Is it possible to implement different DRM keys for different resolutions in MPEG-DASH?

[Nixon197]

Hi, are there any developments regarding implementation of different DRM keys per resolution #1321

[erankor]

Nope :) that last comment in the issue you mentioned still applies.
Don't know if using multiple keys on a single set works well now across all different devices, it's been a long time since we tried it... But I don't think it's really needed, you can implement the solution so that there are 2 adaptive sets for each video - one with the higher resolution renditions that uses key X, and another with the lower resolutions only that uses key Y. In other words - the player always sees a single key, but the users who player the lower resolution stream won't get the key used in the playback of the higher resolutions.
What I probably would change however, if I had the time, is to make it easier to implement different keys for video / audio. The audio & video often use different decoding paths, and sharing the key between them is not recommended. Currently, using different keys for audio/video requires separating them to different sequences in the JSON, which can be cumbersome.
I implemented something like that in our live packager -
https://github.com/kaltura/media-framework/tree/master/nginx-pckg-module#pckg_enc_scope