On Tue, Sep 24, 2013 at 6:14 PM, Houle, Elijah Js <[email protected]> wrote: > I'd like to implement the encryption algorithm from this paper > (www.cs.purdue.edu/homes/bb/security99.ps), where only the sign bits for the > DC/AC coefficients are selected and encrypted. This requires selecting bits > in a zigzag order from each block (Y1, Y2, Y3, Y4, Cb, Cr). Not wanting to > write an MPEG-1 encoder from scratch, my first thought was to modify the > mpeg12enc.c file, but I can't figure out whether/where it distinguishes among > the different blocks of the macroblock, especially because I'm unfamiliar > with some of the terminology implicit in the variable names. Am I close to > the right track, or is there a better approach? >
please try the ffmpeg-devel list as your question seems to be about extending/modifying the core functionality of ffmpeg rather than building an application using its libs. _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
