November 28, 2021

NETINT encoder support in Nimble Streamer Transcoder via custom FFmpeg build

Live Transcoder for Nimble Streamer supports a number of encoding libraries off-the-shelf which cover most used technologies. Besides native integration with SDK and specific libraries, Live Transcoder uses some FFmpeg libraries for certain tasks. This way, Nimble allows using external libraries to extend its capabilities by re-building them with FFmpeg as necessary.

NETINT provides its hardware encoders API via FFmpeg-based libraries. This means you can make a custom FFmpeg build for Nimble Streamer and thus give it the access to NETINT encoding. Once you do that you'll be able to add it into your transcoder scenarios.

Let's see how you can accomplish that.

We assume you already have Live Transcoder installed and registered. In not, please check Transcoder installation instruction and watch introductory video tutorial from our playlist.
Before proceeding further, make sure you've upgraded your Nimble Streamer instance to the latest version.

First, you need to follow QuickStartGuideT408_T432_FW2_5.pdf documentation file:
  1. install necessary tools
  2. build libxcoder library
  3. check out FFmpeg 4.3.1
  4. apply Netint patch FFmpeg-n4.3.1_t4xx_patch
Second, the instruction says you need to run "bash", but instead of that you need to run this command:
bash --shared --custom_flags "--build-suffix=-nimble --disable-ffmpeg"
This will build shared libraries with Nimble suffix.

Third step is to run these commands from a regular instruction:
make install
sudo ldconfig
Finally, restart Nimble Streamer using a command for your OS as described here.

After that Nimble will be able to use the new libraries.

The encoder settings in transcoder scenario will need to use the following parameters:
  • Encoder must be set to FFmpeg
  • Codec must be set to h264_ni_enc 
  • Custom parameter xcoder-params will allow to control the encoder behavior
An example is shown here:

Once you save settings in your scenario, your Nimble Streamer instance will use NETINT encoder.

If you have any questions about custom FFmpeg builds and their integration with NETINT please contact our helpdesk.

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