Partial encrypted->clear test file.
requested to merge chturne/gst-integration-testsuites:fix-caps-change-partial-encryption into master
This is a fragmented MP4 file that transitions from an encrypted stream to a clear one. If a caps change happens, moving from application/x-cenc to video/x-h264, the pipeline must somehow remove the decryptor and use just a decoder. This currently isn't supported. Instead, once a stream has been detected as encrypted, and a decryptor has been plugged, it should remain that way forever-more, the decryptor will need to check whether the buffers passing through it have protection meta, and if they don't, it should act like identity.