Memory traffic for ~/Downloads/argus/build/samples/gstVideoEncode

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

Hi Folks,

I would like to understand memory traffic for the argus example gstVideoEncode. This example, seem to encode from camera and preview at the same time.

I would like to understand life cycle of input frame buffer. My am wondering whether a video frame (as captured from camera ) is read out (from memory ) two times (once by MSENC/encoder and another time by PreviewConsumer ) ? Whether there is an on chip chache which can buffer the input frame buffer such that the frame is fetched only once by the two consumers of that frame ?

Thanks,

2

Hi dumbogeorge
The ISP can output multi resolution to the consumer. Like consumer can get two different resolution for preview and video encoder. That’s HW process wouldn’t take much system loading.

3

Thanks ShaneCCC. SO it seems that Encoder and PreviewConsumer will read their copies of frame independently. Yes I feel that should not be too much of load on system. Just curious, will they read independently even if their resolutions, fps, pixel format are same ?

Thanks,

4

Yes, event the resolution/pixel format are the same.