Is there any sample for nvmpi without ffmpeg?

[bmegli]

There are three possible contexts to understand this question:

Nvidia Multimedia API ("NVMPI", MMAPI)

jetson-ffmpeg really uses this Nvidia Jetson API

See examples by NVIDIA here:

• https://docs.nvidia.com/jetson/l4t-multimedia/group__l4t__mm__test__group.html

I will prepare you. The examples are much worse than you might expect ;-)

I would advise against using NVMPI directly:

• you tie your code to Jetson only
• you learn Jetson only technology

NVMPI is much broader than just encoding and decoding.

There may be some reasons why you would still want to use it directly.

jetson-ffmpeg nvmpi library

This is thin wrapper on Nvidia Multimedia API ("NVMPI") to enable integration with FFmpeg.

The nvmpi library name may be confusing in the context of Nvidia Multimedia API, and FFmpeg encoder/decoder nvmpi.

nvmpi is small library to just encode/decode in FFmpeg accessible way.

FFmpeg use in jetson_ffmpeg is kind of example use.

I would advise against using this layer directly:

• I don't think this interface was ever meant to be stable (not changing)
• you tie your code to Jetson only, unofficial and potentially unstable (in the sense changing) API

The FFmpeg decoder/encoder is called nvmpi (e.g. h264_nvmpi)

Nvidia FFmpeg "nvmpi"

There was/is decode only support for FFmpeg for Jetson by NVidia

This really calls the same Nvidia Multimedia API

You may see some trace in Nvidia docs.

The FFmpeg decoder is called nvmpi (e.g. h264_nvmpi)

On Nvidia forums sometimes nvmpi is used to describe Nvidia FFmpeg decoding.

[bmegli]

General recommendations

Access multimedia with FFmpeg or GStreamer (or any other abstraction).

• you don't tie your code with any hardware
• you learn technology applicable across OSes and hardware

Prefer CLI over writing code

• unless you have some specific need to tightly integrate with code
• use FFmpeg/GStreamer/... command line interface to stream/process video
  • most of the time you don't tie yourself to specific versions/hardware/codecs
  • doesn't need recompilation if you need to do major changes in the pipeline
  • will be easily understood by people "from the industry" (unlike custom code)
  • you learn industry standard technology on high level interface

[Kevin4ch]

thanks a lot, i'm using ffmeg now.