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How do you tell a MPEG-1 bitstream from a MPEG-2 bitstream?

April 26, 2017bitstream mpeg-1 MPEG-2

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How do you tell a MPEG-1 bitstream from a MPEG-2 bitstream?

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A. All MPEG-2 bitstreams must contain specific extension headers that *immediately* follow MPEG-1 headers. At the highest layer, for example, the MPEG-1 style sequence_header() is followed by sequence_extension() exclusive to MPEG-2. Some extension headers are specific to MPEG-2 profiles. For example, sequence_scalable_extension() is not allowed in Main Profile bitstreams. A simple program need only scan the coded bitstream for byte-aligned start codes to determine whether the stream is MPEG-1 or MPEG-2.