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Is there any way to control the maximum bitrate under fix QP mode?

Tracy lee
Expert 1505 points

Hi All:

          As we know DM365 H264/MPEG4 encode support CBR mode, fix QP mode...., is there any way to control the maximum bit rate under fix QP mode? What I want is:

1. Encode with a low bit rate for save the bandwidth/storage when the scene is simple.

2. When the scene is complex enough, I need encode can control the bit rate lower than the maximum bit rate (Quality can decrease under this case)

I know the DM365 support CVBR mode too, but it will close to the target bitrate in a long time, that means if the scene is simple, the encode bit rate still close to the target bit rate.

 

  • 0
    TI__Expert 8465 points

    Hi,

    In DM36x  H264 encoder we don't control to set lower bitrate for static scene. Rate Control always try to achieve target bitrate for static scenes. With CVBR mode we only have control to set higher bitrate for complex scene.One option you can use; set very low target bitrate and desired high bitrate for complex scenes.

    If you are not getting expected behavior with CVBR please reply the other thread we are discussing on this.

  • 0 in reply to Veeranna Hanchinal
    Expert 1505 points

    Hi Veeranna:

               Thanks for you response, what I want to know is wheather we can control the maximum bit rate under fix QP mode, nothing to do with the CVBR, so the answner is no for control the maximum bit rate under fix QP mode, right?

               BTW, I'm still trying the CVBR mode on DM365 and will replay another thread once I got update.