GStreamer In-Band Metadata for MPEG Transport Stream - Performance

GStreamer In-Band Metadata for MPEG Transport Stream
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TL;DR

This section is organized as follows:

• NXP i.MX95 Performance

NXP i.MX95 Platform

Benchmark environment

The following setup was used for all the benchmarks:

• Verdin NXP i.MX95
• Toradex manifest with BSP version 7

Instruments:

• CPU: top command
• RAM: top command
• GstPERF: perf plugin

Replicate the Results

The following pipelines were used to measure the performance.

H264 Metadata

gst-launch-1.0 metasrc metadata=%T period=1000 ! meta/x-klv,parsed=true,stream_type=21 ! perf print-cpu-load=true ! queue ! mpegtsmux name=mux ! filesink location=meta.ts  v4l2src device=/dev/video6 ! video/x-raw,format=YUY2,width=1920,height=1080,framerate=30/1 ! queue ! v4l2h264enc ! h264parse ! mux.

H265 Metadata

gst-launch-1.0 metasrc metadata=%T period=1000 ! meta/x-klv,parsed=true,stream_type=21 ! perf print-cpu-load=true ! queue ! mpegtsmux name=mux ! filesink location=meta.ts  v4l2src device=/dev/video6 ! video/x-raw,format=YUY2,width=1920,height=1080,framerate=30/1 ! queue ! v4l2h265enc ! h265parse ! mux.

Simple Metadata

gst-launch-1.0 metasrc metadata=The_current_time_is:%T period=1000 ! 'meta/x-klv' ! perf print-cpu-load=true ! filesink sync=false async=true location=meta.txt

Results

The following images show the average values of usage, respectively.

CPU Usage

RAM Usage

Framerate

The following graph shows exactly when the metadata was injected, in this case at one second.

Summary

The following table summarize the results.

Pipeline	CPU (%)	RAM (MB)	RAM (%)
Simple	0.167	8.176	0.110
H264	16.853	13.511	0.177
H265	17.141	14.425	0.188