[FFmpeg-devel] Using decryption keys in a decoder

[Maxim]

Hello guys,

I need to specify a decryption key for some Indeo5 video clips in order
to play them back. The indeo5 keys are just numbers used to perform
frame data encryption. I know about the FFmpeg's ability to specify keys
for file formats but how it's about decoders?
Please give me an example how such keys could be specified and retrieved
by a decoder...

Regards
Maxim