CENC encryptor

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The CENC encryptor supports CENC, ISMA and Adobe encryption. It uses a DRM config file for declaring keys.
The syntax is available at https://wiki.gpac.io/xmlformats/Common-Encryption
The DRM config file can be set per PID using the property CryptInfo, or set at the filter level using cfile.
When the DRM config file is set per PID, the first CrypTrack in the DRM config file with the same ID is used, otherwise the first CrypTrack is used (regardless of the CrypTrack ID).
When the DRM config file is set globally (not per PID), the first CrypTrack in the DRM config file with the same ID is used, otherwise the first CrypTrack with ID 0 or not set is used.
If no DRM config file is defined for a given PID, this PID will not be encrypted, or an error will be thrown if allc is specified.

Options

cfile (str): crypt file location

allc (bool): throw error if no DRM config file is found for a PID

bk_stats (bool): print number of encrypted blocks to stdout upon exit

bk_skip (bool): skip encryption but performs all other tasks (test mode)