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Re: ISO Mux expecting H.264 NALU or AnnexB? Started by kdixon at 06-17-2009 14:48. Topic has 7 replies. LEAD Support Fo... » Enduser » Multimedia Code... » Re: ISO Mux expecting H.264 NALU or AnnexB?

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06-17-2009, 14:48 kdixon Joined on 06-05-2009 Posts 16 ISO Mux expecting H.264 NALU or AnnexB? According to the documentation the ISO Mux is expecting an input type of MEDIATYPE_Video / MEDIASUBTYPE_avc1. 2 Questions: 1. Does MEDIASUBTYPE_avc1 (as shown in the docs) correspond to the FOURCC "avc1", e.g. GUID 31637661-0000-0010-8000-00AA00389B71 ? 2. Does the "avc1" FOURCC correspond to a H.264 NALU or AnnexB stream? I have seen other vendors using the FOURCC "AVC1" to represent NALU, and the FOURCC "H264" or "h264" to represent AnnexB. Does LEAD also follow this convention? So, what format of byte stream is the ISO Multiplexer expecting?    Report

06-18-2009, 14:07 Adnan Ismail Joined on 07-31-2006 Posts 2,047 Re: ISO Mux expecting H.264 NALU or AnnexB? Our ISO Mux can take input video with any of the following sub types: MEDIASUBTYPE_mp4v MEDIASUBTYPE_MP4V MEDIASUBTYPE_avc1 MEDIATYPE_ISOBASE ISOMEDIATYPE_mp4v From our own encoders, MEDIASUBTYPE_avc1 can be produced using our LEAD H264 Encoder. It can also produce the following sub types: MEDIASUBTYPE_L264 MEDIASUBTYPE_LX64 MEDIASUBTYPE_h264 ISOMEDIATYPE_avc1 If you choose MEDIASUBTYPE_h264, the output will have the standard FourCC of "h264". If you choose MEDIASUBTYPE_avc1, our encoder output will have the standard FourCC of "avc1". The MEDIASUBTYPE_L264 and MEDIASUBTYPE_LX64 will produce proprietary variations of the compression (fourCC "L264"), so don't use them if you want compatibility with non-LEAD codecs. Adnan Ismail LEADTOOLS Technical Support    Report

06-18-2009, 15:01 kdixon Joined on 06-05-2009 Posts 16 Re: ISO Mux expecting H.264 NALU or AnnexB? So if I select the input type for the ISO Multiplexer to be MEDIASUBTYPE_avc1, is it expecting an H.264 NALU stream or an H.264 Annex B byte stream?    Report

06-18-2009, 20:36 kdixon Joined on 06-05-2009 Posts 16 Re: ISO Mux expecting H.264 NALU or AnnexB? I tried several tests, using both our hardware H.264 encoders, and your own H.264 encoder. All were set to output avc1 format. When fed into the ISO Multiplexer, then connected to the File Writer filter from Microsoft, it creates files that do not work. VLC and QuickTime cannot play them. If I use MPEG4 instead of H.264, then VLC can play them if I make the extension .m4v. I need put H.264 in an MP4 container or 3GPP container. How would you advise I do this?    Report

06-21-2009, 11:24 Adnan Ismail Joined on 07-31-2006 Posts 2,047 Re: ISO Mux expecting H.264 NALU or AnnexB? You can generate 3GP files using our H263 encoder as explained in the last part of this help topic: http://www.leadtools.com/Help/LEADTOOLS/v16/Multimedia/Filters/Filters/LEADH263Encoder(2.0)_UI.htm About MP4, see this forum post: http://support.leadtools.com/SupportPortal/CS/forums/20614/ShowPost.aspx Adnan Ismail LEADTOOLS Technical Support    Report

06-23-2009, 17:59 kdixon Joined on 06-05-2009 Posts 16 Re: ISO Mux expecting H.264 NALU or AnnexB? The ISO Multiplexer seems to require an Annex B stream, and of course won't accept it unless the FourCC is "avc1"    Report

06-23-2009, 18:57 kdixon Joined on 06-05-2009 Posts 16 Re: ISO Mux expecting H.264 NALU or AnnexB? To correct my above comment: The ISO Multiplexer seems to require a NALU stream, and of course won't accept it unless the FourCC is "avc1"    Report

06-24-2009, 13:35 Adnan Ismail Joined on 07-31-2006 Posts 2,047 Re: ISO Mux expecting H.264 NALU or AnnexB? Our ISO Mux accepts types other than "avc1". If you have reason to believe the Mux or any other LEAD component is behaving incorrectly, please send an email to support@leadtools.com with details on how to reproduce the problem and verify it. Adnan Ismail LEADTOOLS Technical Support    Report

LEAD Support Fo... » Enduser » Multimedia Code... » Re: ISO Mux expecting H.264 NALU or AnnexB?

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