Controle the encoding bitrate using ovxio::creatVideoRender on jetson nano

Robotics & Edge Computing Jetson Systems Jetson Nano
1

Hey ,everyone

I have some issue, when i try to modify the default parametres of ovxio::creatVideoRender().
I want to controle the encoding in order to use jetson nano chips for H265 encoding and adjuste the quality by modifing the bitrate.

Until now i found the function getVideoBitrate()

int getVideoBitrate()
{
    if (const char * const fromEnv = ::getenv("NVXIO_VIDEO_RENDER_BITRATE")) try
    {
        return std::max(std::stoi(fromEnv), 0);
    }
    catch (...)
    {
        return 0;
    }
    return -1;
}
``` from : GStreamerVideoRenderImpl.cpp (https://bigfoot.cs.unc.edu:3000/otternes/cuda_scheduling_examiner/src/bdd6c707bc1139c37ea09331f0cee926f01b85bd/src/third_party/VisionWorks-1.6-Demos/nvxio/src/NVX/Render/GStreamer/GStreamerVideoRenderImpl.cpp) 

When i call this function the result optained is -1. 

What I aspect is to  use  setenv( "NVXIO_VIDEO_RENDER_BITRATE", "10",1)  like that i ordert to have an Bitrate at 10mb/s for exemple. 
unforgetly isn't so easy that doesn't work. 

Please someone have clue to control the bit rate and the encoding  nvxio_render?
3

Hi,
Do you use VisionWorks1.6? We don’t have existing implementation in it. You may check the source code and add the function.

We would suggest you try jetson_multimedia_api or gstreamer. Please refer to the documents:
https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%2520Linux%2520Driver%2520Package%2520Development%2520Guide%2Faccelerated_gstreamer.html%23
https://docs.nvidia.com/jetson/l4t-multimedia/index.html

For running deep learning inference, please check DeepStream SDK.
https://forums.developer.nvidia.com/t/announcing-developer-preview-for-deepstream-5-0/121619

4

Thanks for your answer but honestly i don’t see that realy helpfull.

5

Hi,
Please check

VisionWorks-1.6-Samples/nvxio/include/NVX/Render.hpp: * Use `NVXIO_VIDEO_RENDER_BITRATE` environment variable to specify the target video bitrate in bit/s.

You can set environment variable to control it.

$ export NVXIO_VIDEO_RENDER_BITRATE=4000000