[FFmpeg-user] FFMPEG not using GPU/CUDA

[Mahmood Naderan]

Hi,
I have built FFMPEG from source on an Ubuntu 18.04 with the following
commands:

git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git
cd nv-codec-headers/
make
sudo make install
cd ../
./configure --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree
--enable-libnpp --extra-cflags=-I/usr/local/cuda/include
--extra-ldflags=-L/usr/local/cuda/lib64
make -j8

Everything looks fine. However, when I run the following command

./configure --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree
--enable-libnpp --extra-cflags=-I/usr/local/cuda/include
--extra-ldflags=-L/usr/local/cuda/lib64

I don't see any ffmpeg related process on GPU. I mean the "nvidia-smi -l"
command shows nothing related to ffmpeg and that means ffmpeg is not using
GPU. The output of the command look normal and it has normal progress.

...
rame= 2280 fps=113 q=31.0 size=   38400kB time=00:01:16.52
bitrate=4110.8kbits/s speed=3.7frame= 2334 fps=113 q=31.0 size=   39936kB
time=00:01:18.20 bitrate=4183.2kbits/s speed=3.7[mp4 @ 0x55c859ecd3c0]
Starting second pass: moving the moov atom to the beginning of the file
frame= 2348 fps=113 q=31.0 Lsize=   40272kB time=00:01:18.31
bitrate=4212.8kbits/s speed=3.76x
video:40182kB audio:22kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.169521%
[aac @ 0x55c859e9b880] Qavg: 65536.000


Any idea?


Regards,
Mahmood