23557 2013-10-18 00:20:05 +0000 Advise support of all options for SPS/PPS in ISO BMFF 2013-10-29 22:09:09 +0000 1 1 1 Unclassified HTML WG Media Source Extensions unspecified PC All RESOLVED FIXED P2 normal LC 1 watsonm acolwell acolwell bbcrdchris mike public-html-media public-html-bugzilla oldest_to_newest 94920 0 watsonm 2013-10-18 00:20:05 +0000 Section 12.2.1 has a note indicating that for "maximum interoperability" UAs are strongly advised to support the avc3/avc4 method in which SPS/PPS are included in band. Logically, for truely "maximum" interoperability, UA should support both methods and we should advise this. Replace: "For maximum content interoperability user agents are strongly advised to support avc3/avc4." With: "For maximum content interoperability, user agents are strongly advised to support both avc1/avc2 and avc3/avc4." 94953 1 acolwell 2013-10-18 20:10:26 +0000 Is avc4 the inline version of avc2? If so then I think we should remove the avc4 reference instead of adding avc2. It was never my intent to allow layered coding as the minimum bar for MP4 support. 95097 2 watsonm 2013-10-22 15:47:52 +0000 There are two orthogonal issues: (1) supported positions of the SPS/PPS (2) support for Aggregators and Extractor pseudo-NAL units For (1) we are talking about whether the note should include avc1/avc2 as well as avc3/avc4. My original proposal is to include both options in the note. For (2) we are talking about whether we should mention avc2 and avc4 at all. I think the original intention is that we do not say anything about (2), but the text in the note inadvertantly 'recommends's support of avc4, We could address my comment and retain 'no comment' on (2) by re-wording the note as follows: "For maximum content interoperability, user agents are strongly advised to support both locations for storage of the SPS and PPS." 95498 3 acolwell 2013-10-29 00:09:37 +0000 CC'ing Chris Poole so he can comment. He was the one pushing for the original text. 95499 4 acolwell 2013-10-29 00:12:33 +0000 (In reply to Mark Watson from comment #2) > We could address my comment and retain 'no comment' on (2) by re-wording the > note as follows: > > "For maximum content interoperability, user agents are strongly advised to > support both locations for storage of the SPS and PPS." I support this wording or with this minor edit. s/both locations for/inband and out-of-band/ 95513 5 bbcrdchris 2013-10-29 12:02:57 +0000 I'm happy with that change. I'd perhaps suggest leaving the word both in there so that it reads: "For maximum content interoperability, user agents are strongly advised to support both inband and out-of-band storage of the SPS and PPS." 95516 6 watsonm 2013-10-29 14:40:38 +0000 Works for me. 95517 7 acolwell 2013-10-29 14:45:09 +0000 Wonderful. Thank you both. :) I'll land the change later today. 95528 8 acolwell 2013-10-29 22:09:09 +0000 Change committed https://dvcs.w3.org/hg/html-media/rev/15e7e8f7eecd