H264 encoder I frame start code problem

Intel® Integrated Performance Primitives

Deliberate problems developing high-performance vision, signal, security, and storage applications.

H264 encoder I frame start code problem

419 Views

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

Link Copied

0 Replies

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.