Created attachment 131488 [details] [review] nice-transmitter: fix nicesrc locking state before unlink The last rare bug of this series: I noticed sometimes the nicesrc element being disposed, while still in playing state. This was surprising, because the element was properly set in the null state in fs_nice_transmitter_free_gst_stream(), but before being unlinked, unref()ed, and disposed, it appears that some higher level element (the conference element IIRC) was put in playing state, causing all the underlying elements to follow the same transition, including the nicesrc. A possible fix to prevent that situation may be to put the nicesrc element in a locked state, just like we do with nicesinks[] ?
This bug was introduced by some other patch you have, the sources are first removed from the pipeline, so that any error messages don't get propagated. Then they are stopped.
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