topic NAL size for H264 baseline in Intel® Integrated Performance Primitives

NAL size for H264 baseline

llx — Wed, 05 Mar 2008 20:39:38 GMT

Hi,

Some client support one NAL per packet (1460bytes per RTP packet) mode only. When I try to encode a QCIF sequence, the firstNAL is 2112 bytes: much bigger than 1460bytes. This will also causea packet burst that willbe blocked by some gateways in the low bit-rate network. How do I control the NAL size and I-framein umc_video_enc_con?

Thanks.

llx

Re: NAL size for H264 baseline

Vladimir_Dudnik — Mon, 24 Mar 2008 20:55:31 GMT

That might be something like adaptive increasing quant parameter untill you met compressed frame size requirements

This is not demostrated in umc_video_enc_con application

Regards,
Vladimir

Re: NAL size for H264 baseline

llx — Wed, 26 Mar 2008 17:11:15 GMT

Hi Vladimir,

Do you have some examples of that? Or would you refer me to the document that I can follow? This is a mandatory feature because many H264 clients especially the phones has restriction on this. Thank you very much.

llx

Re: NAL size for H264 baseline

llx — Sun, 13 Apr 2008 18:10:44 GMT

Can an Iframe be divided to several slices? In this way, the NAL size will be limited.

How could I do that in umc_video_enc_con? Thanks.

llx