High CPU usage decoding 4K 60fps video

[Sergio González]

Dear All,

I am having an issue when using gstreamer to decode 4K 60fps video in a
custom app.

The pipeline's structure is as follows:

appsrc ! queue ! typefind ! h265parse ! capsfilter ! avdec_h265 ! queue !
videoconvert ! queue ! appsink

What I am observing is that when I push buffers to the appsrc, if the
decoding components are linked, there is a high surge of CPU consumption
(as in, 12 of the 16 cores are at 100%). However, if on the same machine I
just execute the same pipeline with gst-launch, the cpu usage is way more
reasonable and the decoding goes smoothly.

Adding a Probe to the sink and the source pads of the avdec_h265 tells me
that the time between decoding buffers at the beginning is of about 200ms,
but as app keeps decoding, it soon reaches 600ms.

Do you have some insight on what might cause this? Maybe I am missing some
property in some of the components?

Any help would be much appreciated. Let me know if you need any more
information.

Cheers,
Sergio
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20220726/8a60bdca/attachment.htm>