Media (Intel® oneAPI Video Processing Library, Intel Media SDK)
Access community support with transcoding, decoding, and encoding in applications using media tools from Intel. This includes Intel® oneAPI Video Processing Library and Intel® Media SDK.
Announcements
This community is designed for sharing of public information. Please do not share Intel or third-party confidential information here.

Limiting Max bit rate for LA_ICQ BRC

david123456
Beginner
191 Views

Hi,

We use QSV H.264 Encoder LA-ICQ BRC to stream live TV to net. It works well in LAN. But in internet, mosaic appeared when bps is high as user bandwidth limited.

How can we  limit Max bit rate less than 5Mbps under LA_ICQ BRC?

bps.JPG

0 Kudos
4 Replies
Jeffrey_M_Intel1
Employee
191 Views

There are two main groups of BRC algorithms in Media SDK.

  • Adjust quality to maintain a specified bitrate:CBR, VBR, Lookahead, AVBR
  • Allow bitrate to change to maintain a specified quality level: ICQ,LA_ICQ,QVBR

If you need to stay close to a specified bitrate, BRC modes from the first group may be a closer match for that task.  From the second group, only QVBR has a target bitrate setting.  It isn't available yet for Linux but you could prototype in Windows to see if it has the characteristics you're looking for.  Unless you need the lowest possible latency, lookahead BRC may be a good match for Linux.

david123456
Beginner
191 Views

Hi, Jeffrey

I have sent you a message

Alexey_F_Intel
Employee
191 Views

it is a hard problem to keep bitrate under control performing constant quality rate control. you may find interesting Google's YouTube research to predict CRF factor deploying NN http://www.streamingmedia.com/Articles/Editorial/Featured-Articles/Conference-Research-Tests-Adaptiv...

david123456
Beginner
191 Views

Hi, Alexey

Thanks for your providing paper about BRC.

If mediaSDK provides LA-ICQ setting at runtime(or based GOP), we can limit burst bitrate by adjusting ICQ value at next GOP. As net play has buffer to endure short time high burst biterate, this may overcome mosaic problem under bandwidth-limite net.

Of cause, intel providing LA-ICQ with maxkbps limiting is the best answer.

Reply