> Now we'd like to put a protecting "watermark" on this stream. Just to > clarify: I don't mean a semi-transparent text over the video, but a > digital signature of the stream, which would verify its authenticity. > I know MS WMV format supports such a feature through special > watermarking DMOs, but as for standard mpeg4 video streams in standard > containers (avi, mp4 etc) - I haven't managed to find sufficient > information. > So I've got several questions: 1) Is it theoretically possible to add > such a signature to mpeg4 video - either in avi or any other > container? 2) Is it possible with libav* (with or without recoding the > original stream)? If yes, what APIs should I look at? 3) If I already > have a signature, is it possible somehow to store it along with the > stream, as a metadata?
If all the above is impossible, then what is the correct way to protect/verify the authenticity of the video in a container? _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
