HLS: Ignore unknown or unsupported system ID: 9A04F07998404286AB92E65BE0885F95

[xusuona]

Packager Command:

./packager-linux-x64 \
in=test.mp4,stream=video,output=test.video.mp4,drm_label=video,playlist_name='test.m3u8'  \
--enable_raw_key_encryption   \
--keys label=video:key_id=0B7H7DE341C74B3D88E35AFBD2BF0072:key=850RC88E356E35A00R7C962FE0052YU8   \
--protection_systems PlayReady  \
--hls_master_playlist_output master.m3u8 

What is the expected result?
Expect the Microsoft standard "ext-x-key" tag to appear in the generated test.m3u8, similar to

#EXTM3U
#EXT-X-VERSION:4
#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,KEYFORMAT="com.microsoft.playready",KEYFORMATVERSIONS="1",URI="data:text/plain;charset=UTF-16;base64,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"

What happens instead?
However, the following error was reported during operation:

[0103/145509:WARNING:simple_hls_notifier.cc(495)] HLS: Ignore unknown or unsupported system ID: 9A04F07998404286AB92E65BE0885F95

I would like to ask if shaka can support it, or if there are other ways. Thanks!

[joeyparrish]

Seems reasonable. Feel free to open a PR.

[joeyparrish]

Fixed in #1011