DRM protected (Widevine) live stream freezes briefly when switching between different video bitrates

[hariszukanovic]

System info

Operating System: Debian 11.5 Shaka Packager Version: v2.6.1-634af65-release

Issue and steps to reproduce the problem

Packager Command: shaka-packager \ "input=udp://239.100.100.53:6000?reuse=1&interface=0.0.0.0&timeout=5000000,stream=video,stream_selector=0,bandwidth=500000,init_segment=variants/dash/cenc/v_r360p/init_v_r360p.m4s,segment_template=variants/dash/cenc/v_r360p/chunk_vr360p\$Number\$.m4s,output_format=mp4" \ "input=udp://239.100.100.53:6000?reuse=1&interface=0.0.0.0&timeout=5000000,stream=video,stream_selector=1,bandwidth=1800000,init_segment=variants/dash/cenc/v_r720p1/init_v_r720p1.m4s,segment_template=variants/dash/cenc/v_r720p1/chunk_vr720p1\$Number\$.m4s,output_format=mp4" \ "input=udp://239.100.100.53:6000?reuse=1&interface=0.0.0.0&timeout=5000000,stream=video,stream_selector=2,bandwidth=3800000,init_segment=variants/dash/cenc/v_r720p2/init_v_r720p2.m4s,segment_template=variants/dash/cenc/v_r720p2/chunk_vr720p2\$Number\$.m4s,output_format=mp4" \ "input=udp://239.100.100.53:6000?reuse=1&interface=0.0.0.0&timeout=5000000,stream=video,stream_selector=3,bandwidth=5000000,init_segment=variants/dash/cenc/v_r1080p/init_v_r1080p.m4s,segment_template=variants/dash/cenc/v_r1080p/chunk_vr1080p\$Number\$.m4s,output_format=mp4" \ "input=udp://239.100.100.53:6000?reuse=1&interface=0.0.0.0&timeout=5000000,stream=audio,language=eng,stream_selector=4,bandwidth=64000,init_segment=variants/dash/cenc/a_eng/init_a_eng.m4s,segment_template=variants/dash/cenc/a_eng/chunk_aeng\$Number\$.m4s,output_format=mp4" \ --single_segment=false \ --enable_raw_key_encryption \ --keys label=AUDIO:key_id=my_key_id:key=my_key,label=SD:key_id=my_key_id:key=my_key,label=HD:key_id=my_key_id:key=my_key,label=UHD:key_id=my_key_id:key=my_key \ --protection_systems Widevine,Playready \ --crypto_period_duration 0 \ --clear_lead 0 \ --segment_duration 10 \ --generate_dash_if_iop_compliant_mpd=1 \ --minimum_update_period 10 \ --time_shift_buffer_depth 60 \ --mpd_output cenc_manifest.mpd \ --profile live

What is the expected result? DRM protected (Widevine) live stream should play well using ExoPlayer

What happens instead?

The stream works but freezes briefly when switching between different video bitrates. The freeze seems to last as long as the chunk length, in this case, 10 seconds. The problem is 100% reproducible and present only when the stream is DRM protected! The clear stream does not have this problem. Tested with different Exo Player versions (2.9.6, 2.13, 2.18.1)...

Also, tested exactly the same scenario with shaka packager 1.6.1 (which we also use in some production environments) does not have this problem.

[hariszukanovic]

anyone?

[cosmin]

can you compare the output of 1.6.1 vs latest release in this case and see what might be different. Otherwise we'd probably need an input to reproduce this.

[github-actions[bot]]

Closing due to inactivity. If this is still an issue for you or if you have further questions, the OP can ask shaka-bot to reopen it by including @shaka-bot reopen in a comment.