[FFmpeg-devel] Using decryption keys in a decoder

Michael Niedermayer michaelni
Tue Apr 7 16:21:15 CEST 2009

On Tue, Apr 07, 2009 at 11:20:03AM +0200, Maxim wrote:
> 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...

What kind of encryption does indeo5 use?

And is it correct that the binary decoder also needs these keys manually
provided by the user?

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Republics decline into democracies and democracies degenerate into
despotisms. -- Aristotle
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