[Mp4-tech] BitRate

[ee09176 student.estg.ipleiria.pt]

Hi Ramirez,
I suggest you to use the latest release JM10.1.
The config used by you seems to be right (but I never tried use rate control).
I heard that the rate control has some problems to stabilize the bitrate, try 
to encode a bigger sequence (>100 frames).
Good luck...
Sandro
On Wednesday 21 December 2023 14:31, ramirez alejandro wrote:
>   Dear all,
>
>   I am trying to do some experiments using the JM-9.5 H.264 software
> reference for baseline and main profiles for different bit rate values
> (10kbps, 64kbps, 128kbps, 768kbps and 2Mbps) . For that I am coding some
> test sequences (qcif, cif) using the reference encoder.
>
>   In special I want to know how can I control the bit rate?
>
>   What I did is :
>   In the bin’s directory of the software JM, there are two files called
> encoder_baseline.cfg and encoder_main.cfg.
>
>   In the section under Rate Control,
>
>   I changed the parameters value:
>
>   RateControlEnable    =      1   # 0 Disable, 1 Enable
>   Bitrate              =  768000   # Bitrate(bps)
>   InitialQP            =     24
>
>   For the bitrate parameter I tried for 10kbps,64kbps,128kbps,768kbps and
> 2Mbps. In all the cases the Bitrate wasn’t respected.  (stats.dat) for
> example: For this bitrate:
>   Bitrate              =  10000   # Bitrate(bps)
>   In the stats.dat I had:
>   Freq. for encoded bitstream  :   10
>   Total Bitrate(kb/s)          :  24.29
>
>   I will appreciate if some one can give me some examples about the
> configure file (.cfg) or some comments about it.
>
>   Thank you very much!
>
>
>   Alejandro
>
> Note : I checked JVT-0017.doc and JVT-0079.doc
>
>
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