Plugin used for integrating OpenCDM's decryption capabilities into gstreamer.
In order to build and succesfully run the plugin, you'll need the following:
- Gstreamer > 1.10,
- CURL > 7.61,
- DRM library (widevine, playready),
- RDKServices (OpenCDM), ThunderClientLibraries (ocdm) - if you decide to use the ocdm implementation.
There are already premade build recipes for Yocto and Buildroot, that will allow you to integrate this package onto your platform.
When building in a different environment, rules for a normal cmake package apply. If you're extending the IGstDecryptor.h interface, make sure to set the cmake flag GSTCENCDECRYPT_IMPLEMENTATION, to an approriate value.
This application is meant to be a convenience tool, that helps you with debugging encrypted stream issues outside of a browser environment. It has fixed capabilities of processing application/x-cenc and application/x-webm-enc assets that contain streams of the following types. It'll handle GstCaps negotiation and in-place transformation of the incoming GstBuffer structures.
Since there's no application layer that provides a license URL for the content, you'll have to set it yourself via the OVERRIDE_LA_URL environment variable.
Depending on the keysystem, there are two reliable sources for encrypted assets:
- Playready - It's best to use the official Microsoft's test site. Keep in mind that (at the time of writing), not all of the assets are supported, specifically with WRMHEADER version > 4.0.
- Widevine - It's best to use the Youtube certification test asset package. You'll be able to download them from the Download-Media-files section. You'll also need to piece together a correct license URL. The app from Download-source section will contain a base URL in
lib/eme/licenseManager.jsand asset specific query parameters inyts.js.
You can also create your own encrypted sample files, using tools like shaka-packager.
The application/x-webm-enc samples do not have specific keysystem information attached to them. Due to this, Widevine will be selected as the preferable option for webm files. You can override this behavior by setting the OVERRIDE_WEBM_KEYSYSTEM_UUID environment variable.
