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<blockquote data-quote="mm1352000" data-source="post: 1112058" data-attributes="member: 82144">Yes, the ISO standards for MPEG program (ISO/IEC 11172 part 1) and transport streams (ISO/IEC 13818 part 1), and also the ISO standards for video encoding (eg. MPEG 1 = ISO/IEC 11172 part 2, MPEG 2 = ISO/IEC 13818 part 2, h.264/AVC = ISO/IEC 14496 part 10 etc.) describe it. Unfortunately those standards are not freely available.You can see an example of sequence header parsing in code that I wrote for the TsMuxer here:<a href="https://github.com/MediaPortal/MediaPortal-1/blob/EXP-TVE3.5-MP1-MP2_mm_working/DirectShowFilters/TsMuxer/source/TsMuxer.cpp#L1649" target="_blank">https://github.com/MediaPortal/MediaPortal-1/blob/EXP-TVE3.5-MP1-MP2_mm_working/DirectShowFilters/TsMuxer/source/TsMuxer.cpp#L1649</a>You can see the aspect ratio is included there... though in that case, not with the same detail as WSS, which allows you to specify that the content aspect ratio is different to the video aspect ratio.Note the above code only handles MPEG 1 and 2.</blockquote>

[QUOTE="mm1352000, post: 1112058, member: 82144"] Yes, the ISO standards for MPEG program (ISO/IEC 11172 part 1) and transport streams (ISO/IEC 13818 part 1), and also the ISO standards for video encoding (eg. MPEG 1 = ISO/IEC 11172 part 2, MPEG 2 = ISO/IEC 13818 part 2, h.264/AVC = ISO/IEC 14496 part 10 etc.) describe it. Unfortunately those standards are not freely available. You can see an example of sequence header parsing in code that I wrote for the TsMuxer here: [url]https://github.com/MediaPortal/MediaPortal-1/blob/EXP-TVE3.5-MP1-MP2_mm_working/DirectShowFilters/TsMuxer/source/TsMuxer.cpp#L1649[/url] You can see the aspect ratio is included there... though in that case, not with the same detail as WSS, which allows you to specify that the content aspect ratio is different to the video aspect ratio. Note the above code only handles MPEG 1 and 2. [/QUOTE]

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