H264 encoder I frame start code problem

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H264 encoder I frame start code problem

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Hello all,

When I set both# of frames in between I frames and IDR interval to 30,

all frames are starting with code 0,0,0,1,0X21, which means P frame.

I am using mediadata object which is filled by MPEG4Decoder.GetFrame method.

And when I check encoded output frame with

encDataOut.GetFrameType() == UMC::FrameType::I_PICTURE

it returns true at every 30th frame. But why all frames are starting with 0X21, even if it is I frame ?
Shouldn't I frames start with 0X25

Many thanks

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