Raw key

Packager allows encrypting contents with raw key.

Synopsis

$ packager <stream_descriptor> ... \
  --enable_raw_key_encryption \
  --keys <key_info_string>[,<key_info_string>]... \
  [--pssh <concatenated_PSSHs>] \
  [Other options, e.g. DASH options, HLS options]

key_info_string is of the form:

label=<label>:key_id=<key_id>:key=<key>

Custom PSSH(s) can be provided in –pssh. If absent, v1 common PSSH box is generated.

Examples

The examples below uses the H264 streams created in Media Encoding. Here are examples with DASH. It can be applied to HLS in a similar way.

Common PSSH (one key for all streams):

$ packager \
  in=h264_baseline_360p_600.mp4,stream=audio,output=audio.mp4 \
  in=h264_baseline_360p_600.mp4,stream=video,output=h264_360p.mp4 \
  in=h264_main_480p_1000.mp4,stream=video,output=h264_480p.mp4 \
  in=h264_main_720p_3000.mp4,stream=video,output=h264_720p.mp4 \
  in=h264_high_1080p_6000.mp4,stream=video,output=h264_1080p.mp4 \
  --enable_raw_key_encryption \
  --keys label=:key_id=abba271e8bcf552bbd2e86a434a9a5d9:key=69eaa802a6763af979e8d1940fb88392 \
  --mpd_output h264.mpd

Common PSSH (different keys for different streams):

$ packager \
  in=h264_baseline_360p_600.mp4,stream=audio,output=audio.mp4,drm_label=AUDIO \
  in=h264_baseline_360p_600.mp4,stream=video,output=h264_360p.mp4,drm_label=SD \
  in=h264_main_480p_1000.mp4,stream=video,output=h264_480p.mp4,drm_label=SD \
  in=h264_main_720p_3000.mp4,stream=video,output=h264_720p.mp4,drm_label=HD \
  in=h264_high_1080p_6000.mp4,stream=video,output=h264_1080p.mp4,drm_label=HD \
  --enable_raw_key_encryption \
  --keys label=AUDIO:key_id=f3c5e0361e6654b28f8049c778b23946:key=a4631a153a443df9eed0593043db7519,label=SD:key_id=abba271e8bcf552bbd2e86a434a9a5d9:key=69eaa802a6763af979e8d1940fb88392,label=HD:key_id=6d76f25cb17f5e16b8eaef6bbf582d8e:key=cb541084c99731aef4fff74500c12ead \
  --mpd_output h264.mpd

Widevine PSSH (different keys for different streams):

$ packager \
  in=h264_baseline_360p_600.mp4,stream=audio,output=audio.mp4,drm_label=AUDIO \
  in=h264_baseline_360p_600.mp4,stream=video,output=h264_360p.mp4,drm_label=SD \
  in=h264_main_480p_1000.mp4,stream=video,output=h264_480p.mp4,drm_label=SD \
  in=h264_main_720p_3000.mp4,stream=video,output=h264_720p.mp4,drm_label=HD \
  in=h264_high_1080p_6000.mp4,stream=video,output=h264_1080p.mp4,drm_label=HD \
  --enable_raw_key_encryption \
  --keys label=AUDIO:key_id=f3c5e0361e6654b28f8049c778b23946:key=a4631a153a443df9eed0593043db7519,label=SD:key_id=abba271e8bcf552bbd2e86a434a9a5d9:key=69eaa802a6763af979e8d1940fb88392,label=HD:key_id=6d76f25cb17f5e16b8eaef6bbf582d8e:key=cb541084c99731aef4fff74500c12ead \
  --pssh 000000407073736800000000edef8ba979d64acea3c827dcd51d21ed000000201a0d7769646576696e655f74657374220f7465737420636f6e74656e74206964 \
  --mpd_output h264.mpd

Refer to player setup on how to config the DRM in Shaka Player.

Test vectors used in this tutorial

Key ID:
SD: abba271e8bcf552bbd2e86a434a9a5d9
HD: 6d76f25cb17f5e16b8eaef6bbf582d8e
AUDIO: f3c5e0361e6654b28f8049c778b23946

Key ID must be 16 bytes or 32 digits in HEX.
Key:
SD: 69eaa802a6763af979e8d1940fb88392
HD: cb541084c99731aef4fff74500c12ead
AUDIO: a4631a153a443df9eed0593043db7519

Key must be 16 bytes or 32 digits in HEX.
Widevine PSSH:

000000407073736800000000edef8ba979d64acea3c827dcd51d21ed000000201a0d7769646576696e655f74657374220f7465737420636f6e74656e74206964

The PSSH is generated using pssh-box script:

$ pssh-box.py --widevine-system-id \
  --content-id 7465737420636f6e74656e74206964 --provider widevine_test

General encryption options

--protection_scheme <scheme>
 Specify a protection scheme, ‘cenc’ or ‘cbc1’ or pattern-based protection schemes ‘cens’ or ‘cbcs’.
--vp9_subsample_encryption, --novp9_subsample_encryption
 Enable / disable VP9 subsample encryption. Enabled by default.
--clear_lead <seconds>
 Clear lead in seconds if encryption is enabled.

Raw key encryption options

--enable_raw_key_encryption
 Enable encryption with raw key (keys provided in command line)).
--enable_raw_key_decryption
 Enable decryption with raw key (keys provided in command line).
--keys <key_info_string[,key_info_string][,key_info_string]…>
 

key_info_string is of the form:

label=<label>:key_id=<key_id>:key=<key>

label can be an arbitrary string or a predefined DRM label like AUDIO, SD, HD, etc. Label with an empty string indicates the default key and key_id. The drm_label in Stream descriptors, which can be implicit, determines which key info is applied to the stream by matching the drm_label with the label in key info.

key_id and key should be 32-digit hex strings.

--iv <16-digit or 32-digit hex string>
 IV in hex string format. If not specified, a random IV will be generated. This flag should only be used for testing. IV must be either 8 bytes (16 digits HEX) or 16 bytes (32 digits in HEX).
--pssh <hex string>
 One or more concatenated PSSH boxes in hex string format. If not specified, a v1 common PSSH box will be generated.