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[transcriberbin] - make audioqueue leaky
If transcription runs slow or has issues the queue can fill up and block all audio processing. This gives the queue a sufficent buffer and allows it to drop audio if it eventually fills up. This was most noticable with bad internet connections using the `awstrnascriber` where it would take quite a while for the websocket to eventually timeout and the bin to enter `passthrough=true`. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/688>
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@ -93,6 +93,10 @@ impl TranscriberBin {
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gst::debug!(CAT, obj: element, "Building transcription bin");
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let aqueue_transcription = gst::ElementFactory::make("queue", Some("transqueue"))?;
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aqueue_transcription.set_property("max-size-buffers", 0u32);
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aqueue_transcription.set_property("max-size-bytes", 0u32);
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aqueue_transcription.set_property("max-size-time", 5_000_000_000u64);
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aqueue_transcription.set_property_from_str("leaky", "downstream");
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let ccconverter = gst::ElementFactory::make("ccconverter", None)?;
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state.transcription_bin.add_many(&[
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