[Ffmpeg-devel] [PATCH] dumping support for encrypted MXFs

Reimar Döffinger Reimar.Doeffinger
Wed Jan 10 17:57:53 CET 2007

On Wed, Jan 10, 2007 at 03:55:48PM +0100, Reimar Doeffinger wrote:
> On Wed, Jan 10, 2007 at 01:45:55PM +0100, Baptiste Coudurier wrote:
> > Reimar D?ffinger wrote:
> > > attached patch would at least allow dumping of encrypted streams with
> > > MPlayer's -dumpvideo/-dumpaudio.
> > > This is not too useful and a bit hackish (since there is no indication
> > > whether we have an encrypted stream or not), but on the other hand it
> > > still seems like an improvement over the current treatment (mxf_read_header
> > > parses the file until EOF).

> > I would prefer to use mxf_encrypted_triplet_key like in specs, and it is
> > a complete key (16 bytes) according to specs.
> I'll search if the file contains any such key, but at least the dumped
> track does not contain any of the keys in that spec, I searched for
> them. If there is a mxf_encrypted_triplet_key somewhere I'll try to use
> that though.

I can confirm that my sample file does not contain the bytes
06 0e 2b 34 02 04 01 01
anywhere, thus no encrypted triplet.
Conversely, I could not find the byte sequence my patch looks for in any
of the specifications I currently have.
If you know of one that specifies this, please tell me.

Reimar D?ffinger

P.S.: it seems that mxfcrypt supports the file though.

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