Those who has worked deeply with FFMPEG should know the answer of my question. My question is that : how the software find I-Frame by parsing bit-stream of the input video. Can the software( FFMPEG, X264) can differentiate IDR and non IDR I-Frames? Probably yes, in that case what's the starting word bit stream of these two type of I-Frames? Some people believe that IDR I-Frames starting bit stream is 00 00 00 01 y in hex which (y=25, 45, 65). Are you agree with this? According to H.264 standard chapter 7 and annex B, The three byte start code bit-stream 00 00 01 is correct for starting VCL NAL units. But the one Byte header which start with 0, the rest of 7 bits can not be 0 if the picture is IDR. I confused, please somebody advise.
-- Amir H. Rouhi PhD Student/ CSIT RMIT University Room: 14-09-04 [email protected] [email protected]
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