[Offline playback DRM] Cannot playback with castlab DRM

[chinhbui]

Describe the bug
Playback offline fairplay drm cannot play

To Reproduce
#EXTM3U
#EXT-X-VERSION:7

Created with Broadpeak BkS350 Origin Packager(version=1.9.5)

#EXT-X-SESSION-KEY:METHOD=SAMPLE-AES,URI="skd://drmtoday?assetId=LetsEat3_T02_DRM_new&variantId=",KEYFORMAT="com.apple.streamingkeydelivery",KEYFORMATVERSIONS="1"

AUDIO groups

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio-aacl-128",NAME="Vietnamese",LANGUAGE="vi",AUTOSELECT=YES,DEFAULT=YES,CHANNELS="2"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio-aacl-128",NAME="Korean",LANGUAGE="ko",AUTOSELECT=YES,CHANNELS="2",URI="LetsEat3_T02-audio_kor=128000.m3u8"

variants

#EXT-X-STREAM-INF:BANDWIDTH=456000,CODECS="mp4a.40.2,avc1.4D4029",RESOLUTION=426x240,FRAME-RATE=30,AUDIO="audio-aacl-128",CLOSED-CAPTIONS=NONE
LetsEat3_T02-audio_vie=128000-video=301312.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=711000,CODECS="mp4a.40.2,avc1.4D4029",RESOLUTION=640x360,FRAME-RATE=30,AUDIO="audio-aacl-128",CLOSED-CAPTIONS=NONE
LetsEat3_T02-audio_vie=128000-video=541912.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1197000,CODECS="mp4a.40.2,avc1.4D4029",RESOLUTION=854x480,FRAME-RATE=30,AUDIO="audio-aacl-128",CLOSED-CAPTIONS=NONE
LetsEat3_T02-audio_vie=128000-video=1000440.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=2260000,CODECS="mp4a.40.2,avc1.4D4029",RESOLUTION=1280x720,FRAME-RATE=30,AUDIO="audio-aacl-128",CLOSED-CAPTIONS=NONE
LetsEat3_T02-audio_vie=128000-video=2003768.m3u8

keyframes

#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=40000,CODECS="avc1.4D4029",RESOLUTION=426x240,URI="keyframes/LetsEat3_T02-video=301312.m3u8"
#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=72000,CODECS="avc1.4D4029",RESOLUTION=640x360,URI="keyframes/LetsEat3_T02-video=541912.m3u8"
#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=133000,CODECS="avc1.4D4029",RESOLUTION=854x480,URI="keyframes/LetsEat3_T02-video=1000440.m3u8"
#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=266000,CODECS="avc1.4D4029",RESOLUTION=1280x720,URI="keyframes/LetsEat3_T02-video=2003768.m3u8"

Error on code
[VERBOSE] [::1:59255] ::1:59264 200 "GET /LetsEat3_T02_DRM_new/audio/cf954d982940d94245a683b8893a736b.ts" (356 | 105959)
2020-03-25 18:59:37.377 [Warning] [AVPlayerEngine+Observation.swift:90] onErrorLogEntryNotification(notification:) > error description: Optional("Segment exceeds specified bandwidth for variant"), error domain: CoreMediaErrorDomain, error code: -12318
[DEBUG] Did disconnect
[DEBUG] Did end background task
2020-03-25 18:59:49.276 [Warning] [AVPlayerEngine+Observation.swift:90] onErrorLogEntryNotification(notification:) > error description: Optional("crypt key received slowly"), error domain: CoreMediaErrorDomain, error code: -16833
2020-03-25 19:00:02.298 [Warning] [AVPlayerEngine+Observation.swift:90] onErrorLogEntryNotification(notification:) > error description: Optional("crypt key received slowly"), error domain: CoreMediaErrorDomain, error code: -16833
2020-03-25 19:00:15.340 [Debug] [AVPlayerEngine.swift:309]

Platform

• OS and version: [e.g. iOS 10.2, tvOS 11.0]
• Device type: [e.g. iPhone, iPad]
• Library version [3.11.0]

[noamtamim]

@chinhbui sorry for the delay in response. Did you resolve the issue?
If not, please first verify that the same content plays in online mode (using the same MyFairPlayLicenseProvider etc).
Second, the error "crypt key received slowly" means just that -- it took too much time (more than a few seconds) from the time the key was requested until it was provided. It happens a lot when debugging the license retrieval process.

[chinhbui]

Hi @noamtamim , �I guess problem here :
//#EXT-X-SESSION-KEY:METHOD=SAMPLE-AES,URI="skd://drmtoday?assetId=LetsEat3_T02_DRM_new&variantId=",KEYFORMAT="com.apple.streamingkeydelivery",KEYFORMATVERSIONS="1"
contentId of drmtoday is "skd://drmtoday?assetId=LetsEat3_T02_DRM_new&variantId=" , meanwhile playkit return contentId is "skd://LetsEat3_T02_DRM_new" .