Baptiste Coudurier <baptiste.coudurier@smartjog.com> writes:
Måns Rullgård wrote:
Michael Niedermayer <michaelni@gmx.at> writes:
Hi
On Mon, Jul 17, 2006 at 01:09:37AM +0100, Måns Rullgård wrote:
michael <subversion@mplayerhq.hu> writes:
Note, this is the same format these codecs use in matroska + for H.264 the NAL units MUST be formated as in a bytestream + (with 00 00 01 prefixes)
It's actually 00 00 00 01 (four bytes) for the NAL units that we're dealing with here. To make this unambiguous, I would change the text to read
For H.264 the format MUST be that specified in ITU-T Rec. H.264 Annex B Byte stream format. agree, but we should still mention that its 0 0 0 1 + NAL as not every reader of nut.txt will have (or want) every spec of every codec ...
Fine by me. I just want the proper reference included for those that do have the document.
Actually, some NALs (PPS, SPS ?) can start with 00 00 01 IIRC.
Actually, it's the opposite. Quote from the spec: When any of the following conditions are fulfilled, the zero_byte syntax element shall be present. - the nal_unit_type within the nal_unit( ) is equal to 7 (sequence parameter set) or 8 (picture parameter set) - the byte stream NAL unit syntax structure contains the first NAL unit of an access unit in decoding order, as specified by subclause 7.4.1.2.3. -- Måns Rullgård mru@inprovide.com