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llx
Beginner
91 Views

NAL size for H264 baseline

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

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3 Replies
Vladimir_Dudnik
Employee
91 Views

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

llx
Beginner
91 Views

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

llx
Beginner
91 Views

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

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