GStreamer In-Band Metadata for MPEG Transport Stream - Performance

TL;DR

This section is organized as follows:

Qualcomm Dragonwing 9075 EVK Performance
NXP i.MX95 Performance

Qualcomm Dragonwing 9075 EVK Platform

Benchmark environment

The following setup was used for all the benchmarks:

Instruments:

GstPERF: perf plugin

Replicate the Results

The following pipelines were used to measure the performance.

For each pipeline the following periods in milliseconds of injecting data were tested.

METADATA_PERIODS=(
    33
    20
    16
    10
)

Additionally the following frequencies were tested for each period.

FRAMERATES=(
    30
    60
    90
    120
)

H264 Metadata

gst-launch-1.0 metasrc metadata=%T period=$PERIOD ! meta/x-klv,parsed=true,stream_type=21 ! perf print-cpu-load=true ! queue ! mpegtsmux name=mux ! filesink location=meta.ts  videotestsrc is-live=true ! video/x-raw,format=NV12,width=1920,height=1080,framerate=$FRAMERATE ! queue ! v4l2h264enc ! h264parse ! mux.

Simple Metadata

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

Framerate

The following table shows the maximum framerate and corresponding period for which the performance error remains below 5% of the expected framerate.


Framerate	Minimum Period for Metadata
30	10 ms
60	10 ms
90	10 ms
120	10 ms

Metadata size

The following table shows the maximum recommended metadata size for which the performance error remains below 5% of the expected framerate.


Framerate	Maximum recommended metadata size
30	126 KB
60	126 KB
90	126 KB
120	126 KB

NXP i.MX95 Platform