how to use set parameters for keeping max bitrate under the moving picture

hb chen

Dear Experts,

We are using DM8148/DVR_RDK 3.5/REL. 500.V.H264AVC.E.IVAHD.02.00.04.01. VBR mode.

I review some topic in this forum about how to bound bitrate.

We tried those parameters:

HRDBufferSize/qp value/numSkipInDistributionWindow/skipDistributionWindowLength/enablePartialFrameSkip/allowFrameSkip

The most efficient way is to use "enablePartialFrameSkip" to control bitrate under maximum bitrate.

But the video quality is bad that our customer cannot accept it. (We modified qpmax to 51)

We have to control bitrate under maximum bitrate.

Will CVBR/HF-VBR have better result?

Is there any other parameter could be used to control bitrate? (Hope have better video quality than partialFrameSkip)

or How to combine those parameter to achieve best quality and lowest bitrate?

thx ~

0 Margarita Gashova over 10 years ago

Hello,

You could try this e2e forum thread.

I assume that the params should be the same as for DVRRDK.

Check the attached file it is for the encode demo in EZSDK but you could find the encoder's settings for CBR at 500kb/s and 5000kb/s.

Hope this helps.

Best Regards,

Margarita

0 hb chen over 10 years ago in reply to Margarita Gashova

Expert 2640 points

Dear Margarita Gashova,

Our customer cannot accept using partialFrameSkip to bound bit rate.

The video quality of partialFrameSkip is bad if target bit rate is low and high active content.

Is there any other method could be used to bound bit rate strictly? (Hope can also keep better quality)

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