Encrypted streams were the primary driver, especially new proposed architectures where media is encrypted end-to-end with no decryption keys at switching mixers.
The codec must still have its own intra indication for internal use, since it can't rely on any system layer info like RTP headers. But it doesn't necessarily have to make this easy to parse for non-decoders if there are more efficient ways to signal this internally, while the system layer handles the job of providing easily parsed critical info. Mo On Mar 15, 2015, at 2:14 PM, Timothy B. Terriberry <[email protected]> wrote: Mo Zanaty (mzanaty) wrote: > Regarding indication of intra frames, draft-berger-avtext-framemarking > proposes a header extension for intra and other critical info for codec > agnostic switching. It will be discussed in avtext. Right, naturally most codecs include this up-front (in Daala it is the very first bit of the packet). But the other feedback I've received for MCUs is that it is often useful to know these things without decrypting the stream, which makes the header extension an attractive solution. Of course, if we know the header extension will be used, we can possibly avoid redundantly transmitting some of that data in the codec. _______________________________________________ video-codec mailing list [email protected] https://www.ietf.org/mailman/listinfo/video-codec _______________________________________________ video-codec mailing list [email protected] https://www.ietf.org/mailman/listinfo/video-codec
