Understand NAL Unit of h.264 stream

Question

NAL Units start code: 00 00 00 01 X Y

X = IDR Picture NAL Units (25, 45, 65)

X = Non IDR Picture NAL Units (01, 21, 41, 61) ; 01 = b-frames, 41 = p-frames

What does 61 mean?

possible duplicate of [Non IDR Picture NAL Units - 0x21 and 0x61 meaning](http://stackoverflow.com/questions/22551325/non-idr-picture-nal-units-0x21-and-0x61-meaning) — Roman R., Mar 28 '14 at 12:33

score 1 · Answer 1 · edited May 23 '17 at 12:16

1

"01 = b-frames, 41 = p-frames" this is incorrect
Specification is available online for free: http://www.itu.int/rec/T-REC-H.264
Similar question was here just a few days ago: Non IDR Picture NAL Units - 0x21 and 0x61 meaning

edited May 23 '17 at 12:16

Community

answered Mar 28 '14 at 12:33

Roman R.

1 Answers1