"GST_MESSAGE_WARNING: Pipeline construction is invalid, please add queues"

[David Ing]

A queue is not just a queue, it is also a thread boundary.  Some elements
require separation across a thread boundary (especially after elements with
multiple src pads ... you want a queue after each src).

You can probably experiment with placing queues in various locations until
it works.

On Fri, Sep 6, 2019, 8:25 PM Ben Rush <ben at ben-rush.net> wrote:

> Why would I get that for the following pipeline?
>
> rtspsrc location=rtsp://<myip>:8554/<streamName> drop-on-latency=true !
> decodebin ! mfxvpp !
> video/x-raw(memory:MFXSurface),format=BGRA,width=256,height=192 ! queue
> leaky=1 max-size-buffers = 0 ! appsink name = sink
>
> There is a queue in the pipeline.
>
> It's also worth noting I need this to be as real-time as possible. I'd
> rather not have a lengthy queue.
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