Get few seconds black screen when switching to empty mid roll with DRM protected video

[z423821123]

[REQUIRED] Issue description

Playing DRM protected video in empty mid roll will appear about 1 seconds black screen. It's easy to reproduce in demo app.

[REQUIRED] Reproduction steps

1. Add this ads tag uri "https://vastsynthesizer.appspot.com/empty-midroll-2" info DRM protected video in demo app

"name": "Widevine DASH (MP4, H264)",
    "samples": [
      {
        "name": "HD (cenc)",
        "uri": "https://storage.googleapis.com/wvmedia/cenc/h264/tears/tears.mpd",
        "drm_scheme": "widevine",
        "drm_license_uri": "https://proxy.uat.widevine.com/proxy?provider=widevine_test",
        "ad_tag_uri": "https://vastsynthesizer.appspot.com/empty-midroll-2"
      },
      {
        "name": "UHD (cenc)",
        "uri": "https://storage.googleapis.com/wvmedia/cenc/h264/tears/tears_uhd.mpd",
        "drm_scheme": "widevine",
        "drm_license_uri": "https://proxy.uat.widevine.com/proxy?provider=widevine_test"
      },
      {
        "name": "HD (cbcs)",
        "uri": "https://storage.googleapis.com/wvmedia/cbcs/h264/tears/tears_aes_cbcs.mpd",
        "drm_scheme": "widevine",
        "drm_license_uri": "https://proxy.uat.widevine.com/proxy?provider=widevine_test"
      },
      {
        "name": "UHD (cbcs)",
        "uri": "https://storage.googleapis.com/wvmedia/cbcs/h264/tears/tears_aes_cbcs_uhd.mpd",
        "drm_scheme": "widevine",
        "drm_license_uri": "https://proxy.uat.widevine.com/proxy?provider=widevine_test"
      },
      {
        "name": "Secure -> Clear -> Secure (cenc)",
        "uri": "https://storage.googleapis.com/exoplayer-test-media-1/widevine/tears_enc_clear_enc.mpd",
        "drm_scheme": "widevine",
        "drm_license_uri": "https://proxy.uat.widevine.com/proxy?provider=widevine_test",
        "drm_session_for_clear_content": true
      }
    ]
  }

2.Click HD(cenc)

3.Found that frame become black about 1 seconds with the second empty mid roll

[REQUIRED] Version

2.13.0

[REQUIRED] Device

Samsung Galaxy S10, Android 10

[icbaker]

I can't reproduce what you're seeing with a Pixel 3a XL.

However I suspect it might be related to switching between secure and clear decoders. Can you try adding "drm_session_for_clear_content": true to the same JSON snippet and see what happens?

{
  "name": "HD (cenc)",
  "uri": "https://storage.googleapis.com/wvmedia/cenc/h264/tears/tears.mpd",
  "drm_scheme": "widevine",
  "drm_license_uri": "https://proxy.uat.widevine.com/proxy?provider=widevine_test",
  "ad_tag_uri": "https://vastsynthesizer.appspot.com/empty-midroll-2",
  "drm_session_for_clear_content": true
},

More info: https://exoplayer.dev/drm.html#drm-sessions-for-clear-content

[z423821123]

Still reproduce in demo app when I adding "drm_session_for_clear_content": true to the JSON. I will email the attachment to dev.exoplayer@gmail.com

[icbaker]

Thanks for trying that - sorry it didn't work. I took a closer look and realised the drm_session_for_clear_content flag isn't properly propagated all the way down when using the MediaItem API. I've sent a change to fix that.

I determined I couldn't reproduce because the symptom is device specific - a colleague was able to reproduce with their Samsung device.