dongrixinyu / ffio Goto Github PK

Hi, thank you so much for your project
Does this library support use cuda?

BTW:
It seems that some codes of pyFFmpeg/main.c are the same with pyFFmpeg/extractFrame.c, so I am curious about what is the usage of main.c?

I'm not too familiar with the details of video processing, but I'd like to share some performance observations from my practice.

CPU Usage for Decoding

My test involves pulling a single original video stream, doing some intermediate processing (consuming about 50% of CPU), then re-encoding and pushing it to an RTMP server(about 12% of CPU, using GPU encoding). I then watch the final processed live stream.

Here's my setup:

• CPU: Intel Xeon Gold 5118 2.30GHz x8
• GPU: Nvidia Tesla V100 32GB
• Origin Video: 1080p 24fps, 4Mbps h264-baseline

The CPU usage below are not exact measurements, they are merely my intuitive perception from observing htop.

When it comes to 6-stream parallel decoding:

• With GPU: CPU usage stabilizes at nearly 100% across all 8 cores, and the resulting video stream is almost smooth.
• With CPU: The total CPU usage fluctuates between 40% and 80%, but the video is more stuttered compared to using GPU.

In my case, I might opt for the GPU solution as it appears more stable, although it seems not so friendly to energy efficiency.