "skd://8beed229709f480bb6004ec0f33e82d1",
"matchers": [
{
"muxStreams": [
"fmp4_playready_cenc_video",
"fmp4_playready_cenc_audio",
"fmp4_playready_cbcs_video",
"fmp4_playready_cbcs_audio"
]
}
]
},
{
// Key for all ClearKey configurations.
"keyId": "3d9dccb479c64adbb6e514790caa7822",
"key": "f1967daca83e81f38d80aa741e7b32c2",
"keyUri": "https://example.com/keys/3d9dccb479c64adbb6e514790caa7822.bin",
"iv": "8d80aa741e7b32c2f1967daca83e81f3"
// No `matchers` field. This is the default key to use when none of the keys above match.
}
]
}
Jika konfigurasi enkripsi Anda (misalnya, FairPlay) memerlukan vektor inisialisasi (IV) eksplisit, tetapi tidak disertakan, API akan menggunakan nilai
keyId
untuk nilai iv
.
Untuk menambahkan kunci enkripsi, lakukan salah satu hal berikut:
Menambahkan dan mengonfigurasi kunci secara manual. Gunakan data JSON sebelumnya, tambahkan kunci enkripsi Anda ke Secret Manager dengan mengikuti langkah-langkah di Membuat secret.
Terapkan
key publisher
yang mendapatkan kunci enkripsi yang diperlukan dan menulisnya ke Secret Manager sebagai versi secret. Lihat contoh penerapan yang berjalan sebagai fungsi Cloud Run.
Kemudian, lakukan hal berikut untuk mengonfigurasi kunci enkripsi Anda:
- Konfigurasikan izin IAM pada secret Anda agar Live Stream API
dapat mengakses konten secret. Untuk melakukannya, berikan peran
secretmanager.secretAccessor
ke akun layananservice-PROJECT_NUMBER@gcp-sa-livestream.iam.gserviceaccount.com
(ini mirip dengan cara akun layanan memiliki akses ke bucket Cloud Storage Anda). - Temukan nama resource versi secret yang Anda buat (misalnya,
projects/PROJECT_NUMBER/secrets/SECRET_ID/versions/VERSION_ID
). Anda memerlukan nama ini untuk mengonfigurasi saluran.
Mengonfigurasi saluran
Setelan enkripsi ditentukan menggunakan objek dalam
array
encryptions
di level Channel
. ID unik
(id
)
ditetapkan untuk setiap konfigurasi yang berbeda. Setiap muxStream
menggunakan
ID untuk menunjukkan konfigurasi enkripsi yang akan digunakan, atau menghapus kolom
tersebut agar tetap tidak dienkripsi.
Format JSON
{
// other channel settings …
"encryptions": [
{
// Identifier for this encryption configuration, to be specified in muxStream(s).
"id": string,
// Configuration for secrets stored in Google Secret Manager.
"secretManagerKeySource": {
// The name of the Secret Version containing the encryption key.
// `projects/{project}/secrets/{secret_id}/versions/{version_number}`
// Using {version_number} of `latest` is not supported.
"secretVersion": string
},
// DRM system(s) that will be used. At least one must be specified. If a DRM system
// is omitted, it will be considered disabled.
"drmSystems": {
// Widevine configuration.
"widevine": {},
// FairPlay configuration.
"fairplay": {},
// PlayReady configuration.
"playready": {},
// ClearKey configuration.
"clearkey": {}
},
// Union field encryption_mode can be only one of the following:
// Configuration for HLS AES-128 encryption.
"aes128": {},
// Configuration for HLS SAMPLE-AES encryption.
"sampleAes": {},
// Configuration for MPEG-DASH Common Encryption (MPEG-CENC).
"mpegCenc": {
// Specify the encryption scheme. Supported schemes:
// - `cenc` - AES-CTR subsample
// - `cbcs`- AES-CBC subsample pattern
"scheme": string
}
// End of list of possible types for union field encryption_mode.
}
// Any other encryption configurations.
],
"muxStreams": [
{
// Unique identifier for the muxStream.
"key": string,
// Identifier of the encryption configuration for the muxStream.
"encryptionId": string
// … other muxStream settings.
}
// Other muxStreams.
],
// Other channel settings.
}
Contoh (ClearKey)
Contoh berikut mengonfigurasi muxStreams AES-128 dan SAMPLE-AES dalam manifes HLS, dan muxStreams MPEG-CENC (cenc dan cbcs) dalam manifes DASH:
"elementaryStreams": [
{
"key": "es_video",
"videoStream": {
"h264": {
"profile": "main",
"heightPixels": 600,
"widthPixels": 800,
"bitrateBps": 1000000,
"frameRate": 60,
},
},
},
{
"key": "es_audio",
"audioStream": {
"codec": "aac",
"channelCount": 2,
"bitrateBps": 160000
}
}
],
"encryptions": [
{
"id": "aes-128",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"clearkey": {}},
"aes128": {}
},
{
"id": "sample-aes",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"clearkey": {}},
"sampleAes": {}
},
{
"id": "cenc",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"clearkey": {}},
"mpegCenc": {
"scheme": "cenc"
}
},
{
"id": "cbcs",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"clearkey": {}},
"mpegCenc": {
"scheme": "cbcs"
}
}
],
"muxStreams": [
{
"key": "ts_aes128",
"container": "ts",
"elementaryStreams": ["es_video", "es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "aes-128"
},
{
"key": "ts_sampleaes",
"container": "ts",
"elementaryStreams": ["es_video", "es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "sample-aes"
},
{
"key": "fmp4_cenc_video",
"container": "fmp4",
"elementaryStreams": ["es_video"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "cenc"
},
{
"key": "fmp4_cenc_audio",
"container": "fmp4",
"elementaryStreams": ["es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "cenc"
},
{
"key": "fmp4_cbcs_video",
"container": "fmp4",
"elementaryStreams": ["es_video"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "cbcs"
},
{
"key": "fmp4_cbcs_audio",
"container": "fmp4",
"elementaryStreams": ["es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "cbcs"
}
],
"manifests": [
{
"key": "manifest_aes128_hls",
"fileName": "manifest_aes128.m3u8",
"type": "HLS",
"muxStreams": ["ts_aes128"],
"maxSegmentCount": 10
},
{
"key": "manifest_sampleaes_hls",
"fileName": "manifest_sampleaes.m3u8",
"type": "HLS",
"muxStreams": ["ts_sampleaes"],
"maxSegmentCount": 10
},
{
"key": "manifest_cenc_dash",
"fileName": "manifest_cenc.mpd",
"type": "DASH",
"muxStreams": ["fmp4_cenc_video", "fmp4_cenc_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_cbcs_dash",
"fileName": "manifest_cbcs.mpd",
"type": "DASH",
"muxStreams": ["fmp4_cbcs_video", "fmp4_cbcs_audio"],
"maxSegmentCount": 10
}
]
Contoh (FP/PR/Widevine)
Contoh berikut mengonfigurasi muxStreams FairPlay/SAMPLE-AES, Widevine/MPEG-CENC (cenc dan cbcs), dan PlayReady/MPEG-CENC (cenc dan cbcs). MuxStreams Widevine dan PlayReady disertakan dalam manifes HLS dan DASH.
"elementaryStreams": [
{
"key": "es_video",
"videoStream": {
"h264": {
"profile": "main",
"heightPixels": 600,
"widthPixels": 800,
"bitrateBps": 1000000,
"frameRate": 60,
},
},
},
{
"key": "es_audio",
"audioStream": {
"codec": "aac",
"channelCount": 2,
"bitrateBps": 160000
}
}
],
"encryptions": [
{
"id": "fairplay",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"fairplay": {}},
"sampleAes": {}
},
{
"id": "widevine-cenc",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"widevine": {}},
"mpegCenc": {
"scheme": "cenc"
}
},
{
"id": "widevine-cbcs",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"widevine": {}},
"mpegCenc": {
"scheme": "cbcs"
}
},
{
"id": "playready-cenc",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"playready": {}},
"mpegCenc": {
"scheme": "cenc"
}
},
{
"id": "playready-cbcs",
"secretManagerKeySource": {
"secretVersion": "projects/12345/secrets/key-1/versions/1"
},
"drmSystems": {"playready": {}},
"mpegCenc": {
"scheme": "cbcs"
}
}
],
"muxStreams": [
{
"key": "ts_fairplay",
"container": "ts",
"elementaryStreams": ["es_video", "es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "fairplay"
},
{
"key": "fmp4_widevine_cenc_video",
"container": "fmp4",
"elementaryStreams": ["es_video"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "widevine-cenc"
},
{
"key": "fmp4_widevine_cenc_audio",
"container": "fmp4",
"elementaryStreams": ["es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "widevine-cenc"
},
{
"key": "fmp4_widevine_cbcs_video",
"container": "fmp4",
"elementaryStreams": ["es_video"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "widevine-cbcs"
},
{
"key": "fmp4_widevine_cbcs_audio",
"container": "fmp4",
"elementaryStreams": ["es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "widevine-cbcs"
},
{
"key": "fmp4_playready_cenc_video",
"container": "fmp4",
"elementaryStreams": ["es_video"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "playready-cenc"
},
{
"key": "fmp4_playready_cenc_audio",
"container": "fmp4",
"elementaryStreams": ["es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "playready-cenc"
},
{
"key": "fmp4_playready_cbcs_video",
"container": "fmp4",
"elementaryStreams": ["es_video"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "playready-cbcs"
},
{
"key": "fmp4_playready_cbcs_audio",
"container": "fmp4",
"elementaryStreams": ["es_audio"],
"segmentSettings": {"segmentDuration": "2s"},
"encryptionId": "playready-cbcs"
}
],
"manifests": [
{
"key": "manifest_fairplay_hls",
"fileName": "manifest_fairplay.m3u8",
"type": "HLS",
"muxStreams": ["ts_fairplay"],
"maxSegmentCount": 10
},
{
"key": "manifest_widevine_cenc_hls",
"fileName": "manifest_widevine_cenc.m3u8",
"type": "HLS",
"muxStreams": ["fmp4_widevine_cenc_video", "fmp4_widevine_cenc_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_widevine_cbcs_hls",
"fileName": "manifest_widevine_cbcs.m3u8",
"type": "HLS",
"muxStreams": ["fmp4_widevine_cbcs_video", "fmp4_widevine_cbcs_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_widevine_cenc_dash",
"fileName": "manifest_widevine_cenc.mpd",
"type": "DASH",
"muxStreams": ["fmp4_widevine_cenc_video", "fmp4_widevine_cenc_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_widevine_cbcs_dash",
"fileName": "manifest_widevine_cbcs.mpd",
"type": "DASH",
"muxStreams": ["fmp4_widevine_cbcs_video", "fmp4_widevine_cbcs_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_playready_cenc_hls",
"fileName": "manifest_playready_cenc.m3u8",
"type": "HLS",
"muxStreams": ["fmp4_playready_cenc_video", "fmp4_playready_cenc_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_playready_cbcs_hls",
"fileName": "manifest_playready_cbcs.m3u8",
"type": "HLS",
"muxStreams": ["fmp4_playready_cbcs_video", "fmp4_playready_cbcs_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_playready_cenc_dash",
"fileName": "manifest_playready_cenc.mpd",
"type": "DASH",
"muxStreams": ["fmp4_playready_cenc_video", "fmp4_playready_cenc_audio"],
"maxSegmentCount": 10
},
{
"key": "manifest_playready_cbcs_dash",
"fileName": "manifest_playready_cbcs.mpd",
"type": "DASH",
"muxStreams": ["fmp4_playready_cbcs_video", "fmp4_playready_cbcs_audio"],
"maxSegmentCount": 10
}
]
Setelah mengetahui konfigurasi JSON yang ingin digunakan, buat saluran seperti biasa.
Mulai streaming
Setelah saluran dibuat, mulai saluran dan kirim stream input.
Saat channel dimulai, Live Stream API mengambil kunci enkripsi yang diidentifikasi oleh secretVersion
dari Secret Manager. Jika
Live Stream API tidak dapat mengambil kunci atau kunci dalam
format yang tidak dapat dikenali, status saluran akan menjadi STREAMING_ERROR
. Jika kunci
berhasil diambil, status saluran akan menjadi AWAITING_INPUT
seperti biasa.
Setelah streaming dimulai, Live Stream API akan mulai mengenkripsi konten output sesuai dengan konfigurasi yang diberikan pada waktu pembuatan.
Memantau output
Streaming output terenkripsi berisi manifes yang dimodifikasi dengan informasi yang diperlukan untuk mendekripsi konten untuk diputar.
Contoh manifes
Manifes berikut menampilkan informasi yang diperlukan untuk mendekripsi konten terkait.
HLS AES-128/ClearKey
#EXTM3U
#EXT-X-VERSION:7
#EXT-X-TARGETDURATION:4
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-KEY:METHOD=AES-128,URI="https://example.com/keys/3d9dccb479c64adbb6e514790caa7822.bin",IV=0x8d80aa741e7b32c2f1967daca83e81f3
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:22.870Z
#EXTINF:2.576778
segment-0000000000.ts
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:25.447Z
#EXTINF:2.000000
segment-0000000001.ts
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:27.447Z
#EXTINF:2.000000
segment-0000000002.ts
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:29.447Z
#EXTINF:2.000000
segment-0000000003.ts
HLS SAMPLE-AES/FairPlay
#EXTM3U
#EXT-X-VERSION:7
#EXT-X-TARGETDURATION:4
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-KEY:METHOD=SAMPLE-AES,URI="skd://d569cb35bd0548c7a99d92feb381df13",KEYFORMAT="com.apple.streamingkeydelivery",KEYFORMATVERSIONS="1"
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:22.870Z
#EXTINF:2.576778
segment-0000000000.ts
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:25.447Z
#EXTINF:2.000000
segment-0000000001.ts
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:27.447Z
#EXTINF:2.000000
segment-0000000002.ts
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:29.447Z
#EXTINF:2.000000
segment-0000000003.ts
HLS MPEG-CENC/Widevine
#EXTM3U
#EXT-X-VERSION:7
#EXT-X-TARGETDURATION:4
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,URI="data:text/plain;base64,AAAAOHBzc2gAAAAA7e+LqXnWSs6jyCfSEAB3Gcrj/8kFtioyiVbJMh9I49yVmwY=",KEYFORMAT="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed",KEYFORMATVERSIONS="1"
#EXT-X-MAP:URI="segment-initialization_segment_0000000000.m4s"
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:22.870Z
#EXTINF:2.576778
segment-0000000000.m4s
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:25.447Z
#EXTINF:2.000000
segment-0000000001.m4s
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:27.447Z
#EXTINF:2.000000
segment-0000000002.m4s
#EXT-X-PROGRAM-DATE-TIME:2022-10-12T20:08:29.447Z
#EXTINF:2.000000
segment-0000000003.m4s
DASH MPEG-CENC/Widevine
<AdaptationSet segmentAlignment="true" maxWidth="800" maxHeight="600">
<Representation mimeType="video/mp4" id="fmp4_widevine_cenc_video" codecs="avc1.4d001f">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="44ec248b-048c-43a6-a6ee-58a752c6f9f8"/>
<ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed" value="Widevine">
<cenc:pssh>AAAAOHBzc2gAAAAA7e+LqXnWSs6jCfc1R0h7QAAABgSEAB3Gcrj/8kFklokiVbJMh9VmwY=</cenc:pssh>
</ContentProtection>
</Representation>
</AdaptationSet>
<AdaptationSet segmentAlignment="true" mimeType="audio/mp4" id="1" label="fmp4_widevine_cenc_audio">
<Representation id="fmp4_widevine_cenc_audio" codecs="mp4a.40.2">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="44ec248b-048c-43a6-a6ee-58a752c6f9f8"/>
<ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed" value="Widevine">
<cenc:pssh>AAAAOHBzc2gAAAAA7e+LqXnWSs6jCfc1R0h7QAAABgSEAB3Gcrj/8kFklokiVbJMh9VmwY=</cenc:pssh>
</ContentProtection>
</Representation>
</AdaptationSet>
Rekomendasi pemain
Pemutar berdasarkan HLS.js
direkomendasikan
untuk dekripsi HLS/TS. Pemutar berdasarkan
Shaka Player direkomendasikan
untuk dekripsi DASH/fMP4.
Skema 'cenc' PlayReady didukung di komputer fisik yang menjalankan Windows 10 dengan browser Microsoft Edge, Xbox One (versi 1703 atau yang lebih lama), dan beberapa perangkat non-Windows (misalnya, smart TV). Skema 'cbcs' PlayReady hanya didukung di Xbox One versi 1709 atau yang lebih tinggi. Lihat Mode Enkripsi Konten PlayReady untuk mengetahui informasi selengkapnya.
Memperbarui kunci enkripsi
Untuk mengalihkan saluran ke kunci enkripsi baru, lakukan hal berikut:
- Hentikan channel.
- Perbarui setelan enkripsi di channel.
- Mulai channel.