I managed to extract 3 CDMs from my 2015 Moto Z Play (Android 9, Widevine 13), but none of them work with vdocipher. All with frida and dumper.

- First one I got running Bitmovin in Chrome
- Second one running app HBO Max
- Third one watching the vdocipher video I want in Chrome.

Each gave a different CDM. All three gave the following error:

{"code":2049,"message":"Authentication Failed"}

I'm pretty sure my CDMs are worthless.

So I ask: what is the preferred method (i.e which DRM app to run in Android) to extract CDMs?