Enabling 4K playback with HEVC + Widevine based on Chrome version

[testeur-990]

Hello ,
We would like to enable 4K playback with HEVC + Widevine on browsers, but only when it is supported, based on the Chrome version.

After checking the Dash.js source code, I noticed that the player filters out tracks when the codec is not supported. Given this behavior, I would like to clarify:

• Does Dash.js already handle this case, especially considering that HEVC might not be supported in clear but could be supported when combined with Widevine?
  If not, what would be the best way to implement this logic?

Thank you in advance !

[dsilhavy]

Hello , We would like to enable 4K playback with HEVC + Widevine on browsers, but only when it is supported, based on the Chrome version.

After checking the Dash.js source code, I noticed that the player filters out tracks when the codec is not supported. Given this behavior, I would like to clarify:

• Does Dash.js already handle this case, especially considering that HEVC might not be supported in clear but could be supported when combined with Widevine?
  If not, what would be the best way to implement this logic?

Thank you in advance !

With v5 we use the Media Capabilities API to check codec/DRM support. See also

dash.js/src/streaming/utils/Capabilities.js

Line 320 in a656ec7

navigator.mediaCapabilities.decodingInfo(configuration)

If the device supports the Media Capabilities API dash.js checks for HEVC + Widevine if required. Otherwise we can not verify it prior to playback.