Hi,
Looking at the docs I can see GstBaseSink exposes a bunch of stats
However when using a specific sink likertmp2sink or srtsink I only have the stats defined on those sink’s available when getting the stats structure from the element.
I tried downcasting my element to a basesink but that did not yield the expected results.
How can I access the properties in the base sink stats object?
Can you show the code that you tried?
Apologies for not posting code from the get go.
I am scraping the sinks to pull stats and am unable to get BaseSink stats properties, for example “dropped”, which I can see is declared in BaseSink GstBaseSink.
I am sure I am missing rather obvious.
for element in pipeline_elements {
let name = element.type_().name();
if name.eq("GstSRTSink") {
let srt_sink_stats = element
.property_value("stats")
.get::<gst::Structure>().unwrap();
let out_bytes_total = srt_sink_stats.get::<u64>("bytes-sent-total").unwrap();
println!("srt sink {:?}", out_bytes_total);
let dropped = srt_sink_stats.get::<u64>("dropped");
let avg_rate = srt_sink_stats.get::<u64>("average-rate");
let rendered = srt_sink_stats.get::<f64>("rendered");
println!("dropped {:?} avg rate {:?} rendered {:?}", dropped, avg_rate, rendered);
} ... I observe the same behaviour with rtmp2sink
}
I can see stats available in srtsink, and basesink, in different identifiers e.g. GstRtmpConnectionStats, application/x-gst-base-sink-stats and application/x-srt-statistics , the rtmp2 property being the odd named out.
I tried casting to gst_base::BaseSink and getting the .stats property from that, but it did not work either.
Yeah this is actually a bug. You can’t access the basesink stats by property from srtsink / rtmp2sink because they’re both providing a new property with the same name, effectively overriding the one from basesink. Can you create a gitlab issue for that?
To access the basesink stats you should be able to do
let sink = sink.downcast_ref::<gst_base::BaseSink>().unwrap();
let stats = sink.stats(); // calls gst_base_sink_get_stats() directly instead of going via the property
Also unrelated, this is the same but shorter
let srt_sink_stats = element
- .property_value("stats")
- .get::<gst::Structure>().unwrap();
+ .property::<gst::Structure>("stats");
let sink = sink.downcast_ref::<gst_base::BaseSink>().unwrap();
let stats = sink.stats();
I did this, and get an error. will dig a bit and report back.
sorry I used downcast, not downcast_ref.
Although neither seem t work.
My deps are
gst = { package = “gstreamer”, version = “0.22.4” }
gst-base = { package = “gstreamer-base”, version = “0.22.0” }
gst-video = { package = “gstreamer-video”, version = “0.22.4” }
gst-app = { package = “gstreamer-app”, version = “0.22.0” }
in my test base it is not compiling using stats property. And getting the stats via the glip property grabber gives me the same one as on the Rtmp2Sink (and SrtSink)
If you look at the next lines of the error message it should suggest you to get gst_base::prelude::BaseSinkExt into scope as that has such a method.
Try adding use gst_base::prelude::* at the top of your file.
thanks for answering.
