v1.5.1

• Supported Serve API: v1.4.3 or newer

Added

• Support for big-int Key IDs in PSSH. All integer values are converted to a UUID and are loaded big-endian.
• Import path shortcuts in the __init__.py package constructor to all the user classes.
  • Now you can do e.g., from pywidevine import PSSH instead of from pywidevine.pssh import PSSH.
  • You can still do it the full direct way if you want.
• Parsing check to the raw DrmCertificate in Cdm.set_service_certificate().

Changed

• Service Certificates are now stored in the session as a SignedDrmCertificate.
  • This is to keep the signature with the Certificate, without wrapping it in a SignedMessage unnecessarily.
• Reduced the maximum concurrent Cdm sessions from 50 to 16 as it seems to be a more common limit on more up-to-date
  devices and versions of OEMCrypto. This also helps encourage people to close their sessions when they are no longer
  required.

Fixed

• Acquisition of the Certificate's provider_id in Cdm.set_service_certificate() in some edge cases, but also when you
  try to remove the certificate by setting it to None.
• When exporting a PSSH object it will now do so in the same version it was initially loaded or created in. Previously
  it would always dump as a v1 PSSH box due to a cascading check in pymp4. It now also honors the currently set version
  in the case it gets overridden.
• Improved reliability of computing License Signatures by verifying the signature against the original raw License
  message instead of the re-serialized version of the message.
  • Some license messages when parsed would be slightly different when re-serialized against my protobuf, therefore the
    computed signature would have always mismatched.